Unset -Werror from the builds
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -156,9 +156,6 @@ 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_WSHADOW)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wshadow")
 endif()