diff --git a/test.py b/test.py
index c777835650..eda7cbf3bd 100755
--- a/test.py
+++ b/test.py
@@ -675,7 +675,8 @@ class CQLApprovalTest(Test):
 
         def set_summary(summary):
             self.summary = summary
-            logging.info("Test %s %s", self.uname, summary)
+            log_func = logging.info if self.success else logging.error
+            log_func("Test %s %s", self.uname, summary)
             if self.server_log is not None:
                 logging.info("Server log:\n%s", self.server_log)
 
@@ -703,7 +704,7 @@ Check test log at {}.""".format(self.log_filename))
                 else:
                     self.is_equal_result = filecmp.cmp(self.result, self.tmpfile)
                     if self.is_equal_result is False:
-                        self.unidiff = format_unidiff(self.result, self.tmpfile)
+                        self.unidiff = format_unidiff(str(self.result), self.tmpfile)
                         set_summary("failed: test output does not match expected result")
                         assert self.unidiff is not None
                         logging.info("\n{}".format(palette.nocolor(self.unidiff)))