diff --git a/untests/CMakeLists.txt b/untests/CMakeLists.txt
index 3bb8c0c..2748725 100644
--- a/untests/CMakeLists.txt
+++ b/untests/CMakeLists.txt
@@ -23,13 +23,13 @@ target_link_libraries(${PROJECT_NAME} meta.hpp)
 target_compile_options(${PROJECT_NAME}
     PRIVATE
     $<$<CXX_COMPILER_ID:MSVC>:
-        /W4>
+        /WX /W4>
     PRIVATE
     $<$<CXX_COMPILER_ID:GNU>:
-        -Wall -Wextra -Wpedantic>
+        -Werror -Wall -Wextra -Wpedantic>
     PRIVATE
     $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:
-        -Weverything -Wno-unknown-warning-option
+        -Werror -Weverything -Wno-unknown-warning-option
         -Wconversion -Wimplicit-int-float-conversion
         -Wno-c++98-compat-pedantic -Wno-ctad-maybe-unsupported
         -Wno-float-equal -Wno-double-promotion -Wno-shadow-field-in-constructor>)