--- check-0.15.1/src/check.h.in.orig	2020-07-22 08:19:48.000000000 -0600
+++ check-0.15.1/src/check.h.in	2020-08-03 11:41:08.131406149 -0600
@@ -466,7 +466,10 @@ static void __testname ## _fn (int _i CK
  *
  * This call is deprecated.
  */
-#define fail_unless ck_assert_msg
+#define fail_unless(expr, ...) \
+  (expr) ? \
+    _mark_point(__FILE__, __LINE__) : \
+    _ck_assert_failed(__FILE__, __LINE__, "Assertion '"#expr"' failed" , ## __VA_ARGS__, NULL)
 
 /*
  * Fail the test case if expr is false
@@ -480,7 +483,7 @@ static void __testname ## _fn (int _i CK
  */
 #define fail_if(expr, ...)\
   (expr) ? \
-     _ck_assert_failed(__FILE__, __LINE__, "Failure '"#expr"' occurred" , ## __VA_ARGS__) \
+     _ck_assert_failed(__FILE__, __LINE__, "Failure '"#expr"' occurred" , ## __VA_ARGS__, NULL) \
      : _mark_point(__FILE__, __LINE__)
 
 /*
@@ -488,7 +491,7 @@ static void __testname ## _fn (int _i CK
  *
  * This call is deprecated.
  */
-#define fail ck_abort_msg
+#define fail(...) _ck_assert_failed(__FILE__, __LINE__, "Failed" , ## __VA_ARGS__, NULL)
 
 /*
  * This is called whenever an assertion fails.