diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 1727ed93822b1b..40f77266fabdca 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -4042,7 +4042,7 @@ void UnwrappedLineParser::parseRecord(bool ParseAsExpr) {
   }
 
   auto IsListInitialization = [&] {
-    if (!ClassName || IsDerived)
+    if (!ClassName || IsDerived || JSPastExtendsOrImplements)
       return false;
     assert(FormatTok->is(tok::l_brace));
     const auto *Prev = FormatTok->getPreviousNonComment();
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index c25228a69a748f..57c021c76867f7 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -579,12 +579,17 @@ TEST_F(FormatTestJS, GoogScopes) {
                "});");
 }
 
-TEST_F(FormatTestJS, GoogAnonymousClass) {
+TEST_F(FormatTestJS, ClassExtends) {
   verifyFormat("a = class extends goog.structs.a {\n"
                "  a() {\n"
                "    return 0;\n"
                "  }\n"
                "};");
+  verifyFormat("a = class Foo extends goog.structs.a {\n"
+               "  a() {\n"
+               "    return 0;\n"
+               "  }\n"
+               "};");
 }
 
 TEST_F(FormatTestJS, IIFEs) {