-CHECK_LOCKFILE([lock_blocks_same_process], [0])
-CHECK_LOCKFILE([lock_blocks_same_process_twice], [0])
-CHECK_LOCKFILE([lock_blocks_other_process], [1])
-CHECK_LOCKFILE([lock_twice_blocks_other_process], [1])
+
+CHECK_LOCKFILE([lock_blocks_same_process], [0],
+ [lockfile|WARN|.file.~lock~: cannot lock file because this process has already locked it
+])
+
+CHECK_LOCKFILE([lock_blocks_same_process_twice], [0],
+ [lockfile|WARN|.file.~lock~: cannot lock file because this process has already locked it
+lockfile|WARN|.file.~lock~: cannot lock file because this process has already locked it
+])
+
+CHECK_LOCKFILE([lock_blocks_other_process], [1],
+ [lockfile|WARN|.file.~lock~: child does not inherit lock
+lockfile|WARN|.file.~lock~: cannot lock file because it is already locked by pid <pid>
+])
+
+CHECK_LOCKFILE([lock_twice_blocks_other_process], [1],
+ [lockfile|WARN|.file.~lock~: cannot lock file because this process has already locked it
+lockfile|WARN|.file.~lock~: child does not inherit lock
+lockfile|WARN|.file.~lock~: cannot lock file because it is already locked by pid <pid>
+])
+