Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

260 files changed, 10194 insertions, 0 deletions

diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/browser.js b/js/src/tests/test262/language/expressions/class/elements/syntax/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/browser.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/browser.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/browser.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/class-heritage-array-literal-arrow-heritage.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/class-heritage-array-literal-arrow-heritage.js
new file mode 100644
index 0000000000..82db7c4134
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/class-heritage-array-literal-arrow-heritage.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/class-heritage-array-literal-arrow-heritage.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if an array literal evaluated on ClassHeritage uses a private name. (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassTail : ClassHeritage { ClassBody }
+
+    ClassHeritage :
+        extends LeftHandSideExpression
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends () => {} {
+  
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/class-heritage-array-literal-async-arrow-heritage.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/class-heritage-array-literal-async-arrow-heritage.js
new file mode 100644
index 0000000000..bc9e9e4f0c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/class-heritage-array-literal-async-arrow-heritage.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/class-heritage-array-literal-async-arrow-heritage.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if an array literal evaluated on ClassHeritage uses a private name. (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassTail : ClassHeritage { ClassBody }
+
+    ClassHeritage :
+        extends LeftHandSideExpression
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends async () => {} {
+  
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/browser.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/browser.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..b2512ecd2a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-accessor-get.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor get method (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class-fields-public, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete (g().#m);
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..798847cd9e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-accessor-set.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor set method (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-methods-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete (g().#m);
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..c9b511f5b4
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-async-gen.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async generator (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete (g().#m);
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-async.js
new file mode 100644
index 0000000000..8508851470
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-async.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async method (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete (g().#m);
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-gen.js
new file mode 100644
index 0000000000..e368898235
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method-gen.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName generator (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete (g().#m);
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method.js
new file mode 100644
index 0000000000..07d490312d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-method.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private ordinary method (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete (g().#m);
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-no-reference.js
new file mode 100644
index 0000000000..7935befd05
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-private-no-reference.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName no referencing class element (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete (g().#m);
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-privatename.js
new file mode 100644
index 0000000000..7a9f632c7c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-call-expression-privatename.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private field (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete (g().#x);
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..a334ebe864
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-accessor-get.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor get method (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete (this.#m
+);
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..a356406272
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-accessor-set.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor set method (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete (this.#m
+);
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..ece01c0740
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-async-gen.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async generator (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete (this.#m
+);
+
+  async *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-async.js
new file mode 100644
index 0000000000..02e4fb26d1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-async.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async method (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete (this.#m
+);
+
+  async #m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-gen.js
new file mode 100644
index 0000000000..fd998f6ac1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method-gen.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName generator (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete (this.#m
+);
+
+  *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method.js
new file mode 100644
index 0000000000..4f40fe2fb6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-method.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private ordinary method (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete (this.#m
+);
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-no-reference.js
new file mode 100644
index 0000000000..fad6f3fcea
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-private-no-reference.js
@@ -0,0 +1,44 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName no referencing class element (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete (this.#m);
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-privatename.js
new file mode 100644
index 0000000000..e51d679f5e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-covered-err-delete-member-expression-privatename.js
@@ -0,0 +1,44 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-field-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private field (in field, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete (this.#x);
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..13d3c2a740
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-accessor-get.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor get method (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class-fields-public, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete g().#m;
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..dc8cc53146
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-accessor-set.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor set method (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-methods-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete g().#m;
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..cfd5642852
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-async-gen.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async generator (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete g().#m;
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-async.js
new file mode 100644
index 0000000000..8d0017cd7a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-async.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async method (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete g().#m;
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-gen.js
new file mode 100644
index 0000000000..aeee377042
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method-gen.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName generator (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete g().#m;
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method.js
new file mode 100644
index 0000000000..15b226efaa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-method.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private ordinary method (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete g().#m;
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-no-reference.js
new file mode 100644
index 0000000000..94d9388a28
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-private-no-reference.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName no referencing class element (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete g().#m;
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-privatename.js
new file mode 100644
index 0000000000..1279184624
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-call-expression-privatename.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private field (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete g().#x;
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..af609549ac
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-accessor-get.js
@@ -0,0 +1,39 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor get method (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete this.#m
+;
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..c3788377dd
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-accessor-set.js
@@ -0,0 +1,39 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor set method (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete this.#m
+;
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..9fb99b093c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-async-gen.js
@@ -0,0 +1,39 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async generator (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete this.#m
+;
+
+  async *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-async.js
new file mode 100644
index 0000000000..07027cffdf
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-async.js
@@ -0,0 +1,39 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async method (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete this.#m
+;
+
+  async #m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-gen.js
new file mode 100644
index 0000000000..1fc96dc94d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method-gen.js
@@ -0,0 +1,39 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName generator (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete this.#m
+;
+
+  *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method.js
new file mode 100644
index 0000000000..f343d70e52
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-method.js
@@ -0,0 +1,39 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private ordinary method (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete this.#m
+;
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-no-reference.js
new file mode 100644
index 0000000000..f44b5e2eba
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-private-no-reference.js
@@ -0,0 +1,38 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName no referencing class element (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete this.#m;
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-privatename.js
new file mode 100644
index 0000000000..3684a03b1c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-err-delete-member-expression-privatename.js
@@ -0,0 +1,38 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-field-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private field (in field)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete this.#x;
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..521df0882e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-accessor-get.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor get method (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class-fields-public, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete ((g().#m));
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..676ddedde5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-accessor-set.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor set method (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-methods-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete ((g().#m));
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..b22a41d94e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-async-gen.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async generator (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete ((g().#m));
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-async.js
new file mode 100644
index 0000000000..78aa29f4ef
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-async.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async method (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete ((g().#m));
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-gen.js
new file mode 100644
index 0000000000..6fde3047fb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method-gen.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName generator (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete ((g().#m));
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method.js
new file mode 100644
index 0000000000..ae9e2773c2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-method.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private ordinary method (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete ((g().#m));
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-no-reference.js
new file mode 100644
index 0000000000..a805848fb4
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-private-no-reference.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName no referencing class element (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete ((g().#m));
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-privatename.js
new file mode 100644
index 0000000000..79757d74aa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-call-expression-privatename.js
@@ -0,0 +1,46 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private field (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  g = this.f;
+  x = delete ((g().#x));
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..84eed95eb5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-accessor-get.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor get method (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete ((this.#m
+));
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..1406396b52
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-accessor-set.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor set method (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete ((this.#m
+));
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..7a47defea3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-async-gen.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async generator (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete ((this.#m
+));
+
+  async *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-async.js
new file mode 100644
index 0000000000..e56fa55529
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-async.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async method (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete ((this.#m
+));
+
+  async #m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-gen.js
new file mode 100644
index 0000000000..97a9234bbe
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method-gen.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName generator (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete ((this.#m
+));
+
+  *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method.js
new file mode 100644
index 0000000000..3a05b6575a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-method.js
@@ -0,0 +1,45 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private ordinary method (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete ((this.#m
+));
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-no-reference.js
new file mode 100644
index 0000000000..eb6130794f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-private-no-reference.js
@@ -0,0 +1,44 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName no referencing class element (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete ((this.#m));
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-privatename.js
new file mode 100644
index 0000000000..354e0c8746
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/field-delete-twice-covered-err-delete-member-expression-privatename.js
@@ -0,0 +1,44 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-field-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private field (in field, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  
+  x = delete ((this.#x));
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..1d59d48077
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-accessor-get.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor get method (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class-fields-public, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete (g().#m);
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..088f8034c8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-accessor-set.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor set method (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-methods-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete (g().#m);
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..f2537ac404
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-async-gen.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async generator (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete (g().#m);
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-async.js
new file mode 100644
index 0000000000..ece3271eac
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-async.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async method (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete (g().#m);
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-gen.js
new file mode 100644
index 0000000000..45748d6453
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method-gen.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName generator (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete (g().#m);
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method.js
new file mode 100644
index 0000000000..3268a64c8b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-method.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private ordinary method (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete (g().#m);
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-no-reference.js
new file mode 100644
index 0000000000..b2bf807f91
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-private-no-reference.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName no referencing class element (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete (g().#m);
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-privatename.js
new file mode 100644
index 0000000000..ce67c08981
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-call-expression-privatename.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private field (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete (g().#x);
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..6a33ec513a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-accessor-get.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor get method (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete (this.#m
+);
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..8599c6db4b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-accessor-set.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor set method (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete (this.#m
+);
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..b51764253f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-async-gen.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async generator (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete (this.#m
+);
+  }
+
+  async *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-async.js
new file mode 100644
index 0000000000..ba8f5379aa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-async.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async method (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete (this.#m
+);
+  }
+
+  async #m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-gen.js
new file mode 100644
index 0000000000..6ab21db9ff
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method-gen.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName generator (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete (this.#m
+);
+  }
+
+  *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method.js
new file mode 100644
index 0000000000..4d5ed5fafd
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-method.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private ordinary method (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete (this.#m
+);
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-no-reference.js
new file mode 100644
index 0000000000..7dd3a6f614
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-private-no-reference.js
@@ -0,0 +1,47 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName no referencing class element (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete (this.#m);
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-privatename.js
new file mode 100644
index 0000000000..e37573bb18
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-covered-err-delete-member-expression-privatename.js
@@ -0,0 +1,47 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-method-delete-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private field (in method, covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete (this.#x);
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..64782fb080
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-accessor-get.js
@@ -0,0 +1,43 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor get method (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class-fields-public, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete g().#m;
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..269fb608db
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-accessor-set.js
@@ -0,0 +1,43 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor set method (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-methods-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete g().#m;
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..664f377763
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-async-gen.js
@@ -0,0 +1,43 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async generator (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete g().#m;
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-async.js
new file mode 100644
index 0000000000..a98ceca0cd
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-async.js
@@ -0,0 +1,43 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async method (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete g().#m;
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-gen.js
new file mode 100644
index 0000000000..84833780fb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method-gen.js
@@ -0,0 +1,43 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName generator (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete g().#m;
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method.js
new file mode 100644
index 0000000000..835ed1fd44
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-method.js
@@ -0,0 +1,43 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private ordinary method (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete g().#m;
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-no-reference.js
new file mode 100644
index 0000000000..a7376b9182
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-private-no-reference.js
@@ -0,0 +1,43 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName no referencing class element (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete g().#m;
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-privatename.js
new file mode 100644
index 0000000000..2c99382921
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-call-expression-privatename.js
@@ -0,0 +1,43 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private field (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete g().#x;
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..673f8a9150
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-accessor-get.js
@@ -0,0 +1,42 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor get method (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete this.#m
+;
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..bb0c6fe2a0
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-accessor-set.js
@@ -0,0 +1,42 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor set method (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete this.#m
+;
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..beace328f7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-async-gen.js
@@ -0,0 +1,42 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async generator (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete this.#m
+;
+  }
+
+  async *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-async.js
new file mode 100644
index 0000000000..2c1bb28812
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-async.js
@@ -0,0 +1,42 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async method (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete this.#m
+;
+  }
+
+  async #m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-gen.js
new file mode 100644
index 0000000000..309a961850
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method-gen.js
@@ -0,0 +1,42 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName generator (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete this.#m
+;
+  }
+
+  *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method.js
new file mode 100644
index 0000000000..ad7e8213a0
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-method.js
@@ -0,0 +1,42 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private ordinary method (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete this.#m
+;
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-no-reference.js
new file mode 100644
index 0000000000..aac0c28dbf
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-private-no-reference.js
@@ -0,0 +1,41 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName no referencing class element (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete this.#m;
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-privatename.js
new file mode 100644
index 0000000000..2bce7badb7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-err-delete-member-expression-privatename.js
@@ -0,0 +1,41 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-method-delete.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private field (in method)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete this.#x;
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..c775181794
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-accessor-get.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor get method (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class-fields-public, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete ((g().#m));
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..1b5d682217
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-accessor-set.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName accessor set method (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private, class-methods-private, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete ((g().#m));
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..73e6d13717
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-async-gen.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async generator (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete ((g().#m));
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-async.js
new file mode 100644
index 0000000000..ff22910b9f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-async.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName async method (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete ((g().#m));
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-gen.js
new file mode 100644
index 0000000000..178c58cc17
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method-gen.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName generator (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete ((g().#m));
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method.js
new file mode 100644
index 0000000000..804878eeae
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-method.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private ordinary method (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete ((g().#m));
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-no-reference.js
new file mode 100644
index 0000000000..9879a56843
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-private-no-reference.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName no referencing class element (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete ((g().#m));
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-privatename.js
new file mode 100644
index 0000000000..d5aaaf5cc9
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-call-expression-privatename.js
@@ -0,0 +1,49 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-call-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to CallExpression.PrivateName private field (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    var g = this.f;
+    delete ((g().#x));
+  }
+
+  f() {
+  return this;
+  }
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-accessor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-accessor-get.js
new file mode 100644
index 0000000000..13e1285307
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-accessor-get.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-get.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor get method (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete ((this.#m
+));
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-accessor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-accessor-set.js
new file mode 100644
index 0000000000..05b109751a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-accessor-set.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-accessor-set.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName accessor set method (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete ((this.#m
+));
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-async-gen.js
new file mode 100644
index 0000000000..df019414c1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-async-gen.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async generator (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-iteration, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete ((this.#m
+));
+  }
+
+  async *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-async.js
new file mode 100644
index 0000000000..5571e89254
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-async.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-async.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName async method (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, async-functions, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete ((this.#m
+));
+  }
+
+  async #m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-gen.js
new file mode 100644
index 0000000000..c776e1f41b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method-gen.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method-gen.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName generator (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, generators, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete ((this.#m
+));
+  }
+
+  *#m() {}
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method.js
new file mode 100644
index 0000000000..d18c53884f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-method.js
@@ -0,0 +1,48 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-method.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private ordinary method (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class-methods-private, class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete ((this.#m
+));
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-no-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-no-reference.js
new file mode 100644
index 0000000000..fce05e88ba
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-private-no-reference.js
@@ -0,0 +1,47 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-private-no-reference.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName no referencing class element (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete ((this.#m));
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-privatename.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-privatename.js
new file mode 100644
index 0000000000..b7c06248fc
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/method-delete-twice-covered-err-delete-member-expression-privatename.js
@@ -0,0 +1,47 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/err-delete-member-expression-privatename.case
+// - src/class-elements/delete-error/cls-expr-method-delete-twice-covered.template
+/*---
+description: It's a SyntaxError if delete operator is applied to MemberExpression.PrivateName private field (in method, recursively covered)
+esid: sec-class-definitions-static-semantics-early-errors
+features: [class, class-fields-private]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    This file must never use the onlyStrict flag as the strict mode should always
+    be observed inside class bodies.
+
+    Static Semantics: Early Errors
+
+      UnaryExpression : delete UnaryExpression
+
+      It is a Syntax Error if the UnaryExpression is contained in strict mode
+      code and the derived UnaryExpression is
+      PrimaryExpression : IdentifierReference ,
+      MemberExpression : MemberExpression.PrivateName , or
+      CallExpression : CallExpression.PrivateName .
+
+      It is a Syntax Error if the derived UnaryExpression is
+      PrimaryExpression : CoverParenthesizedExpressionAndArrowParameterList and
+      CoverParenthesizedExpressionAndArrowParameterList ultimately derives a
+      phrase that, if used in place of UnaryExpression, would produce a
+      Syntax Error according to these rules. This rule is recursively applied.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  x() {
+    
+    delete ((this.#x));
+  }
+
+  
+}
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/shell.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/delete/shell.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-class-body-ctor-duplicate.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-class-body-ctor-duplicate.js
new file mode 100644
index 0000000000..03da89dd58
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-class-body-ctor-duplicate.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-class-body-ctor-duplicate.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It is a SyntaxError if the class body has more than one constructor (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrototypePropertyNameList of ClassElementList contains more
+        than one occurrence of "constructor".
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  constructor() {}
+  constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-ctor-super-no-heritage.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-ctor-super-no-heritage.js
new file mode 100644
index 0000000000..b5bed2447f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-ctor-super-no-heritage.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-ctor-super-no-heritage.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It is a SyntaxError if class has no heritage and constructor has a direct super (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassTail : ClassHeritageopt { ClassBody }
+
+    It is a Syntax Error if ClassHeritage is not present and the following algorithm evaluates to true:
+      1. Let constructor be ConstructorMethod of ClassBody.
+      2. If constructor is empty, return false.
+      3. Return HasDirectSuper of constructor.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  constructor() {
+    super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-ues-error.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-ues-error.js
new file mode 100644
index 0000000000..8eb2bdf13e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-ues-error.js
@@ -0,0 +1,71 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-field-identifier-invalid-ues-error.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Invalid FieldDefinition, ClassElementName, PropertyName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PropertyName :
+      LiteralPropertyName
+      ComputedPropertyName
+
+    LiteralPropertyName :
+      IdentifierName
+      StringLiteral
+      NumericLiteral
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart ::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart ::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue ::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  \u0000;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-zwj-error.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-zwj-error.js
new file mode 100644
index 0000000000..5593b75c4b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-zwj-error.js
@@ -0,0 +1,71 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-field-identifier-invalid-zwj-error.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Invalid FieldDefinition, ClassElementName, PropertyName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PropertyName :
+      LiteralPropertyName
+      ComputedPropertyName
+
+    LiteralPropertyName :
+      IdentifierName
+      StringLiteral
+      NumericLiteral
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart ::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart ::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue ::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  \u200D_ZWJ;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-zwnj-error.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-zwnj-error.js
new file mode 100644
index 0000000000..f116c19c29
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-field-identifier-invalid-zwnj-error.js
@@ -0,0 +1,71 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-field-identifier-invalid-zwnj-error.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Invalid FieldDefinition, ClassElementName, PropertyName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PropertyName :
+      LiteralPropertyName
+      ComputedPropertyName
+
+    LiteralPropertyName :
+      IdentifierName
+      StringLiteral
+      NumericLiteral
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart ::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart ::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue ::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  \u200C_ZWNJ;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-fields-same-line-error.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-fields-same-line-error.js
new file mode 100644
index 0000000000..195c83740f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-fields-same-line-error.js
@@ -0,0 +1,34 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-fields-same-line-error.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: SyntaxError (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  x y
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-array-literal.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-array-literal.js
new file mode 100644
index 0000000000..1b8d6f8ca8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-array-literal.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-environment-on-class-heritage-array-literal.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if an array literal evaluated on ClassHeritage uses a private name. (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage { ClassBody }
+        ...
+        5. Let outerPrivateEnvironment be the PrivateEnvironment of the running execution context.
+        6. Let classPrivateEnvironment be NewDeclarativeEnvironment(outerPrivateEnvironment).
+        7. Let classPrivateEnvRec be classPrivateEnvironment's EnvironmentRecord.
+        8. If ClassBodyopt is present, then
+            a. For each element dn of the PrivateBoundIdentifiers of ClassBodyopt,
+              i. Perform classPrivateEnvRec.CreateImmutableBinding(dn, true).
+        9. If ClassHeritageopt is not present, then
+            a. Let protoParent be the intrinsic object %ObjectPrototype%.
+            b. Let constructorParent be the intrinsic object %FunctionPrototype%.
+        10. Else,
+            a. Set the running execution context's LexicalEnvironment to classScope.
+            b. NOTE: The running execution context's PrivateEnvironment is outerPrivateEnvironment when evaluating ClassHeritage.
+        ...
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends (o) => [o.#foo]
+{
+  #foo;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-chained-usage.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-chained-usage.js
new file mode 100644
index 0000000000..67f2881a6b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-chained-usage.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-environment-on-class-heritage-chained-usage.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class expression evaluated on ClassHeritage uses an private name declared on subclass. (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage { ClassBody }
+        ...
+        5. Let outerPrivateEnvironment be the PrivateEnvironment of the running execution context.
+        6. Let classPrivateEnvironment be NewDeclarativeEnvironment(outerPrivateEnvironment).
+        7. Let classPrivateEnvRec be classPrivateEnvironment's EnvironmentRecord.
+        8. If ClassBodyopt is present, then
+            a. For each element dn of the PrivateBoundIdentifiers of ClassBodyopt,
+              i. Perform classPrivateEnvRec.CreateImmutableBinding(dn, true).
+        9. If ClassHeritageopt is not present, then
+            a. Let protoParent be the intrinsic object %ObjectPrototype%.
+            b. Let constructorParent be the intrinsic object %FunctionPrototype%.
+        10. Else,
+            a. Set the running execution context's LexicalEnvironment to classScope.
+            b. NOTE: The running execution context's PrivateEnvironment is outerPrivateEnvironment when evaluating ClassHeritage.
+        ...
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends class extends class extends class { x = this.#foo; } { #foo; x = this.#bar; } { #bar; x = this.#fuz; }
+{
+  #fuz;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-function-expression.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-function-expression.js
new file mode 100644
index 0000000000..78d3c79f4d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-function-expression.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-environment-on-class-heritage-function-expression.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a function expression evaluated on ClassHeritage uses a private name. (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage { ClassBody }
+        ...
+        5. Let outerPrivateEnvironment be the PrivateEnvironment of the running execution context.
+        6. Let classPrivateEnvironment be NewDeclarativeEnvironment(outerPrivateEnvironment).
+        7. Let classPrivateEnvRec be classPrivateEnvironment's EnvironmentRecord.
+        8. If ClassBodyopt is present, then
+            a. For each element dn of the PrivateBoundIdentifiers of ClassBodyopt,
+              i. Perform classPrivateEnvRec.CreateImmutableBinding(dn, true).
+        9. If ClassHeritageopt is not present, then
+            a. Let protoParent be the intrinsic object %ObjectPrototype%.
+            b. Let constructorParent be the intrinsic object %FunctionPrototype%.
+        10. Else,
+            a. Set the running execution context's LexicalEnvironment to classScope.
+            b. NOTE: The running execution context's PrivateEnvironment is outerPrivateEnvironment when evaluating ClassHeritage.
+        ...
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends function() { x = this.#foo; }
+{
+  #foo;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-obj-literal.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-obj-literal.js
new file mode 100644
index 0000000000..570352da10
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-obj-literal.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-environment-on-class-heritage-obj-literal.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a object literal evaluated on ClassHeritage uses a private name. (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage { ClassBody }
+        ...
+        5. Let outerPrivateEnvironment be the PrivateEnvironment of the running execution context.
+        6. Let classPrivateEnvironment be NewDeclarativeEnvironment(outerPrivateEnvironment).
+        7. Let classPrivateEnvRec be classPrivateEnvironment's EnvironmentRecord.
+        8. If ClassBodyopt is present, then
+            a. For each element dn of the PrivateBoundIdentifiers of ClassBodyopt,
+              i. Perform classPrivateEnvRec.CreateImmutableBinding(dn, true).
+        9. If ClassHeritageopt is not present, then
+            a. Let protoParent be the intrinsic object %ObjectPrototype%.
+            b. Let constructorParent be the intrinsic object %FunctionPrototype%.
+        10. Else,
+            a. Set the running execution context's LexicalEnvironment to classScope.
+            b. NOTE: The running execution context's PrivateEnvironment is outerPrivateEnvironment when evaluating ClassHeritage.
+        ...
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends (o) => {x: o.#foo}
+{
+  #foo;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-recursive.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-recursive.js
new file mode 100644
index 0000000000..1e05ce0ee9
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-recursive.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-environment-on-class-heritage-recursive.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class expression evaluated on ClassHeritage of a ClassHeritage uses an undeclared private name. (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage { ClassBody }
+        ...
+        5. Let outerPrivateEnvironment be the PrivateEnvironment of the running execution context.
+        6. Let classPrivateEnvironment be NewDeclarativeEnvironment(outerPrivateEnvironment).
+        7. Let classPrivateEnvRec be classPrivateEnvironment's EnvironmentRecord.
+        8. If ClassBodyopt is present, then
+            a. For each element dn of the PrivateBoundIdentifiers of ClassBodyopt,
+              i. Perform classPrivateEnvRec.CreateImmutableBinding(dn, true).
+        9. If ClassHeritageopt is not present, then
+            a. Let protoParent be the intrinsic object %ObjectPrototype%.
+            b. Let constructorParent be the intrinsic object %FunctionPrototype%.
+        10. Else,
+            a. Set the running execution context's LexicalEnvironment to classScope.
+            b. NOTE: The running execution context's PrivateEnvironment is outerPrivateEnvironment when evaluating ClassHeritage.
+        ...
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends class extends class { x = this.#foo; } {}
+{
+  #foo;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage.js
new file mode 100644
index 0000000000..0595a11b49
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-environment-on-class-heritage.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class expression evaluated on ClassHeritage uses an undeclared private name. (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage { ClassBody }
+        ...
+        5. Let outerPrivateEnvironment be the PrivateEnvironment of the running execution context.
+        6. Let classPrivateEnvironment be NewDeclarativeEnvironment(outerPrivateEnvironment).
+        7. Let classPrivateEnvRec be classPrivateEnvironment's EnvironmentRecord.
+        8. If ClassBodyopt is present, then
+            a. For each element dn of the PrivateBoundIdentifiers of ClassBodyopt,
+              i. Perform classPrivateEnvRec.CreateImmutableBinding(dn, true).
+        9. If ClassHeritageopt is not present, then
+            a. Let protoParent be the intrinsic object %ObjectPrototype%.
+            b. Let constructorParent be the intrinsic object %FunctionPrototype%.
+        10. Else,
+            a. Set the running execution context's LexicalEnvironment to classScope.
+            b. NOTE: The running execution context's PrivateEnvironment is outerPrivateEnvironment when evaluating ClassHeritage.
+        ...
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends class { x = this.#foo; }
+{
+  #foo;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-field-on-object-destructuring.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-field-on-object-destructuring.js
new file mode 100644
index 0000000000..36e44e5068
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-field-on-object-destructuring.js
@@ -0,0 +1,33 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-field-on-object-destructuring.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Acessing private field from object destructuring pattern is not a valid syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, destructuring-binding, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ObjectAssignmentPattern[Yield, Await]:
+       {}
+       {AssignmentRestProperty[?Yield, ?Await]}
+       {AssignmentPropertyList[?Yield, ?Await]}
+       {AssignmentPropertyList[?Yield, ?Await],AssignmentRestProperty[?Yield, ?Await]opt}
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x = 1;
+
+  destructureX() {
+    const { #x: x } = this;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-field-super-access.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-field-super-access.js
new file mode 100644
index 0000000000..89e8c0f22a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-private-field-super-access.js
@@ -0,0 +1,36 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-field-super-access.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Acessing private field from super is not a valid syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    MemberExpression[Yield]:
+      MemberExpression[?Yield].PrivateName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #m = function() { return 'test262'; };
+
+  Child = class extends C {
+    access() {
+      return super.#m;
+    }
+
+    method() {
+      return super.#m();
+    }
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-async-gen.js
new file mode 100644
index 0000000000..5e1f7f40af
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-async-gen.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-async-gen.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private async generator and a private field with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class-fields-private, async-iteration, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+      It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #m;
+  async * #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-async.js
new file mode 100644
index 0000000000..37b14b65bb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-async.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-async.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private async function and a private field with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class-fields-private, async-functions, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+      It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #m;
+  async #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-gen.js
new file mode 100644
index 0000000000..33cb1fa13f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-gen.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-gen.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private generator and a private field with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class-fields-private, generators, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+      It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #m;
+  * #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-get-field.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-get-field.js
new file mode 100644
index 0000000000..4a7d5fcc74
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-get-field.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-get-field.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private getter and a private field with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #m;
+  get #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-get-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-get-get.js
new file mode 100644
index 0000000000..6532ab3fe4
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-get-get.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-get-get.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains multiple private getters with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  get #m() {}
+  get #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-field.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-field.js
new file mode 100644
index 0000000000..3e45b92222
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-field.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-meth-field.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private method and a private field with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #m;
+  #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-get.js
new file mode 100644
index 0000000000..3e8d39fbf1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-get.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-meth-get.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private method and a private getter with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  get #m() {}
+  #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-meth.js
new file mode 100644
index 0000000000..964f4b7995
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-meth.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-meth-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains multiple private methods with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #m() {}
+  #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-set.js
new file mode 100644
index 0000000000..f474ee6b7c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-set.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-meth-set.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private method and a private setter with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  set #m(_) {}
+  #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-staticfield.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-staticfield.js
new file mode 100644
index 0000000000..a979dddd35
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-staticfield.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-meth-staticfield.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private method and a private static field with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class-static-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static #m;
+  #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-staticmeth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-staticmeth.js
new file mode 100644
index 0000000000..bca26607c5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-meth-staticmeth.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-meth-staticmeth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private method and a private static method with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static #m() {}
+  #m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-set-field.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-set-field.js
new file mode 100644
index 0000000000..d122f531ae
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-set-field.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-set-field.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains a private setter and a private field with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #m;
+  set #m(_) {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-set-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-set-set.js
new file mode 100644
index 0000000000..63d3a13eaa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatemeth-duplicate-set-set.js
@@ -0,0 +1,27 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-set-set.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a class contains multiple private setters with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  set #m(_) {}
+  set #m(_) {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-constructor.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-constructor.js
new file mode 100644
index 0000000000..cf1e2a3ee5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-constructor.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-constructor.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Private Fields cannot be named constructor (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElementName : PrivateName ;
+        It is a Syntax Error if StringValue of PrivateName is "#constructor"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #constructor
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-error.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-error.js
new file mode 100644
index 0000000000..81043fa4dc
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-error.js
@@ -0,0 +1,37 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-error.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigial and IdentifierName (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  # x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-ues.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-ues.js
new file mode 100644
index 0000000000..dfd9d8e4a6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-ues.js
@@ -0,0 +1,65 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-identifier-invalid-ues.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Valid PrivateName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #\u0000;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-zwj-error.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-zwj-error.js
new file mode 100644
index 0000000000..ea09d25bae
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-zwj-error.js
@@ -0,0 +1,66 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-identifier-invalid-zwj-error.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Valid PrivateName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #\u200D_ZWJ;
+
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-zwnj-error.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-zwnj-error.js
new file mode 100644
index 0000000000..fcb16ab416
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-identifier-invalid-zwnj-error.js
@@ -0,0 +1,66 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-identifier-invalid-zwnj-error.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Valid PrivateName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #\u200C_ZWNJ;
+
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-in-computed-property-missing.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-in-computed-property-missing.js
new file mode 100644
index 0000000000..da1b15e591
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-in-computed-property-missing.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-in-computed-property-missing.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Use of undeclared PrivateName in ComputedProperty is a syntax error (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElementName:
+      PropertyName
+      PrivateIdentifier
+
+    PropertyName:
+      LiteralPropertyName
+      ComputedPropertyName
+
+    ComputedPropertyName:
+      [ AssignmentExpression ]
+
+    AssignmentExpression ... MemberExpression
+
+    MemberExpression:
+      MemberExpression . PrivateName
+
+    Static Semantics: AllPrivateIdentifiersValid
+      AllPrivateIdentifiersValid is an abstract operation which takes names as an argument.
+
+      MemberExpression : MemberExpression . PrivateIdentifier
+        1. If StringValue of PrivateIdentifier is in names, return true.
+        2. Return false.
+
+      ClassBody : ClassElementList
+        1. Let newNames be the concatenation of names with PrivateBoundIdentifiers of ClassBody.
+        2. Return AllPrivateIdentifiersValid of ClassElementList with the argument newNames.
+
+    Static Semantics: Early Errors
+
+    ScriptBody : StatementList
+      It is a Syntax Error if AllPrivateIdentifiersValid of StatementList with an empty List as an argument is false unless the source code is eval code that is being processed by a direct eval.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  [this.#f] = 'Test262'
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-accessor-get-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-accessor-get-meth.js
new file mode 100644
index 0000000000..baf4ed6809
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-accessor-get-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-accessor-get-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName () (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  get # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-accessor-set-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-accessor-set-meth.js
new file mode 100644
index 0000000000..113af0007f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-accessor-set-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-accessor-set-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Accessor set Method) (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  set # m(_) {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-async-gen-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-async-gen-meth.js
new file mode 100644
index 0000000000..7d2c9a6cd6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-async-gen-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-async-gen-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Async Generator Method) (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  async * # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-async-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-async-meth.js
new file mode 100644
index 0000000000..1e3fe1815c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-async-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-async-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Async Method) (class expression)
+esid: prod-ClassElement
+features: [async-functions, class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  async # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-call-expr.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-call-expr.js
new file mode 100644
index 0000000000..d0461d7a90
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-call-expr.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-call-expr.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (CallExpression) (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    MemberExpression :
+      MemberExpression . PrivateName
+
+    CallExpression :
+      CallExpression . PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+
+  f() {
+    return this;
+  }
+
+  m() {
+    this.f().# x;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-field-init.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-field-init.js
new file mode 100644
index 0000000000..89fa995f50
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-field-init.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-field-init.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Field with Initializer) (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  # x = 1;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-field.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-field.js
new file mode 100644
index 0000000000..df291aac7b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-field.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-field.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Field) (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  # x;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-gen-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-gen-meth.js
new file mode 100644
index 0000000000..57da2b2c3a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-gen-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-gen-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Generator Method) (class expression)
+esid: prod-ClassElement
+features: [generators, class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  * # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-member-expr.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-member-expr.js
new file mode 100644
index 0000000000..9afdf95064
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-member-expr.js
@@ -0,0 +1,35 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-member-expr.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (MemberExpression) (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    MemberExpression :
+      MemberExpression . PrivateName
+
+    CallExpression :
+      CallExpression . PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x;
+  m() {
+    this.# x;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-meth.case.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-meth.case.js
new file mode 100644
index 0000000000..859d49c5dd
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-meth.case.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-meth.case.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Method) (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-accessor-get-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-accessor-get-meth.js
new file mode 100644
index 0000000000..13d9e1fdf8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-accessor-get-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-static-accessor-get-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Static Accessor get Method) (class expression)
+esid: prod-ClassElement
+features: [class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static get # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-accessor-set-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-accessor-set-meth.js
new file mode 100644
index 0000000000..38937b2f6f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-accessor-set-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-static-accessor-set-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Static Accessor set Method) (class expression)
+esid: prod-ClassElement
+features: [class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static set # m(_) {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-async-gen-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-async-gen-meth.js
new file mode 100644
index 0000000000..e351811145
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-async-gen-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-static-async-gen-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Static Async Generator Method) (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static async * # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-async-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-async-meth.js
new file mode 100644
index 0000000000..f06dfe12c8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-async-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-static-async-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Async Method) (class expression)
+esid: prod-ClassElement
+features: [class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static async # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-field-init.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-field-init.js
new file mode 100644
index 0000000000..3a5104c1a3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-field-init.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-static-field-init.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Static Field with Initializer) (class expression)
+esid: prod-ClassElement
+features: [class-static-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static # x = 1;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-field.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-field.js
new file mode 100644
index 0000000000..90e18f3ca8
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-field.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-static-field.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Static Field) (class expression)
+esid: prod-ClassElement
+features: [class-static-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static # x;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-gen-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-gen-meth.js
new file mode 100644
index 0000000000..83dd76ba01
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-gen-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-static-gen-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Static Generator Method) (class expression)
+esid: prod-ClassElement
+features: [generators, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static * # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-meth.js
new file mode 100644
index 0000000000..2187eacfc7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatename-whitespace-error-static-meth.js
@@ -0,0 +1,30 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-whitespace-error-static-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: No space allowed between sigil and IdentifierName (Static Method) (class expression)
+esid: prod-ClassElement
+features: [class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Updated Productions
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static # m() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatenames-same-line-error.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatenames-same-line-error.js
new file mode 100644
index 0000000000..50afad12ed
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-privatenames-same-line-error.js
@@ -0,0 +1,37 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatenames-same-line-error.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: SyntaxError (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  #x #y
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-async-gen.js
new file mode 100644
index 0000000000..4a14cfc68a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-async-gen.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-async-gen.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Async Generator Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  async * method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-async.js
new file mode 100644
index 0000000000..4e730e6cce
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-async.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-async.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Async Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [async-functions, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  async method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-gen.js
new file mode 100644
index 0000000000..ed359acf1c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-gen.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-gen.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Generator Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [generators, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  * method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-get.js
new file mode 100644
index 0000000000..abe21071b3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-get.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-get.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Accessor get Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  get method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-method.js
new file mode 100644
index 0000000000..65ff8cedb9
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-method.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-method.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-async-gen.js
new file mode 100644
index 0000000000..220d38438a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-async-gen.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-private-async-gen.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Private Async Generators Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  async * #method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-async.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-async.js
new file mode 100644
index 0000000000..a7c65a536b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-async.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-private-async.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Private Async Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [async-functions, class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  async #method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-gen.js
new file mode 100644
index 0000000000..8b1df2d381
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-gen.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-private-gen.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Private Generators Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [generators, class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  * #method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-method.js
new file mode 100644
index 0000000000..68e3af892a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-private-method.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-private-method.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Private Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  #method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-set.js
new file mode 100644
index 0000000000..ea1f444e26
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-contains-super-set.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-contains-super-set.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Accessor set Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  set method(_) {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-async-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-async-gen.js
new file mode 100644
index 0000000000..fafd93217e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-async-gen.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-ctor-async-gen.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Async Generator Methods cannot be named "constructor" (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  async * constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-async-meth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-async-meth.js
new file mode 100644
index 0000000000..2ddc1484a5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-async-meth.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-ctor-async-meth.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Async Methods cannot be named "constructor" (class expression)
+esid: prod-ClassElement
+features: [async-functions, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  async constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-gen.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-gen.js
new file mode 100644
index 0000000000..d2a097d885
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-gen.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-ctor-gen.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Generator Methods cannot be named "constructor" (class expression)
+esid: prod-ClassElement
+features: [generators, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  * constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-get.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-get.js
new file mode 100644
index 0000000000..1f7a82091c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-get.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-ctor-get.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Accessor get Methods cannot be named "constructor" (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  get constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-set.js
new file mode 100644
index 0000000000..f4d0eb692f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-special-meth-ctor-set.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-meth-ctor-set.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Accessor set Methods cannot be named "constructor" (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  set constructor(_) {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-gen-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-gen-meth-prototype.js
new file mode 100644
index 0000000000..71ed3b4c64
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-gen-meth-prototype.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-async-gen-meth-prototype.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Async Generator Methods cannot be named prototype (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static async * prototype() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-gen-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-gen-meth-super.js
new file mode 100644
index 0000000000..c9210159fe
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-gen-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-async-gen-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Async Generator Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static async * method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-meth-prototype.js
new file mode 100644
index 0000000000..2bddcc2c09
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-meth-prototype.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-async-meth-prototype.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Async Methods cannot be named prototype (class expression)
+esid: prod-ClassElement
+features: [async-functions, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static async prototype() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-meth-super.js
new file mode 100644
index 0000000000..aa40e45b51
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-async-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-async-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Async Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [async-functions, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static async method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-gen-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-gen-meth-prototype.js
new file mode 100644
index 0000000000..9a596bc853
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-gen-meth-prototype.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-gen-meth-prototype.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Generator Methods cannot be named prototype (class expression)
+esid: prod-ClassElement
+features: [generators, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static * prototype() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-gen-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-gen-meth-super.js
new file mode 100644
index 0000000000..def3cb1572
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-gen-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-gen-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Generator Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [generators, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static * method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-get-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-get-meth-prototype.js
new file mode 100644
index 0000000000..554b88539b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-get-meth-prototype.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-get-meth-prototype.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Accessor get Methods cannot be named prototype (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static get prototype() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-get-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-get-meth-super.js
new file mode 100644
index 0000000000..5a8909c4e3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-get-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-get-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Accessor get Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static get method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-meth-prototype.js
new file mode 100644
index 0000000000..6db6567c1a
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-meth-prototype.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-meth-prototype.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Methods cannot be named prototype (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static prototype() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-meth-super.js
new file mode 100644
index 0000000000..caf2ae5f50
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-gen-meth-constructor.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-gen-meth-constructor.js
new file mode 100644
index 0000000000..92f086b6a5
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-gen-meth-constructor.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-async-gen-meth-constructor.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Async Generator Private Methods cannot be named constructor (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElementName : PrivateName ;
+        It is a Syntax Error if StringValue of PrivateName is "#constructor"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static async * #constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-gen-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-gen-meth-super.js
new file mode 100644
index 0000000000..c1719b9215
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-gen-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-async-gen-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Async Generator Private Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static async * #method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-meth-constructor.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-meth-constructor.js
new file mode 100644
index 0000000000..b49bbf5cab
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-meth-constructor.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-async-meth-constructor.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Async Private Methods cannot be named constructor (class expression)
+esid: prod-ClassElement
+features: [async-functions, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElementName : PrivateName ;
+        It is a Syntax Error if StringValue of PrivateName is "#constructor"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static async #constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-meth-super.js
new file mode 100644
index 0000000000..832a75fa7d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-async-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-async-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Async Private Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [async-functions, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static async #method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-gen-meth-constructor.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-gen-meth-constructor.js
new file mode 100644
index 0000000000..24c41d3c85
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-gen-meth-constructor.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-gen-meth-constructor.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Generator Private Methods cannot be named constructor (class expression)
+esid: prod-ClassElement
+features: [generators, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElementName : PrivateName ;
+        It is a Syntax Error if StringValue of PrivateName is "#constructor"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static * #constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-gen-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-gen-meth-super.js
new file mode 100644
index 0000000000..c6b35a444d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-gen-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-gen-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Generator Private Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [generators, class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static * #method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-meth-constructor.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-meth-constructor.js
new file mode 100644
index 0000000000..32e9274eac
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-meth-constructor.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-meth-constructor.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Private Methods cannot be named constructor (class expression)
+esid: prod-ClassElement
+features: [class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElementName : PrivateName ;
+        It is a Syntax Error if StringValue of PrivateName is "#constructor"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static #constructor() {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-meth-super.js
new file mode 100644
index 0000000000..fe96b06914
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-private-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Private Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [class-static-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static #method() {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-privatename-constructor.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-privatename-constructor.js
new file mode 100644
index 0000000000..ef424f652f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-privatename-constructor.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-privatename-constructor.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Private Fields cannot be named constructor (class expression)
+esid: prod-ClassElement
+features: [class-static-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElementName : PrivateName ;
+        It is a Syntax Error if StringValue of PrivateName is "#constructor"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static #constructor
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-set-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-set-meth-prototype.js
new file mode 100644
index 0000000000..b70a612536
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-set-meth-prototype.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-set-meth-prototype.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Accessor set Methods cannot be named prototype (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  static set prototype(_) {}
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-set-meth-super.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-set-meth-super.js
new file mode 100644
index 0000000000..a007d94d20
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/grammar-static-set-meth-super.js
@@ -0,0 +1,28 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-set-meth-super.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: Static Accessor set Methods cannot contain direct super (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends Function{
+  static set method(_) {
+      super();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/browser.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/browser.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-call-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-call-expression-bad-reference.js
new file mode 100644
index 0000000000..082a9c2ea1
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-call-expression-bad-reference.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-field-initializer.template
+/*---
+description: bad reference in call expression (Invalid private names should throw a SyntaxError, class field initializer in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  f = (() => {})().#x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-call-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-call-expression-this.js
new file mode 100644
index 0000000000..5ccb930ac6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-call-expression-this.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-this.case
+// - src/invalid-private-names/default/cls-expr-field-initializer.template
+/*---
+description: this evaluated in call expression (Invalid private names should throw a SyntaxError, class field initializer in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  f = (() => this)().#x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-call-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-call-expression-bad-reference.js
new file mode 100644
index 0000000000..adc3600857
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-call-expression-bad-reference.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-field-initializer-fn.template
+/*---
+description: bad reference in call expression (Invalid private names should throw a SyntaxError, function in class field initializer in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  f = function() { (() => {})().#x }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-call-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-call-expression-this.js
new file mode 100644
index 0000000000..f94e296d59
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-call-expression-this.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-this.case
+// - src/invalid-private-names/default/cls-expr-field-initializer-fn.template
+/*---
+description: this evaluated in call expression (Invalid private names should throw a SyntaxError, function in class field initializer in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  f = function() { (() => this)().#x }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-member-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-member-expression-bad-reference.js
new file mode 100644
index 0000000000..011e64fcaa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-member-expression-bad-reference.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-field-initializer-fn.template
+/*---
+description: bad reference in member expression (Invalid private names should throw a SyntaxError, function in class field initializer in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  f = function() { something.#x }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-member-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-member-expression-this.js
new file mode 100644
index 0000000000..1e94438481
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-fn-member-expression-this.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-this.case
+// - src/invalid-private-names/default/cls-expr-field-initializer-fn.template
+/*---
+description: this reference in member expression (Invalid private names should throw a SyntaxError, function in class field initializer in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  f = function() { this.#x }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-call-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-call-expression-bad-reference.js
new file mode 100644
index 0000000000..cbb5478bea
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-call-expression-bad-reference.js
@@ -0,0 +1,57 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-field-initializer-heritage.template
+/*---
+description: bad reference in call expression (Invalid private names should throw a SyntaxError, field initializer in inner class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class Parent {
+  #x = 42;
+}
+
+var C = class extends Parent {
+  f = (() => {})().#x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-call-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-call-expression-this.js
new file mode 100644
index 0000000000..fc59fbf308
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-call-expression-this.js
@@ -0,0 +1,57 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-this.case
+// - src/invalid-private-names/default/cls-expr-field-initializer-heritage.template
+/*---
+description: this evaluated in call expression (Invalid private names should throw a SyntaxError, field initializer in inner class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class Parent {
+  #x = 42;
+}
+
+var C = class extends Parent {
+  f = (() => this)().#x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-member-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-member-expression-bad-reference.js
new file mode 100644
index 0000000000..1ad9d43575
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-member-expression-bad-reference.js
@@ -0,0 +1,57 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-field-initializer-heritage.template
+/*---
+description: bad reference in member expression (Invalid private names should throw a SyntaxError, field initializer in inner class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class Parent {
+  #x = 42;
+}
+
+var C = class extends Parent {
+  f = something.#x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-member-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-member-expression-this.js
new file mode 100644
index 0000000000..88584a739d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-heritage-member-expression-this.js
@@ -0,0 +1,57 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-this.case
+// - src/invalid-private-names/default/cls-expr-field-initializer-heritage.template
+/*---
+description: this reference in member expression (Invalid private names should throw a SyntaxError, field initializer in inner class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class Parent {
+  #x = 42;
+}
+
+var C = class extends Parent {
+  f = this.#x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-member-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-member-expression-bad-reference.js
new file mode 100644
index 0000000000..9ae859e062
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-member-expression-bad-reference.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-field-initializer.template
+/*---
+description: bad reference in member expression (Invalid private names should throw a SyntaxError, class field initializer in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  f = something.#x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-member-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-member-expression-this.js
new file mode 100644
index 0000000000..7c67f5b0e0
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/field-init-member-expression-this.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-this.case
+// - src/invalid-private-names/default/cls-expr-field-initializer.template
+/*---
+description: this reference in member expression (Invalid private names should throw a SyntaxError, class field initializer in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class, class-fields-public]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  f = this.#x
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-call-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-call-expression-bad-reference.js
new file mode 100644
index 0000000000..556abc11bb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-call-expression-bad-reference.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-method.template
+/*---
+description: bad reference in call expression (Invalid private names should throw a SyntaxError, method in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() { (() => {})().#x }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-call-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-call-expression-this.js
new file mode 100644
index 0000000000..7f25a597cc
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-call-expression-this.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-this.case
+// - src/invalid-private-names/default/cls-expr-method.template
+/*---
+description: this evaluated in call expression (Invalid private names should throw a SyntaxError, method in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() { (() => this)().#x }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-call-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-call-expression-bad-reference.js
new file mode 100644
index 0000000000..3aac1ddd02
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-call-expression-bad-reference.js
@@ -0,0 +1,55 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-method-fn.template
+/*---
+description: bad reference in call expression (Invalid private names should throw a SyntaxError, inner function in method in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() {
+    function fn() { (() => {})().#x }
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-call-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-call-expression-this.js
new file mode 100644
index 0000000000..d99799a255
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-call-expression-this.js
@@ -0,0 +1,55 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-this.case
+// - src/invalid-private-names/default/cls-expr-method-fn.template
+/*---
+description: this evaluated in call expression (Invalid private names should throw a SyntaxError, inner function in method in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() {
+    function fn() { (() => this)().#x }
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-member-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-member-expression-bad-reference.js
new file mode 100644
index 0000000000..8486f6ce61
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-member-expression-bad-reference.js
@@ -0,0 +1,55 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-method-fn.template
+/*---
+description: bad reference in member expression (Invalid private names should throw a SyntaxError, inner function in method in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() {
+    function fn() { something.#x }
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-member-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-member-expression-this.js
new file mode 100644
index 0000000000..9242fe4448
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-fn-member-expression-this.js
@@ -0,0 +1,55 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-this.case
+// - src/invalid-private-names/default/cls-expr-method-fn.template
+/*---
+description: this reference in member expression (Invalid private names should throw a SyntaxError, inner function in method in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() {
+    function fn() { this.#x }
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-call-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-call-expression-bad-reference.js
new file mode 100644
index 0000000000..c599da9b62
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-call-expression-bad-reference.js
@@ -0,0 +1,59 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-method-heritage.template
+/*---
+description: bad reference in call expression (Invalid private names should throw a SyntaxError, method in inner class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class Parent {
+  #x = 42;
+}
+
+var C = class extends Parent {
+  m() {
+    (() => {})().#x
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-call-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-call-expression-this.js
new file mode 100644
index 0000000000..9e60290764
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-call-expression-this.js
@@ -0,0 +1,59 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-this.case
+// - src/invalid-private-names/default/cls-expr-method-heritage.template
+/*---
+description: this evaluated in call expression (Invalid private names should throw a SyntaxError, method in inner class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class Parent {
+  #x = 42;
+}
+
+var C = class extends Parent {
+  m() {
+    (() => this)().#x
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-member-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-member-expression-bad-reference.js
new file mode 100644
index 0000000000..02cf2dca97
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-member-expression-bad-reference.js
@@ -0,0 +1,59 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-method-heritage.template
+/*---
+description: bad reference in member expression (Invalid private names should throw a SyntaxError, method in inner class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class Parent {
+  #x = 42;
+}
+
+var C = class extends Parent {
+  m() {
+    something.#x
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-member-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-member-expression-this.js
new file mode 100644
index 0000000000..4879b83507
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-heritage-member-expression-this.js
@@ -0,0 +1,59 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-this.case
+// - src/invalid-private-names/default/cls-expr-method-heritage.template
+/*---
+description: this reference in member expression (Invalid private names should throw a SyntaxError, method in inner class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class Parent {
+  #x = 42;
+}
+
+var C = class extends Parent {
+  m() {
+    this.#x
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-member-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-member-expression-bad-reference.js
new file mode 100644
index 0000000000..2ec080e169
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-member-expression-bad-reference.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-method.template
+/*---
+description: bad reference in member expression (Invalid private names should throw a SyntaxError, method in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() { something.#x }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-member-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-member-expression-this.js
new file mode 100644
index 0000000000..13ac14d96e
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-member-expression-this.js
@@ -0,0 +1,53 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-this.case
+// - src/invalid-private-names/default/cls-expr-method.template
+/*---
+description: this reference in member expression (Invalid private names should throw a SyntaxError, method in class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() { this.#x }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-call-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-call-expression-bad-reference.js
new file mode 100644
index 0000000000..3dd3255370
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-call-expression-bad-reference.js
@@ -0,0 +1,59 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-outter-method.template
+/*---
+description: bad reference in call expression (Invalid private names should throw a SyntaxError, method in outter class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() {
+    class Outter {
+      #x = 42;
+    }
+
+    this.#x;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-call-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-call-expression-this.js
new file mode 100644
index 0000000000..13f1d684be
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-call-expression-this.js
@@ -0,0 +1,59 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/call-expression-this.case
+// - src/invalid-private-names/default/cls-expr-outter-method.template
+/*---
+description: this evaluated in call expression (Invalid private names should throw a SyntaxError, method in outter class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() {
+    class Outter {
+      #x = 42;
+    }
+
+    this.#x;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-member-expression-bad-reference.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-member-expression-bad-reference.js
new file mode 100644
index 0000000000..99c238f82c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-member-expression-bad-reference.js
@@ -0,0 +1,59 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-bad-reference.case
+// - src/invalid-private-names/default/cls-expr-outter-method.template
+/*---
+description: bad reference in member expression (Invalid private names should throw a SyntaxError, method in outter class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() {
+    class Outter {
+      #x = 42;
+    }
+
+    this.#x;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-member-expression-this.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-member-expression-this.js
new file mode 100644
index 0000000000..bf3969eada
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-member-expression-this.js
@@ -0,0 +1,59 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/invalid-private-names/member-expression-this.case
+// - src/invalid-private-names/default/cls-expr-outter-method.template
+/*---
+description: this reference in member expression (Invalid private names should throw a SyntaxError, method in outter class expression)
+esid: sec-static-semantics-early-errors
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ScriptBody:StatementList
+      It is a Syntax Error if AllPrivateNamesValid of StatementList with an empty List
+      as an argument is false unless the source code is eval code that is being
+      processed by a direct eval.
+
+    ModuleBody:ModuleItemList
+      It is a Syntax Error if AllPrivateNamesValid of ModuleItemList with an empty List
+      as an argument is false.
+
+    Static Semantics: AllPrivateNamesValid
+
+    ClassBody : ClassElementList
+    1. Let newNames be the concatenation of names with PrivateBoundNames of ClassBody.
+    2. Return AllPrivateNamesValid of ClassElementList with the argument newNames.
+
+    For all other grammatical productions, recurse on subexpressions/substatements,
+    passing in the names of the caller. If all pieces return true, then return true.
+    If any returns false, return false.
+
+
+    Static Semantics: AllPrivateNamesValid
+
+    MemberExpression : MemberExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+    CallExpression : CallExpression . PrivateName
+
+    1. If StringValue of PrivateName is in names, return true.
+    2. Return false.
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  m() {
+    class Outter {
+      #x = 42;
+    }
+
+    this.#x;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/shell.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/invalid-names/shell.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-async-generator-cannot-escape-token.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-async-generator-cannot-escape-token.js
new file mode 100644
index 0000000000..4bbf633a8f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-async-generator-cannot-escape-token.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/private-async-generator-cannot-escape-token.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: The pound signal in the private async generator cannot be escaped (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, async-iteration, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    PrivateName::
+      # IdentifierName
+
+    U+0023 is the escape sequence for #
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  async * \u0023m() { return 42; }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-async-method-cannot-escape-token.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-async-method-cannot-escape-token.js
new file mode 100644
index 0000000000..d84f14a988
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-async-method-cannot-escape-token.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/private-async-method-cannot-escape-token.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: The pound signal in the private async method cannot be escaped (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, async-functions, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    PrivateName::
+      # IdentifierName
+
+    U+0023 is the escape sequence for #
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  async \u0023m() { return 42; }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-call-exp-cannot-escape-token.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-call-exp-cannot-escape-token.js
new file mode 100644
index 0000000000..bad61fd517
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-call-exp-cannot-escape-token.js
@@ -0,0 +1,34 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/private-call-exp-cannot-escape-token.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: The pound signal in the private reference cannot be escaped (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    PrivateName ::
+      # IdentifierName
+
+    MemberExpression :
+      MemberExpression . PrivateName
+
+    CallExpression :
+      CallExpression . PrivateName
+
+    U+0023 is the escape sequence for #
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  method() {
+    foo().\u0023field;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-field-cannot-escape-token.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-field-cannot-escape-token.js
new file mode 100644
index 0000000000..9b9b745db7
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-field-cannot-escape-token.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/private-field-cannot-escape-token.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: The pound signal in the private field cannot be escaped (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    PrivateName::
+      # IdentifierName
+
+    U+0023 is the escape sequence for #
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  \u0023field;
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-generator-cannot-escape-token.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-generator-cannot-escape-token.js
new file mode 100644
index 0000000000..30b26920ea
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-generator-cannot-escape-token.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/private-generator-cannot-escape-token.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: The pound signal in the private generator cannot be escaped (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, generators, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    PrivateName::
+      # IdentifierName
+
+    U+0023 is the escape sequence for #
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  * \u0023m() { return 42; }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-member-exp-cannot-escape-token.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-member-exp-cannot-escape-token.js
new file mode 100644
index 0000000000..8e4e6d321d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-member-exp-cannot-escape-token.js
@@ -0,0 +1,34 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/private-member-exp-cannot-escape-token.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: The pound signal in the private reference cannot be escaped (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    PrivateName ::
+      # IdentifierName
+
+    MemberExpression :
+      MemberExpression . PrivateName
+
+    CallExpression :
+      CallExpression . PrivateName
+
+    U+0023 is the escape sequence for #
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  method() {
+    this.\u0023field;
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-method-cannot-escape-token.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-method-cannot-escape-token.js
new file mode 100644
index 0000000000..bfd4b3bcbd
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/private-method-cannot-escape-token.js
@@ -0,0 +1,26 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/private-method-cannot-escape-token.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: The pound signal in the private method cannot be escaped (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    PrivateName::
+      # IdentifierName
+
+    U+0023 is the escape sequence for #
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class {
+  \u0023m() { return 42; }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/shell.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/shell.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/super-private-access-invalid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/super-private-access-invalid.js
new file mode 100644
index 0000000000..9c3a577979
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/early-errors/super-private-access-invalid.js
@@ -0,0 +1,37 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/super-private-access-invalid.case
+// - src/class-elements/syntax/invalid/cls-expr-elements-invalid-syntax.template
+/*---
+description: It is syntax error if PrivateName IdentifierName is accessed on SuperProperty (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+    SuperProperty:
+      super[Expression]
+      super.IdentifierName
+
+---*/
+
+
+$DONOTEVALUATE();
+
+var C = class extends B
+{
+  #x() {}
+
+  method() {
+    super.#x();
+  }
+};
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/shell.js b/js/src/tests/test262/language/expressions/class/elements/syntax/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/shell.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/browser.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/browser.js
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-class-body-ctor-no-heritage.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-class-body-ctor-no-heritage.js
new file mode 100644
index 0000000000..92137ad521
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-class-body-ctor-no-heritage.js
@@ -0,0 +1,24 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-class-body-ctor-no-heritage.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: A constructor is valid without a super call in the constructor and heritage (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+info: |
+    ClassTail : ClassHeritageopt { ClassBody }
+
+    It is a Syntax Error if ClassHeritage is not present and the following algorithm evaluates to true:
+      1. Let constructor be ConstructorMethod of ClassBody.
+      2. If constructor is empty, return false.
+      3. Return HasDirectSuper of constructor.
+
+---*/
+
+
+var C = class {
+  constructor() {}
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-accessor.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-accessor.js
new file mode 100644
index 0000000000..88781cea5d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-accessor.js
@@ -0,0 +1,27 @@
+// |reftest| skip-if(!(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('decorators'))) -- decorators is not enabled unconditionally
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-field-accessor.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Valid accessor FieldDefinition, ClassElementName, PropertyName Syntax (class expression)
+esid: prod-ClassElement
+features: [decorators, class]
+flags: [generated]
+info: |
+    FieldDefinition[Yield, Await] :
+      ClassElementName[?Yield, ?Await] Initializer[+In, ?Yield, ?Await]opt
+      accessor [no LineTerminator here] ClassElementName[?Yield, ?Await] Initializer[+In, ?Yield, ?Await]opt
+
+---*/
+
+
+var C = class {
+  accessor $;
+  accessor _;
+  accessor \u{6F};
+  accessor \u2118;
+  accessor ZW_\u200C_NJ;
+  accessor ZW_\u200D_J;
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-classelementname-initializer-alt.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-classelementname-initializer-alt.js
new file mode 100644
index 0000000000..1a731074d3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-classelementname-initializer-alt.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-field-classelementname-initializer-alt.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: FieldDefinition, ClassElementName, PropertyName = Initializer Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+info: |
+    ClassElement :
+      ...
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PropertyName :
+      LiteralPropertyName
+      ComputedPropertyName
+
+    LiteralPropertyName :
+      IdentifierName
+
+    Initializer :
+      = AssignmentExpression
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart ::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart ::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue ::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+var C = class {
+  $ = 1;
+  _ = 2;
+  \u{6F} = 3;
+  ℘ = 4;      // DO NOT CHANGE THE NAME OF THIS FIELD
+  ZW_‌_NJ = 5; // DO NOT CHANGE THE NAME OF THIS FIELD
+  ZW_‍_J = 6;  // DO NOT CHANGE THE NAME OF THIS FIELD
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-classelementname-initializer.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-classelementname-initializer.js
new file mode 100644
index 0000000000..f26a8180ce
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-classelementname-initializer.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-field-classelementname-initializer.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: FieldDefinition, ClassElementName, PropertyName = Initializer Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+info: |
+    ClassElement :
+      ...
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PropertyName :
+      LiteralPropertyName
+      ComputedPropertyName
+
+    LiteralPropertyName :
+      IdentifierName
+
+    Initializer :
+      = AssignmentExpression
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart ::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart ::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue ::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+var C = class {
+  $ = 1;
+  _ = 2;
+  \u{6F} = 3;
+  \u2118 = 4;
+  ZW_\u200C_NJ = 5;
+  ZW_\u200D_J = 6;
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-identifier-alt.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-identifier-alt.js
new file mode 100644
index 0000000000..fab559ecee
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-identifier-alt.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-field-identifier-alt.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Valid FieldDefinition, ClassElementName, PropertyName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PropertyName :
+      LiteralPropertyName
+      ComputedPropertyName
+
+    LiteralPropertyName :
+      IdentifierName
+      StringLiteral
+      NumericLiteral
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart ::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart ::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue ::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+var C = class {
+  $;
+  _;
+  \u{6F};
+  ℘;      // DO NOT CHANGE THE NAME OF THIS FIELD
+  ZW_‌_NJ; // DO NOT CHANGE THE NAME OF THIS FIELD
+  ZW_‍_J;  // DO NOT CHANGE THE NAME OF THIS FIELD
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-identifier.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-identifier.js
new file mode 100644
index 0000000000..5557474be6
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-field-identifier.js
@@ -0,0 +1,72 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-field-identifier.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Valid FieldDefinition, ClassElementName, PropertyName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PropertyName :
+      LiteralPropertyName
+      ComputedPropertyName
+
+    LiteralPropertyName :
+      IdentifierName
+      StringLiteral
+      NumericLiteral
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart ::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart ::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue ::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+var C = class {
+  $;
+  _;
+  \u{6F};
+  \u2118;
+  ZW_\u200C_NJ;
+  ZW_\u200D_J;
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-fields-multi-line.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-fields-multi-line.js
new file mode 100644
index 0000000000..9843ba163f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-fields-multi-line.js
@@ -0,0 +1,31 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-fields-multi-line.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Valid multi-line, multi-field (class expression)
+esid: prod-ClassElement
+features: [class-fields-public, class]
+flags: [generated]
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+---*/
+
+
+var C = class {
+  x
+  y
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatemeth-duplicate-get-set.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatemeth-duplicate-get-set.js
new file mode 100644
index 0000000000..586be0b345
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatemeth-duplicate-get-set.js
@@ -0,0 +1,23 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-get-set.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: It's valid if a class contains a private getter and a private setter with the same name (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+var C = class {
+  get #m() {}
+  set #m(_) {}
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatemeth-duplicate-meth-nestedclassmeth.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatemeth-duplicate-meth-nestedclassmeth.js
new file mode 100644
index 0000000000..87191f4f91
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatemeth-duplicate-meth-nestedclassmeth.js
@@ -0,0 +1,28 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatemeth-duplicate-meth-nestedclassmeth.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: It's valid if a nested class shadows a private method (class expression)
+esid: prod-ClassElement
+features: [class-methods-private, class]
+flags: [generated]
+info: |
+    Static Semantics: Early Errors
+
+    ClassBody : ClassElementList
+        It is a Syntax Error if PrivateBoundNames of ClassBody contains any duplicate entries, unless the name is used once for a getter and once for a setter and in no other entries.
+
+---*/
+
+
+var C = class {
+  constructor() {
+    class B {
+      #m() {}
+    }
+  }
+
+  #m() {}
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-classelementname-initializer-alt.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-classelementname-initializer-alt.js
new file mode 100644
index 0000000000..d62420cadf
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-classelementname-initializer-alt.js
@@ -0,0 +1,69 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-classelementname-initializer-alt.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Valid PrivateName = Initializer Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+    Initializer :
+      = AssignmentExpression
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+var C = class {
+  #$ = 1;
+  #_ = 2;
+  #\u{6F} = 3;
+  #℘ = 4;      // DO NOT CHANGE THE NAME OF THIS FIELD
+  #ZW_‌_NJ = 5; // DO NOT CHANGE THE NAME OF THIS FIELD
+  #ZW_‍_J = 6;  // DO NOT CHANGE THE NAME OF THIS FIELD
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-classelementname-initializer.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-classelementname-initializer.js
new file mode 100644
index 0000000000..590f8b3cfa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-classelementname-initializer.js
@@ -0,0 +1,69 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-classelementname-initializer.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Valid PrivateName = Initializer Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+    Initializer :
+      = AssignmentExpression
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+var C = class {
+  #$ = 1;
+  #_ = 2;
+  #\u{6F} = 3;
+  #\u2118 = 4;
+  #ZW_\u200C_NJ = 5;
+  #ZW_\u200D_J = 6;
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-identifier.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-identifier.js
new file mode 100644
index 0000000000..380dbe7f97
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-identifier.js
@@ -0,0 +1,66 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-identifier.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Valid PrivateName Syntax (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+    IdentifierName ::
+      IdentifierStart
+      IdentifierName IdentifierPart
+
+    IdentifierStart ::
+      UnicodeIDStart
+      $
+      _
+      \ UnicodeEscapeSequence
+
+    IdentifierPart::
+      UnicodeIDContinue
+      $
+      \ UnicodeEscapeSequence
+      <ZWNJ> <ZWJ>
+
+    UnicodeIDStart::
+      any Unicode code point with the Unicode property "ID_Start"
+
+    UnicodeIDContinue::
+      any Unicode code point with the Unicode property "ID_Continue"
+
+
+    NOTE 3
+    The sets of code points with Unicode properties "ID_Start" and
+    "ID_Continue" include, respectively, the code points with Unicode
+    properties "Other_ID_Start" and "Other_ID_Continue".
+
+---*/
+
+
+var C = class {
+  #$;
+  #_;
+  #\u{6F};
+  #\u2118;
+  #ZW_\u200C_NJ;
+  #ZW_\u200D_J;
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-no-initializer-with-method.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-no-initializer-with-method.js
new file mode 100644
index 0000000000..d5a422aa4b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatename-no-initializer-with-method.js
@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatename-no-initializer-with-method.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: SyntaxError (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+var C = class {
+  #x
+  m() {}
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatenames-multi-line.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatenames-multi-line.js
new file mode 100644
index 0000000000..7f2f654bc2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-privatenames-multi-line.js
@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-privatenames-multi-line.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: SyntaxError (class expression)
+esid: prod-ClassElement
+features: [class-fields-private, class]
+flags: [generated]
+info: |
+    ClassElement :
+      MethodDefinition
+      static MethodDefinition
+      FieldDefinition ;
+      ;
+
+    FieldDefinition :
+      ClassElementName Initializer _opt
+
+    ClassElementName :
+      PropertyName
+      PrivateName
+
+    PrivateName ::
+      # IdentifierName
+
+---*/
+
+
+var C = class {
+  #x
+  #y
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-accessor-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-accessor-meth-valid.js
new file mode 100644
index 0000000000..5ef5f9b3d3
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-accessor-meth-valid.js
@@ -0,0 +1,58 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-prototype-accessor-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Accessor Methods can be named "prototype" (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage_opt { ClassBody_opt }
+
+    [...]
+    6. Let proto be OrdinaryObjectCreate(protoParent).
+    [...]
+    14. Perform MakeConstructor(F, false, proto).
+    [...]
+    20. For each ClassElement m in order from methods, do
+        a. If IsStatic of m is false, then
+            i. Let status be PropertyDefinitionEvaluation of m with arguments proto and false.
+    [...]
+
+    Runtime Semantics: PropertyDefinitionEvaluation
+
+    With parameters object and enumerable.
+
+    MethodDefinition : get PropertyName ( ) { FunctionBody }
+
+    [...]
+    9. Let desc be the PropertyDescriptor { [[Get]]: closure, [[Enumerable]]: enumerable, [[Configurable]]: true }.
+    10. Return ? DefinePropertyOrThrow(object, propKey, desc).
+
+    MethodDefinition : set PropertyName ( PropertySetParameterList ) { FunctionBody }
+
+    [...]
+    8. Let desc be the PropertyDescriptor { [[Set]]: closure, [[Enumerable]]: enumerable, [[Configurable]]: true }.
+    9. Return ? DefinePropertyOrThrow(object, propKey, desc).
+
+---*/
+
+
+var C = class {
+  get prototype() { return 13; }
+  set prototype(_) {}
+};
+
+assert(C.hasOwnProperty('prototype'));
+assert(C.prototype.hasOwnProperty('prototype'));
+assert.notSameValue(C.prototype.prototype, C.prototype);
+assert.sameValue(C.prototype.prototype, 13);
+verifyProperty(C.prototype, 'prototype', {
+    enumerable: false,
+    configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-async-gen-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-async-gen-meth-valid.js
new file mode 100644
index 0000000000..fc5e1bfacd
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-async-gen-meth-valid.js
@@ -0,0 +1,51 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-prototype-async-gen-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Async Generator Methods can be named "prototype" (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage_opt { ClassBody_opt }
+
+    [...]
+    6. Let proto be OrdinaryObjectCreate(protoParent).
+    [...]
+    14. Perform MakeConstructor(F, false, proto).
+    [...]
+    20. For each ClassElement m in order from methods, do
+        a. If IsStatic of m is false, then
+            i. Let status be PropertyDefinitionEvaluation of m with arguments proto and false.
+    [...]
+
+    Runtime Semantics: PropertyDefinitionEvaluation
+
+    With parameters object and enumerable.
+
+    AsyncGeneratorMethod : async * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
+
+    [...]
+    10. Let desc be PropertyDescriptor { [[Value]]: closure, [[Writable]]: true, [[Enumerable]]: enumerable, [[Configurable]]: true }.
+    11. Return ? DefinePropertyOrThrow(object, propKey, desc).
+
+---*/
+
+
+var C = class {
+  async * prototype() {}
+};
+
+assert(C.hasOwnProperty('prototype'));
+assert(C.prototype.hasOwnProperty('prototype'));
+assert.notSameValue(C.prototype.prototype, C.prototype);
+verifyProperty(C.prototype, 'prototype', {
+    writable: true,
+    enumerable: false,
+    configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-async-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-async-meth-valid.js
new file mode 100644
index 0000000000..f6e24e4aff
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-async-meth-valid.js
@@ -0,0 +1,51 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-prototype-async-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Async Methods can be named "prototype" (class expression)
+esid: prod-ClassElement
+features: [async-functions, class]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage_opt { ClassBody_opt }
+
+    [...]
+    6. Let proto be OrdinaryObjectCreate(protoParent).
+    [...]
+    14. Perform MakeConstructor(F, false, proto).
+    [...]
+    20. For each ClassElement m in order from methods, do
+        a. If IsStatic of m is false, then
+            i. Let status be PropertyDefinitionEvaluation of m with arguments proto and false.
+    [...]
+
+    Runtime Semantics: PropertyDefinitionEvaluation
+
+    With parameters object and enumerable.
+
+    AsyncMethod : async PropertyName ( UniqueFormalParameters ) { AsyncFunctionBody }
+
+    [...]
+    8. Let desc be the PropertyDescriptor { [[Value]]: closure, [[Writable]]: true, [[Enumerable]]: enumerable, [[Configurable]]: true }.
+    9. Return ? DefinePropertyOrThrow(object, propKey, desc).
+
+---*/
+
+
+var C = class {
+  async prototype() {}
+};
+
+assert(C.hasOwnProperty('prototype'));
+assert(C.prototype.hasOwnProperty('prototype'));
+assert.notSameValue(C.prototype.prototype, C.prototype);
+verifyProperty(C.prototype, 'prototype', {
+    writable: true,
+    enumerable: false,
+    configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-gen-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-gen-meth-valid.js
new file mode 100644
index 0000000000..83676bd5ca
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-gen-meth-valid.js
@@ -0,0 +1,51 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-prototype-gen-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Generator Methods can be named "prototype" (class expression)
+esid: prod-ClassElement
+features: [generators, class]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage_opt { ClassBody_opt }
+
+    [...]
+    6. Let proto be OrdinaryObjectCreate(protoParent).
+    [...]
+    14. Perform MakeConstructor(F, false, proto).
+    [...]
+    20. For each ClassElement m in order from methods, do
+        a. If IsStatic of m is false, then
+            i. Let status be PropertyDefinitionEvaluation of m with arguments proto and false.
+    [...]
+
+    Runtime Semantics: PropertyDefinitionEvaluation
+
+    With parameters object and enumerable.
+
+    GeneratorMethod : * PropertyName ( UniqueFormalParameters ) { GeneratorBody }
+
+    [...]
+    10. Let desc be the PropertyDescriptor { [[Value]]: closure, [[Writable]]: true, [[Enumerable]]: enumerable, [[Configurable]]: true }.
+    11. Return ? DefinePropertyOrThrow(object, propKey, desc).
+
+---*/
+
+
+var C = class {
+  * prototype() {}
+};
+
+assert(C.hasOwnProperty('prototype'));
+assert(C.prototype.hasOwnProperty('prototype'));
+assert.notSameValue(C.prototype.prototype, C.prototype);
+verifyProperty(C.prototype, 'prototype', {
+    writable: true,
+    enumerable: false,
+    configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-meth-valid.js
new file mode 100644
index 0000000000..790bb30409
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-special-prototype-meth-valid.js
@@ -0,0 +1,51 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-special-prototype-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Methods can be named "prototype" (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+includes: [propertyHelper.js]
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage_opt { ClassBody_opt } 
+
+    [...]
+    6. Let proto be OrdinaryObjectCreate(protoParent).
+    [...]
+    14. Perform MakeConstructor(F, false, proto).
+    [...]
+    20. For each ClassElement m in order from methods, do
+        a. If IsStatic of m is false, then
+            i. Let status be PropertyDefinitionEvaluation of m with arguments proto and false.
+    [...]
+
+    Runtime Semantics: PropertyDefinitionEvaluation
+
+    With parameters object and enumerable.
+
+    MethodDefinition : PropertyName ( UniqueFormalParameters ) { FunctionBody }
+
+    [...]
+    3. Let desc be the PropertyDescriptor { [[Value]]: methodDef.[[Closure]], [[Writable]]: true, [[Enumerable]]: enumerable, [[Configurable]]: true }.
+    4. Return ? DefinePropertyOrThrow(object, methodDef.[[Key]], desc).
+
+---*/
+
+
+var C = class {
+  prototype() {}
+};
+
+assert(C.hasOwnProperty('prototype'));
+assert(C.prototype.hasOwnProperty('prototype'));
+assert.notSameValue(C.prototype.prototype, C.prototype);
+verifyProperty(C.prototype, 'prototype', {
+    writable: true,
+    enumerable: false,
+    configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-accessor-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-accessor-meth-valid.js
new file mode 100644
index 0000000000..6efb50847b
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-accessor-meth-valid.js
@@ -0,0 +1,32 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-ctor-accessor-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Accessor Methods can be named constructor (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "prototype".
+
+---*/
+
+
+var C = class {
+  static get constructor() {}
+  static set constructor(_) {}
+  constructor() {} // stacks with a valid constructor
+};
+
+assert(C.hasOwnProperty('constructor'));
+assert(C.prototype.hasOwnProperty('constructor'));
+assert.notSameValue(C.prototype.constructor, C.constructor);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-async-gen-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-async-gen-meth-valid.js
new file mode 100644
index 0000000000..2689f31801
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-async-gen-meth-valid.js
@@ -0,0 +1,31 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-ctor-async-gen-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Async Generator Methods can be named constructor (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "prototype".
+
+---*/
+
+
+var C = class {
+  static async * constructor() {}
+  constructor() {} // stacks with a valid constructor
+};
+
+assert(C.hasOwnProperty('constructor'));
+assert(C.prototype.hasOwnProperty('constructor'));
+assert.notSameValue(C.prototype.constructor, C.constructor);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-async-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-async-meth-valid.js
new file mode 100644
index 0000000000..757b3a45db
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-async-meth-valid.js
@@ -0,0 +1,31 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-ctor-async-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Methods can be named constructor (class expression)
+esid: prod-ClassElement
+features: [async-functions, class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "prototype".
+
+---*/
+
+
+var C = class {
+  static async constructor() {}
+  constructor() {} // stacks with a valid constructor
+};
+
+assert(C.hasOwnProperty('constructor'));
+assert(C.prototype.hasOwnProperty('constructor'));
+assert.notSameValue(C.prototype.constructor, C.constructor);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-gen-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-gen-meth-valid.js
new file mode 100644
index 0000000000..af241a4866
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-gen-meth-valid.js
@@ -0,0 +1,31 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-ctor-gen-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Generator Methods can be named constructor (class expression)
+esid: prod-ClassElement
+features: [generators, class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "prototype".
+
+---*/
+
+
+var C = class {
+  static * constructor() {}
+  constructor() {} // stacks with a valid constructor
+};
+
+assert(C.hasOwnProperty('constructor'));
+assert(C.prototype.hasOwnProperty('constructor'));
+assert.notSameValue(C.prototype.constructor, C.constructor);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-meth-valid.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-meth-valid.js
new file mode 100644
index 0000000000..41908e065d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-ctor-meth-valid.js
@@ -0,0 +1,31 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-ctor-meth-valid.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Methods can be named constructor (class expression)
+esid: prod-ClassElement
+features: [class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is not "constructor" and HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "constructor" and SpecialMethod of MethodDefinition is true.
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if HasDirectSuper of MethodDefinition is true.
+        It is a Syntax Error if PropName of MethodDefinition is "prototype".
+
+---*/
+
+
+var C = class {
+  static constructor() {}
+  constructor() {} // stacks with a valid constructor
+};
+
+assert(C.hasOwnProperty('constructor'));
+assert(C.prototype.hasOwnProperty('constructor'));
+assert.notSameValue(C.prototype.constructor, C.constructor);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-async-gen-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-async-gen-meth-prototype.js
new file mode 100644
index 0000000000..a0cc8261ff
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-async-gen-meth-prototype.js
@@ -0,0 +1,22 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-async-gen-meth-prototype.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Async Generator Private Methods can be named "#prototype" (class expression)
+esid: prod-ClassElement
+features: [async-iteration, class-static-methods-private, class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+var C = class {
+  static async * #prototype() {}
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-async-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-async-meth-prototype.js
new file mode 100644
index 0000000000..d7be0ccaaa
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-async-meth-prototype.js
@@ -0,0 +1,22 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-async-meth-prototype.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Async Private Methods can be named "#prototype" (class expression)
+esid: prod-ClassElement
+features: [async-functions, class-static-methods-private, class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+var C = class {
+  static async #prototype() {}
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-gen-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-gen-meth-prototype.js
new file mode 100644
index 0000000000..ae0b509dcb
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-gen-meth-prototype.js
@@ -0,0 +1,22 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-gen-meth-prototype.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Generator Private Methods can be named "#prototype" (class expression)
+esid: prod-ClassElement
+features: [generators, class-static-methods-private, class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+var C = class {
+  static * #prototype() {}
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-meth-prototype.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-meth-prototype.js
new file mode 100644
index 0000000000..a2b8e5950f
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/grammar-static-private-meth-prototype.js
@@ -0,0 +1,22 @@
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-static-private-meth-prototype.case
+// - src/class-elements/syntax/valid/cls-expr-elements-valid-syntax.template
+/*---
+description: Static Private Methods can be named "#prototype" (class expression)
+esid: prod-ClassElement
+features: [class-static-methods-private, class]
+flags: [generated]
+info: |
+    Class Definitions / Static Semantics: Early Errors
+
+    ClassElement : static MethodDefinition
+        It is a Syntax Error if PropName of MethodDefinition is "prototype"
+
+---*/
+
+
+var C = class {
+  static #prototype() {}
+};
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/language/expressions/class/elements/syntax/valid/shell.js b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/class/elements/syntax/valid/shell.js