diff --git a/llvm/test/tools/llvm-dwp/X86/diagnose_missing_dwos.test b/llvm/test/tools/llvm-dwp/X86/diagnose_missing_dwos.test
--- a/llvm/test/tools/llvm-dwp/X86/diagnose_missing_dwos.test
+++ b/llvm/test/tools/llvm-dwp/X86/diagnose_missing_dwos.test
@@ -3,8 +3,8 @@
 RUN: cd %t
 RUN: cp %p/../Inputs/dwos_list_from_exec/b.dwo b.dwo
 RUN: cp %p/../Inputs/dwos_list_from_exec/main main
-RUN: not llvm-dwp -e binary -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-BIN
-RUN: not llvm-dwp -e main -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-1ST-DWO
+RUN: not llvm-dwp -e binary -o /dev/null 2>&1 | FileCheck -DMSG=%errc_ENOENT %s --check-prefix=CHECK-BIN
+RUN: not llvm-dwp -e main -o /dev/null 2>&1 | FileCheck -DMSG=%errc_ENOENT %s --check-prefix=CHECK-1ST-DWO
 RUN: cp %p/../Inputs/dwos_list_from_exec/a.dwo a.dwo
 RUN: rm b.dwo
 RUN: not llvm-dwp -e main -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-2ND-DWO
@@ -23,6 +23,6 @@
      return 0;
   }
 
-CHECK-BIN: error: 'binary': {{[Nn]}}o such file or directory
-CHECK-1ST-DWO: error: './a.dwo': {{[Nn]}}o such file or directory
-CHECK-2ND-DWO: error: './b.dwo': {{[Nn]}}o such file or directory
+CHECK-BIN: error: 'binary': [[MSG]]
+CHECK-1ST-DWO: error: './a.dwo': [[MSG]]
+CHECK-2ND-DWO: error: './b.dwo': [[MSG]]
diff --git a/llvm/test/tools/llvm-tapi-diff/misspelled-tbd.test b/llvm/test/tools/llvm-tapi-diff/misspelled-tbd.test
--- a/llvm/test/tools/llvm-tapi-diff/misspelled-tbd.test
+++ b/llvm/test/tools/llvm-tapi-diff/misspelled-tbd.test
@@ -1,3 +1,3 @@
-; RUN: not llvm-tapi-diff %S/Inputs/v4A.tbd %S/Inputs/v4.tbd 2>&1 | FileCheck %s
+; RUN: not llvm-tapi-diff %S/Inputs/v4A.tbd %S/Inputs/v4.tbd 2>&1 | FileCheck -DMSG=%errc_ENOENT %s
 
-; CHECK: error: {{.*}}v4.tbd' {{[Nn]}}o such file or directory
+; CHECK: error: {{.*}}v4.tbd' [[MSG]]