diff --git a/clang/test/Preprocessor/undef-error.c b/clang/test/Preprocessor/undef-error.c
index af9f516f11ce..a2769345babf 100644
--- a/clang/test/Preprocessor/undef-error.c
+++ b/clang/test/Preprocessor/undef-error.c
@@ -1,5 +1,5 @@
-// RUN: not clang %s -pedantic-errors -E
+// RUN: clang %s -pedantic-errors -verify 
 // PR2045
 
 #define b
-#undef a b
+/* expected-error {{extra tokens at end of #undef directive}} */ #undef a b