diff --git a/moo/t/t.h b/moo/t/t.h
index e5e7f49..0426a4f 100644
--- a/moo/t/t.h
+++ b/moo/t/t.h
@@ -4,8 +4,8 @@
 #include <stdio.h>
 
 #if defined(__STDC_VERSION__) && (__STDC_VERSION__>=199901L)
-#	define T_ASSERT_FAIL1(msg1) printf("FAILURE in %s[%d] - %s\n", __func__, (int)__LINE__, msg1)
-#	define T_ASSERT_FAIL2(msg1,msg2) printf("FAILURE in %s[%d] - %s - %s\n", __func__, (int)__LINE__, msg1, msg2)
+#	define T_ASSERT_FAIL1(msg1) printf("FAILURE in %s:%s[%d] - %s\n", __FILE__, __func__, (int)__LINE__, msg1)
+#	define T_ASSERT_FAIL2(msg1,msg2) printf("FAILURE in %s:%s[%d] - %s - %s\n", __FILE__, __func__, (int)__LINE__, msg1, msg2)
 #else
 #	define T_ASSERT_FAIL1(msg1) printf("FAILURE in %s[%d] - %s\n", __FILE__, (int)__LINE__, msg1)
 #	define T_ASSERT_FAIL2(msg1,msg2) printf("FAILURE in %s[%d] - %s - %s\n", __FILE__, (int)__LINE__, msg1, msg2)