diff --git a/test/main.h b/test/main.h
index 8c84e525c..619fc9e06 100644
--- a/test/main.h
+++ b/test/main.h
@@ -30,6 +30,10 @@
 #include <vector>
 #include <typeinfo>
 
+#ifdef NDEBUG
+#undef NDEBUG
+#endif
+
 #ifndef EIGEN_TEST_FUNC
 #error EIGEN_TEST_FUNC must be defined
 #endif