diff --git a/test/gtest/CMakeLists.txt b/test/gtest/CMakeLists.txt
index d82fb5c9..1282d62a 100644
--- a/test/gtest/CMakeLists.txt
+++ b/test/gtest/CMakeLists.txt
@@ -17,8 +17,6 @@ else ()
   target_compile_definitions(gtest PUBLIC GTEST_HAS_PTHREAD=0)
 endif ()
 
-target_compile_definitions(gtest PUBLIC GTEST_LANG_CXX11=1)
-
 if (MSVC)
   # Disable MSVC warnings of _CRT_INSECURE_DEPRECATE functions.
   target_compile_definitions(gtest PRIVATE _CRT_SECURE_NO_WARNINGS)