diff --git a/clang/test/Driver/save-temps.c b/clang/test/Driver/save-temps.c
--- a/clang/test/Driver/save-temps.c
+++ b/clang/test/Driver/save-temps.c
@@ -83,9 +83,9 @@
 // CHECK-SAVE-TEMPS: "-cc1as"
 // CHECK-SAVE-TEMPS: "-dwarf-version={{.}}"
 
-// RUN: %clang --target=arm-arm-none-eabi -march=armv8-m.main -mcmse -save-temps -c -v %s 2>&1 \
+// RUN: %clang --target=arm-arm-none-eabi -march=armv8-m.main -mcmse -save-temps -c -v %s -### 2>&1 \
 // RUN:   | FileCheck %s -check-prefix=CHECK-SAVE-TEMPS-CMSE
-// RUN: %clang --target=arm-arm-none-eabi -march=armv8-m.main -mcmse -x assembler -c -v %s 2>&1 \
+// RUN: %clang --target=arm-arm-none-eabi -march=armv8-m.main -mcmse -x assembler -c -v %s -### 2>&1 \
 // RUN:   | FileCheck %s -check-prefix=CHECK-SAVE-TEMPS-CMSE
 // CHECK-SAVE-TEMPS-CMSE: -cc1as
 // CHECK-SAVE-TEMPS-CMSE: +8msecext