diff --git a/Tests/RunCMake/CheckCompilerFlag/CheckCompilerFlagSwift.cmake b/Tests/RunCMake/CheckCompilerFlag/CheckCompilerFlagSwift.cmake
index 23b300694b..676d64a10c 100644
--- a/Tests/RunCMake/CheckCompilerFlag/CheckCompilerFlagSwift.cmake
+++ b/Tests/RunCMake/CheckCompilerFlag/CheckCompilerFlagSwift.cmake
@@ -12,9 +12,9 @@ if(SHOULD_FAIL)
   message(SEND_ERROR "invalid Swift compile flag didn't fail.")
 endif()
 
-check_compiler_flag(Swift "-parseable-output" SHOULD_WORK)
+check_compiler_flag(Swift "-Onone" SHOULD_WORK)
 if(NOT SHOULD_WORK)
-  message(SEND_ERROR "Swift compiler flag '-parseable-output' check failed")
+  message(SEND_ERROR "Swift compiler flag '-Onone' check failed")
 endif()
 
 # Reset locale