diff --git a/llvm/test/tools/llvm-dwarfdump/X86/output.s b/llvm/test/tools/llvm-dwarfdump/X86/output.s
--- a/llvm/test/tools/llvm-dwarfdump/X86/output.s
+++ b/llvm/test/tools/llvm-dwarfdump/X86/output.s
@@ -12,10 +12,10 @@
 ^M
 # RUN: touch %t3.txt^M
 # RUN: chmod 444 %t3.txt^M
-# RUN: not llvm-dwarfdump -o=%t3.txt %t.o 2>&1 | FileCheck %s  --check-prefix=ERROR1 -DFILE=%t3.txt^M
+# RUN: not llvm-dwarfdump -o=%t3.txt %t.o 2>&1 | FileCheck %s  --check-prefix=ERROR1 -DFILE=%t3.txt -DMSG=%errc_EACCES^M
 ^M
-# RUN: not llvm-dwarfdump -o= %t.o 2>&1 | FileCheck %s  --check-prefix=ERROR2^M
+# RUN: not llvm-dwarfdump -o= %t.o 2>&1 | FileCheck %s  --check-prefix=ERROR2 -DMSG=%errc_ENOENT^M
 ^M
 # CHECK: DW_TAG_compile_unit^M
-# ERROR1: unable to open output file [[FILE]]: {{[pP]}}ermission denied^M
-# ERROR2: unable to open output file : {{[nN]}}o such file or directory^M
+# ERROR1: unable to open output file [[FILE]]: [[MSG]]^M
+# ERROR2: unable to open output file : [[MSG]]^M