diff --git a/test/Sema/floating-point-compare.c b/test/Sema/floating-point-compare.c
index 6238891..cc96be0 100644
--- a/test/Sema/floating-point-compare.c
+++ b/test/Sema/floating-point-compare.c
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify %s
+// RUN: clang -fsyntax-only -Wfloat-equal -verify %s
 
 int foo(float x, float y) {
   return x == y; // expected-warning {{comparing floating point with ==}}