diff --git a/tests/unit/core/python/_core/test_PythonDocumentationGenerator.py b/tests/unit/core/python/_core/test_PythonDocumentationGenerator.py
index 9726a53..5091baf 100644
--- a/tests/unit/core/python/_core/test_PythonDocumentationGenerator.py
+++ b/tests/unit/core/python/_core/test_PythonDocumentationGenerator.py
@@ -1,5 +1,16 @@
-import sys
-sys.path.append('.')
+# Copyright 2026 jCloud Services GbR
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from src.jcloud_docsgen.core.python import PythonDocumentationGenerator
 from src.jcloud_docsgen.core.python.namespaces import PythonModuleNamespace, PythonPackageNamespace
diff --git a/tests/unit/core/python/namespaces/test_PythonModuleNamespace.py b/tests/unit/core/python/namespaces/test_PythonModuleNamespace.py
index ce42baa..b4733a6 100644
--- a/tests/unit/core/python/namespaces/test_PythonModuleNamespace.py
+++ b/tests/unit/core/python/namespaces/test_PythonModuleNamespace.py
@@ -1,3 +1,17 @@
+# Copyright 2026 jCloud Services GbR
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from src.jcloud_docsgen.core.python.namespaces import PythonModuleNamespace
 import pytest
 
diff --git a/tests/unit/core/python/namespaces/test_PythonNamespace.py b/tests/unit/core/python/namespaces/test_PythonNamespace.py
index 6fc0373..06c29c7 100644
--- a/tests/unit/core/python/namespaces/test_PythonNamespace.py
+++ b/tests/unit/core/python/namespaces/test_PythonNamespace.py
@@ -1,3 +1,17 @@
+# Copyright 2026 jCloud Services GbR
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from src.jcloud_docsgen.core.python.namespaces import PythonNamespace
 import pytest
 
diff --git a/tests/unit/core/python/namespaces/test_PythonPackageNamespace.py b/tests/unit/core/python/namespaces/test_PythonPackageNamespace.py
index 71d1ad2..d4b22f3 100644
--- a/tests/unit/core/python/namespaces/test_PythonPackageNamespace.py
+++ b/tests/unit/core/python/namespaces/test_PythonPackageNamespace.py
@@ -1,3 +1,17 @@
+# Copyright 2026 jCloud Services GbR
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from src.jcloud_docsgen.core.python.namespaces import PythonPackageNamespace, PythonModuleNamespace
 import pytest
 from src.jcloud_docsgen.exceptions import NamespaceNotFoundError, InvalidNamespaceError
diff --git a/tests/unit/utils/test_ExistingDirectory.py b/tests/unit/utils/test_ExistingDirectory.py
index d462f3d..3687bf9 100644
--- a/tests/unit/utils/test_ExistingDirectory.py
+++ b/tests/unit/utils/test_ExistingDirectory.py
@@ -1,3 +1,17 @@
+# Copyright 2026 jCloud Services GbR
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from src.jcloud_docsgen.utils import ExistingDirectory
 import pytest
 import pathlib
diff --git a/tests/unit/utils/test_ExistingFile.py b/tests/unit/utils/test_ExistingFile.py
index 4c6b947..9a11388 100644
--- a/tests/unit/utils/test_ExistingFile.py
+++ b/tests/unit/utils/test_ExistingFile.py
@@ -1,3 +1,17 @@
+# Copyright 2026 jCloud Services GbR
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from src.jcloud_docsgen.utils import ExistingFile
 import pytest
 import pathlib
diff --git a/tests/unit/utils/test_assert_that_is_instance.py b/tests/unit/utils/test_assert_that_is_instance.py
index 580e121..eacb426 100644
--- a/tests/unit/utils/test_assert_that_is_instance.py
+++ b/tests/unit/utils/test_assert_that_is_instance.py
@@ -1,3 +1,17 @@
+# Copyright 2026 jCloud Services GbR
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from src.jcloud_docsgen.utils import assert_that_is_instance
 import pytest
 import types
diff --git a/tests/unit/utils/test_human_readable_list.py b/tests/unit/utils/test_human_readable_list.py
index 6665f3f..0a2207e 100644
--- a/tests/unit/utils/test_human_readable_list.py
+++ b/tests/unit/utils/test_human_readable_list.py
@@ -1,3 +1,17 @@
+# Copyright 2026 jCloud Services GbR
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from src.jcloud_docsgen.utils import human_readable_list
 import pytest