diff --git a/src/google/protobuf/editions/codegen_tests/proto2_group.proto b/src/google/protobuf/editions/codegen_tests/proto2_group.proto
index 95b86e71c2..8d807a09fd 100644
--- a/src/google/protobuf/editions/codegen_tests/proto2_group.proto
+++ b/src/google/protobuf/editions/codegen_tests/proto2_group.proto
@@ -12,7 +12,7 @@ package protobuf_editions_test.proto2;
 // LINT: ALLOW_GROUPS
 
 message Proto2Group {
-  optional group GroupField = 2 {
+  optional group Groupfield = 2 {
     optional int32 int32_field = 1;
   }
 }