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diff --git a/js/src/tests/test262/annexB/language/global-code/if-decl-else-decl-b-global-existing-var-update.js b/js/src/tests/test262/annexB/language/global-code/if-decl-else-decl-b-global-existing-var-update.js
new file mode 100644
index 0000000000..017c3a2df5
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+++ b/js/src/tests/test262/annexB/language/global-code/if-decl-else-decl-b-global-existing-var-update.js
@@ -0,0 +1,40 @@
+// This file was procedurally generated from the following sources:
+// - src/annex-b-fns/global-existing-var-update.case
+// - src/annex-b-fns/global/if-decl-else-decl-b.template
+/*---
+description: Variable-scoped binding is updated following evaluation (IfStatement with a declaration in both statement positions in the global scope)
+esid: sec-functiondeclarations-in-ifstatement-statement-clauses
+flags: [generated, noStrict]
+info: |
+    The following rules for IfStatement augment those in 13.6:
+
+    IfStatement[Yield, Return]:
+        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else Statement[?Yield, ?Return]
+        if ( Expression[In, ?Yield] ) Statement[?Yield, ?Return] else FunctionDeclaration[?Yield]
+        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else FunctionDeclaration[?Yield]
+        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield]
+
+
+    B.3.3.2 Changes to GlobalDeclarationInstantiation
+    [...]
+    c. When the FunctionDeclaration f is evaluated, perform the following steps
+       in place of the FunctionDeclaration Evaluation algorithm provided in
+       14.1.21:
+
+       i. Let genv be the running execution context's VariableEnvironment.
+       ii. Let genvRec be genv's EnvironmentRecord.
+       ii. Let benv be the running execution context's LexicalEnvironment.
+       iv. Let benvRec be benv's EnvironmentRecord.
+       v. Let fobj be ! benvRec.GetBindingValue(F, false).
+       vi. Perform ? genvRec.SetMutableBinding(F, fobj, false).
+       vii. Return NormalCompletion(empty).
+---*/
+
+if (false) function _f() {} else function f() { return 'function declaration'; }
+
+assert.sameValue(typeof f, 'function');
+assert.sameValue(f(), 'function declaration');
+
+var f = 123;
+
+reportCompare(0, 0);