diff --git a/llvm/test/tools/llvm-profdata/invalid-profdata.test b/llvm/test/tools/llvm-profdata/invalid-profdata.test
index b6391b03464a..4d6936f8a329 100644
--- a/llvm/test/tools/llvm-profdata/invalid-profdata.test
+++ b/llvm/test/tools/llvm-profdata/invalid-profdata.test
@@ -20,7 +20,7 @@ RUN: echo "f2:0"                                         >> %t.input
 RUN: echo "1"                                            >> %t.input
 RUN: echo ":10"                                          >> %t.input
 
-RUN: not llvm-profdata merge %t.input -text -output=/dev/null 2>&1  | FileCheck %s --check-prefix=BROKEN
+RUN: not llvm-profdata merge %t.input -text -o /dev/null 2>&1  | FileCheck %s --check-prefix=BROKEN
 BROKEN: Malformed instrumentation profile data
 
 RUN: echo ":ir"                     > %t.input