diff --git a/clang/test/Modules/ambiguous-anonymous-enum-lookup.cpp b/clang/test/Modules/ambiguous-anonymous-enum-lookup.cpp
new file mode 100644
--- /dev/null
+++ b/clang/test/Modules/ambiguous-anonymous-enum-lookup.cpp
@@ -0,0 +1,41 @@
+// RUN: rm -rf %t
+// RUN: split-file %s %t
+// RUN: %clang_cc1 -fsyntax-only -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/modules.cache -I %t/include %t/test.cpp -verify
+
+//--- include/textual.h
+#ifndef TEXTUAL_H
+#define TEXTUAL_H
+
+enum {
+  kAnonymousEnumValue = 0,
+};
+
+#endif
+
+//--- include/empty.h
+// empty
+
+//--- include/initially_hidden.h
+#include <textual.h>
+
+//--- include/module.modulemap
+module Piecewise {
+  module Empty {
+    header "empty.h"
+    export *
+  }
+  module InitiallyHidden {
+    header "initially_hidden.h"
+    export *
+  }
+}
+
+//--- test.cpp
+#include <empty.h>
+#include <textual.h>
+#include <initially_hidden.h>
+
+// expected-no-diagnostics
+int testReferencingAnonymousEnumConstant() {
+  return kAnonymousEnumValue;
+}