diff --git a/test/Sema/forward-class-1.m b/test/Sema/forward-class-1.m
index 4e4e319..2b9369b 100644
--- a/test/Sema/forward-class-1.m
+++ b/test/Sema/forward-class-1.m
@@ -1,3 +1,5 @@
+// RUN: clang -fsyntax-only -verify %s
+
 @class FOO, BAR;
 @class FOO, BAR;