diff --git a/common_utility/configLoader.py b/common_utility/configLoader.py
index 300d9d3..daf692b 100644
--- a/common_utility/configLoader.py
+++ b/common_utility/configLoader.py
@@ -16,7 +16,7 @@ class IConfigLoader(object):
     def load(self, argument_parser: ArgumentParser) -> Namespace:
         raise NotImplementedError()
 
-    def dump(self, argument_parser: ArgumentParser, config: Namespace, file: TextIO = sys.stdout) -> None:
+    def dump(self, argument_parser: ArgumentParser, file: TextIO = sys.stdout) -> None:
         raise NotImplementedError()
 
 
@@ -60,7 +60,8 @@ def load(self, argument_parser: ArgumentParser) -> Namespace:
 
         return Namespace(**configuration)
 
-    def dump(self, argument_parser: ArgumentParser, config: Namespace, file: TextIO = sys.stdout) -> None:
+    def dump(self, argument_parser: ArgumentParser, file: TextIO = sys.stdout) -> None:
+        arguments = argument_parser.parse_known_args()[0]
         for group in argument_parser._action_groups:
             section = group.title if group.title else 'DEFAULT'
             values = {}
@@ -68,7 +69,7 @@ def dump(self, argument_parser: ArgumentParser, config: Namespace, file: TextIO
             for action in group._group_actions:
                 if not action.dest or action.dest == "help":
                     continue
-                value = getattr(config, action.dest, None)
+                value = getattr(arguments, action.dest, None)
                 if value is None:
                     continue
                 values[action.dest] = str(value)
diff --git a/tests/configLoaderTest.py b/tests/configLoaderTest.py
index 8ac7756..17b4972 100644
--- a/tests/configLoaderTest.py
+++ b/tests/configLoaderTest.py
@@ -1,11 +1,11 @@
 import sys
 import unittest
-from argparse import ArgumentParser, Namespace
+from argparse import ArgumentParser, _ArgumentGroup
 from configparser import ConfigParser
 from io import StringIO
 from pathlib import Path
 from unittest import TestCase
-from unittest.mock import patch
+from unittest.mock import patch, MagicMock
 
 from context_logger import setup_logging
 
@@ -222,11 +222,11 @@ def test_dump_when_values_present_then_write_config_sections(self):
         network_group.add_argument('--port')
         runtime_group = argument_parser.add_argument_group('runtime')
         runtime_group.add_argument('--debug')
-        config = Namespace(host='localhost', port=8080, debug=True)
         output = StringIO()
 
         # When
-        config_loader.dump(argument_parser, config, output)
+        with patch.object(sys, 'argv', ['test', '--host', 'localhost', '--port', '8080', '--debug', 'True']):
+            config_loader.dump(argument_parser, output)
 
         # Then
         parser = ConfigParser(interpolation=None)
@@ -242,11 +242,11 @@ def test_dump_when_value_is_none_then_skip_value(self):
         runtime_group = argument_parser.add_argument_group('runtime')
         runtime_group.add_argument('--timeout')
         runtime_group.add_argument('--retries')
-        config = Namespace(timeout=None, retries=3)
         output = StringIO()
 
         # When
-        config_loader.dump(argument_parser, config, output)
+        with patch.object(sys, 'argv', ['test', '--retries', '3']):
+            config_loader.dump(argument_parser, output)
 
         # Then
         parser = ConfigParser(interpolation=None)
@@ -261,11 +261,11 @@ def test_dump_when_all_values_in_group_are_none_then_omit_section(self):
         argument_parser = ArgumentParser()
         secret_group = argument_parser.add_argument_group('secret')
         secret_group.add_argument('--token')
-        config = Namespace(token=None)
         output = StringIO()
 
         # When
-        config_loader.dump(argument_parser, config, output)
+        with patch.object(sys, 'argv', ['test']):
+            config_loader.dump(argument_parser, output)
 
         # Then
         self.assertNotIn('[secret]', output.getvalue())
@@ -275,18 +275,16 @@ def test_dump_when_group_has_no_title_then_uses_default_section(self):
         config_loader = ConfigLoader(Path(DEFAULT_CONFIG_FILE))
         argument_parser = ArgumentParser(add_help=False)
         region_action = argument_parser.add_argument('--region')
+        dummy_group = MagicMock(spec=_ArgumentGroup)
+        dummy_group.title = None
+        dummy_group._group_actions = [region_action]
 
-        class DummyGroup(object):
-            def __init__(self):
-                self.title = None
-                self._group_actions = [region_action]
-
-        argument_parser._action_groups = [DummyGroup()]
-        config = Namespace(region='eu-central')
+        argument_parser._action_groups = [dummy_group]
         output = StringIO()
 
         # When
-        config_loader.dump(argument_parser, config, output)
+        with patch.object(sys, 'argv', ['test', '--region', 'eu-central']):
+            config_loader.dump(argument_parser, output)
 
         # Then
         parser = ConfigParser(interpolation=None)