--- a/tests/test.py	Thu Dec 07 08:42:33 2023 +0100
+++ b/tests/test.py	Thu Dec 07 08:43:04 2023 +0100
@@ -2635,6 +2635,32 @@
         self.assertEqual(u("abcQQQ123456"),
                          self._cfg.getvarl(u("globals"), u("user2"), u("pwd")))
 
+    def test_copy_new_config_complex_path(self):
+        with self.assertRaises(ValueError):
+            nc = self._cfg.copy_new_config_without("globals", "user1")
+
+    def test_copy_new_config_empty(self):
+        nc = self._cfg.copy_new_config_without()
+        nc.getvarl("globals")
+        nc.getvarl("pool")
+        nc.getvarl("section")
+        nc.getvarl("parts")
+
+    def test_copy_new_config_unexisting_path(self):
+        nc = self._cfg.copy_new_config_without("unexisting")
+        nc.getvarl("globals")
+        nc.getvarl("pool")
+        nc.getvarl("section")
+        nc.getvarl("parts")
+
+    def test_copy_new_config_existing(self):
+        nc = self._cfg.copy_new_config_without("globals")
+        with self.assertRaises(KeyError):
+            nc.getvarl("globals")
+        nc.getvarl("pool")
+        nc.getvarl("section")
+        nc.getvarl("parts")
+
 
 if __name__ == "__main__":
     unittest.main()