diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 03daf7f..12e71e4 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -37,7 +37,9 @@ macro(configure_tests target)
     target_compile_definitions(${target} PRIVATE
         # Somewhat speed up Catch2 compile times
         CATCH_CONFIG_FAST_COMPILE
-        # Enable assertions for more thorough tests
+        # Fortify test suite for more thorough checks
+        _GLIBCXX_ASSERTIONS
+        _LIBCPP_ENABLE_ASSERTIONS=1
         GFX_TIMSORT_ENABLE_ASSERT
     )