diff --git a/tests/tests.cpp b/tests/tests.cpp
index 4badbc73..a8a513c4 100644
--- a/tests/tests.cpp
+++ b/tests/tests.cpp
@@ -324,7 +324,7 @@ test_rmdir()
   struct stat st;
   rv = fstatat(dir_fd,"",&st,AT_EMPTY_PATH);
   TEST_CHECK(rv == 0);
-  TEST_MSG("expected: 0; got: %d:%d",rv,errno);
+  TEST_MSG("expected: 0; got: %d:%d:%s",rv,errno,strerror(errno));
 
   close(dir_fd);
   close(root_fd);