diff --git a/CMakeLists.txt b/CMakeLists.txt
index fca6ece..5304a2a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,14 +2,12 @@ cmake_minimum_required(VERSION 3.9)
 
 project(fast_float VERSION 1.0.0 LANGUAGES CXX)
 option(FASTFLOAT_TEST "Enable tests" OFF)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 if(FASTFLOAT_TEST)
-  set(CMAKE_CXX_STANDARD 17)
-  set(CMAKE_CXX_STANDARD_REQUIRED OFF)
   enable_testing()
   add_subdirectory(tests)
 else(FASTFLOAT_TEST)
-  set(CMAKE_CXX_STANDARD 11)
-  set(CMAKE_CXX_STANDARD_REQUIRED ON)
   message(STATUS "Tests are disabled. Set FASTFLOAT_TEST to ON to run tests.")
 endif(FASTFLOAT_TEST)