diff --git a/test/Analysis/BasicAA/modref.ll b/test/Analysis/BasicAA/modref.ll
index aaf0b035532..acf439ff508 100644
--- a/test/Analysis/BasicAA/modref.ll
+++ b/test/Analysis/BasicAA/modref.ll
@@ -1,3 +1,6 @@
+; A very rudimentary test on AliasAnalysis::getModRefInfo.
+; RUN: llvm-as < %s | opt -print-all-alias-modref-info -aa-eval -disable-output
+&&
 ; RUN: llvm-as < %s | opt -print-all-alias-modref-info -aa-eval -disable-output 2>&1 | not grep NoModRef
 
 int %callee() {