Add match arg in pytest.warns for DeprecationWarning of NamespacePackageEncountered (#291)

Author: nathanjmcdougall

tests/unit/test_exceptions.py

@@ -60,5 +60,5 @@ def test_different_texts_are_not_equal(self):
 
 class TestNamespacePackageEncountered:
     def test_deprecated_access(self):
-        with pytest.warns(DeprecationWarning):
+        with pytest.warns(DeprecationWarning, match="NamespacePackageEncountered is deprecated"):
             exceptions.NamespacePackageEncountered