1 files changed, 3 insertions, 0 deletions
diff --git a/testing.h b/testing.h
index f27daf2..cb40294 100644
--- a/testing.h
+++ b/testing.h
@@ -1,4 +1,7 @@
+#include <stdio.h>
+
 #define t_assert(fact)                                                         \
   if (!(fact)) {                                                               \
+    fprintf(stderr, "Assertion failed: %s at %s:%d in %s()\n",  #fact, __FILE__, __LINE__, __func__); \
     return 1;                                                                  \
   }