diff --git a/test/MC/ELF/nocompression.s b/test/MC/ELF/nocompression.s
index c584e181df0..97b5a8832ed 100644
--- a/test/MC/ELF/nocompression.s
+++ b/test/MC/ELF/nocompression.s
@@ -1,4 +1,4 @@
-// RUN: llvm-mc -filetype=obj -compress-debug-sections -triple x86_64-pc-linux-gnu %s -o - 2>&1 | FileCheck %s
+// RUN: not llvm-mc -filetype=obj -compress-debug-sections -triple x86_64-pc-linux-gnu %s -o - 2>&1 | FileCheck %s
 
 // REQUIRES: nozlib