[core/client] enable more tests (#13961)

python/ray/tests/test_monitor.py

@@ -37,3 +37,9 @@ def test_parse_resource_demands():
     # counted as infeasible or waiting, as long as it's accounted for and
     # doesn't cause an error.
     assert len(waiting + infeasible) == 10
+
+
+if __name__ == "__main__":
+    import sys
+    import pytest
+    sys.exit(pytest.main(["-v", __file__]))