Fix

src/python/grpcio_tests/tests/_result.py

@@ -326,7 +326,7 @@ class TerminalResult(CoverageResult):
         duration = end_time - self.start_time
         self.out.write(
             _Colors.FAIL
-            + " [{}]ERROR         {}[Duration: {}s]\n".format(
+            + " [{}]ERROR         {}[Duration: {}]\n".format(
                 datetime.datetime.now(), test.id(), duration
             )
             + _Colors.END
@@ -354,7 +354,7 @@ class TerminalResult(CoverageResult):
         duration = end_time - self.start_time
         self.out.write(
             _Colors.OK
-            + " [{}]SUCCESS       {}[Duration: {}s]\n".format(
+            + " [{}]SUCCESS       {}[Duration: {}]\n".format(
                 end_time, test.id(), duration
             )
             + _Colors.END

src/python/grpcio_tests/tests/unit/_metadata_flags_test.py

@@ -229,7 +229,6 @@ class MetadataFlagsTest(unittest.TestCase):
                 self.check_connection_does_failfast(
                     perform_call, channel, wait_for_ready=False
                 )
-        self.assertEqual(1, 2)
 
     def test_call_wait_for_ready_enabled(self):
         # To test the wait mechanism, Python thread is required to make