diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index c1cd8bb..031bdac 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -59,7 +59,7 @@ CHECK_CXX_COMPILER_FLAG("-Wuseless-cast"        COMPILER_SUPPORTS_WUSELESS_CAST)
 CHECK_CXX_COMPILER_FLAG("-Wdouble-promotion"    COMPILER_SUPPORTS_WDOUBLE_PROMOTION)
 CHECK_CXX_COMPILER_FLAG("-Wrange-loop-analysis" COMPILER_SUPPORTS_WRANGE_LOOP_ANALYSIS)
 CHECK_CXX_COMPILER_FLAG("-Wundef"               COMPILER_SUPPORTS_WUNDEF)
-CHECK_CXX_COMPILER_FLAG("-Wshadow=local"        COMPILER_SUPPORTS_WSHADOW_LOCAL)
+CHECK_CXX_COMPILER_FLAG("-Wshadow"              COMPILER_SUPPORTS_WSHADOW)
 
 if(COMPILER_SUPPORTS_WALL)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
@@ -73,8 +73,8 @@ endif()
 if(COMPILER_SUPPORTS_WERROR)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
 endif()
-if(COMPILER_SUPPORTS_WSHADOW_LOCAL)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wshadow=local")
+if(COMPILER_SUPPORTS_WSHADOW)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wshadow")
 endif()
 if(COMPILER_SUPPORTS_WSIGN_CONVERSION)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wsign-conversion")