diff --git a/tests/unit/core/python/namespaces/test_PythonPackageNamespace.py b/tests/unit/core/python/namespaces/test_PythonPackageNamespace.py
index b564a9b..1087cf0 100644
--- a/tests/unit/core/python/namespaces/test_PythonPackageNamespace.py
+++ b/tests/unit/core/python/namespaces/test_PythonPackageNamespace.py
@@ -16,6 +16,7 @@ import pytest
 
 from src.jcloud_docsgen.core.python.namespaces import (
     PythonModuleNamespace,
+    PythonNamespace,
     PythonPackageNamespace,
 )
 from src.jcloud_docsgen.exceptions import (
@@ -256,6 +257,26 @@ def test_PythonPackageNamespace_sub_namespace_names(namespace, expected):
             PythonPackageNamespace('b', []),
             False,
         ),
+        (
+            PythonPackageNamespace('a', []),
+            'a',
+            False,
+        ),
+        (
+            PythonPackageNamespace('a', []),
+            'b',
+            False,
+        ),
+        (
+            PythonPackageNamespace('a', []),
+            PythonModuleNamespace('a'),
+            False,
+        ),
+        (
+            PythonPackageNamespace('a', []),
+            PythonNamespace('a'),
+            False,
+        ),
     ],
 )
 def test_PythonPackageNamespace___eq__(namespace1, namespace2, expected):