diff --git a/tests/run_tester b/tests/run_tester
index 196c556..e6b878a 100755
--- a/tests/run_tester
+++ b/tests/run_tester
@@ -1,5 +1,10 @@
-#!/opt/homebrew/opt/python@3.11/bin/python3.11
-# -*- coding: utf-8 -*-
+#!/usr/bin/env python3
+# -*- Mode: python; tab-width: 4; indent-tabs-mode:nil; coding:utf-8 -*-
+#
+# Copyright (c) 2024 Authors and contributors
+#
+# Released under the GNU Public Licence, v2 or any higher version
+# SPDX-License-Identifier: GPL-2.0-or-later
 import re
 import sys
 
diff --git a/tests/tester/__init__.py b/tests/tester/__init__.py
index 8b20676..4fd4697 100644
--- a/tests/tester/__init__.py
+++ b/tests/tester/__init__.py
@@ -1 +1,10 @@
+#!/usr/bin/env python3
+# -*- Mode: python; tab-width: 4; indent-tabs-mode:nil; coding:utf-8 -*-
+#
+# Copyright (c) 2024 Authors and contributors
+#
+# Released under the GNU Public Licence, v2 or any higher version
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""Make the tester module available to mdacli."""
+
 from .tester_class import Tester  # noqa
diff --git a/tests/tester/tester_class.py b/tests/tester/tester_class.py
index 18b59de..eaa6f35 100644
--- a/tests/tester/tester_class.py
+++ b/tests/tester/tester_class.py
@@ -5,7 +5,7 @@
 #
 # Released under the GNU Public Licence, v2 or any higher version
 # SPDX-License-Identifier: GPL-2.0-or-later
-"""Test module for mdacli."""
+"""Mock module for mdacli to test logging."""
 
 import logging
 
@@ -16,7 +16,10 @@
 
 
 class Tester(AnalysisBase):
-    """Test class for mdacli. I AM STUPID.
+    """Mock class for mdacli. Implements only the minimum requirements.
+
+    Currently only logs messages at different levels to check the verbosity and
+    debug flags in the CLI.
 
     Parameters
     ----------