diff --git a/llvm/lib/Fuzzer/test/fuzzer.test b/llvm/lib/Fuzzer/test/fuzzer.test
index d826fd72567e..a38e6a208eca 100644
--- a/llvm/lib/Fuzzer/test/fuzzer.test
+++ b/llvm/lib/Fuzzer/test/fuzzer.test
@@ -57,6 +57,6 @@ SINGLE_INPUTS: LLVMFuzzer-SimpleTest: Running 2 inputs.
 SINGLE_INPUTS: aaa:
 SINGLE_INPUTS: bbb:
 
-RUN: LLVMFuzzer-LeakTest -runs=10 2>&1 | FileCheck %s --check-prefix=LEAK
+RUN: not LLVMFuzzer-LeakTest -runs=10 2>&1 | FileCheck %s --check-prefix=LEAK
 LEAK: ERROR: LeakSanitizer: detected memory leaks
 LEAK-NOT: DEATH: