diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 6d7ba4e..6aaa779 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -39,6 +39,7 @@ set(TEST_NAMES
 CHECK_CXX_COMPILER_FLAG("-Wall"      COMPILER_SUPPORTS_WALL)
 CHECK_CXX_COMPILER_FLAG("-Wextra"    COMPILER_SUPPORTS_WEXTRA)
 CHECK_CXX_COMPILER_FLAG("-Wpedantic" COMPILER_SUPPORTS_WPEDANTIC)
+CHECK_CXX_COMPILER_FLAG("-Werror"    COMPILER_SUPPORTS_WERROR)
 
 CHECK_CXX_COMPILER_FLAG("-Wsign-conversion"     COMPILER_SUPPORTS_WSIGN_CONVERSION)
 CHECK_CXX_COMPILER_FLAG("-Wconversion"          COMPILER_SUPPORTS_WCONVERSION)
@@ -57,6 +58,9 @@ endif()
 if(COMPILER_SUPPORTS_WPEDANTIC)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wpedantic")
 endif()
+if(COMPILER_SUPPORTS_WERROR)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
+endif()
 if(COMPILER_SUPPORTS_WSIGN_CONVERSION)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wsign-conversion")
 endif()