2 files changed, 28 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/source/issue-4791/buggy.rs b/src/tools/rustfmt/tests/source/issue-4791/buggy.rs
new file mode 100644
index 000000000..4760022ee
--- /dev/null
+++ b/src/tools/rustfmt/tests/source/issue-4791/buggy.rs
@@ -0,0 +1,14 @@
+// rustfmt-struct_field_align_threshold: 30
+// rustfmt-trailing_comma: Never
+
+struct Foo {
+    group_a: u8,
+
+    group_b: u8,
+}
+
+struct Bar {
+    group_a: u8,
+
+    group_b: u8
+}
diff --git a/src/tools/rustfmt/tests/source/issue-4791/trailing_comma.rs b/src/tools/rustfmt/tests/source/issue-4791/trailing_comma.rs
new file mode 100644
index 000000000..c56c70fae
--- /dev/null
+++ b/src/tools/rustfmt/tests/source/issue-4791/trailing_comma.rs
@@ -0,0 +1,14 @@
+// rustfmt-struct_field_align_threshold: 30
+// rustfmt-trailing_comma: Always
+
+struct Foo {
+    group_a: u8,
+
+    group_b: u8
+}
+
+struct Bar {
+    group_a: u8,
+
+    group_b: u8,
+}