diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index cbb4a473d..774b001ec 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -40,3 +40,10 @@ repos:
         pass_filenames: false
         types: [python]
         additional_dependencies: ["pyright@1.1.278"]
+  - repo: local
+    hooks:
+      - id: check-license-header
+        name: Check License Header
+        entry: ./utils/linting/check_file_header.py
+        language: python
+        types: [python]
diff --git a/examples/todomvc/mvctests/test_clear_completed_button.py b/examples/todomvc/mvctests/test_clear_completed_button.py
index 0d7757f06..a36b5b2b0 100644
--- a/examples/todomvc/mvctests/test_clear_completed_button.py
+++ b/examples/todomvc/mvctests/test_clear_completed_button.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Generator
 
 import pytest
diff --git a/examples/todomvc/mvctests/test_counter.py b/examples/todomvc/mvctests/test_counter.py
index 150ac085e..17bc98637 100644
--- a/examples/todomvc/mvctests/test_counter.py
+++ b/examples/todomvc/mvctests/test_counter.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Generator
 
 import pytest
diff --git a/examples/todomvc/mvctests/test_editing.py b/examples/todomvc/mvctests/test_editing.py
index 8fa0c6d7d..39d5caad6 100644
--- a/examples/todomvc/mvctests/test_editing.py
+++ b/examples/todomvc/mvctests/test_editing.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Generator
 
 import pytest
diff --git a/examples/todomvc/mvctests/test_item.py b/examples/todomvc/mvctests/test_item.py
index 52f5ea834..99cef20f5 100644
--- a/examples/todomvc/mvctests/test_item.py
+++ b/examples/todomvc/mvctests/test_item.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Generator
 
 import pytest
diff --git a/examples/todomvc/mvctests/test_mark_all_as_completed.py b/examples/todomvc/mvctests/test_mark_all_as_completed.py
index a3e55108b..bec157bd8 100644
--- a/examples/todomvc/mvctests/test_mark_all_as_completed.py
+++ b/examples/todomvc/mvctests/test_mark_all_as_completed.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Generator
 
 import pytest
diff --git a/examples/todomvc/mvctests/test_new_todo.py b/examples/todomvc/mvctests/test_new_todo.py
index 5619e9a6f..15a0dbbbf 100644
--- a/examples/todomvc/mvctests/test_new_todo.py
+++ b/examples/todomvc/mvctests/test_new_todo.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
 import re
 from typing import Generator
 
diff --git a/examples/todomvc/mvctests/test_persistence.py b/examples/todomvc/mvctests/test_persistence.py
index b417cdbaa..37457d51b 100644
--- a/examples/todomvc/mvctests/test_persistence.py
+++ b/examples/todomvc/mvctests/test_persistence.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Generator
 
 import pytest
diff --git a/examples/todomvc/mvctests/test_routing.py b/examples/todomvc/mvctests/test_routing.py
index 0b004575f..2d7efa3d2 100644
--- a/examples/todomvc/mvctests/test_routing.py
+++ b/examples/todomvc/mvctests/test_routing.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Generator
 
 import pytest
diff --git a/examples/todomvc/mvctests/utils.py b/examples/todomvc/mvctests/utils.py
index ba3d5decb..e0bf6ae1d 100644
--- a/examples/todomvc/mvctests/utils.py
+++ b/examples/todomvc/mvctests/utils.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 playwright.sync_api import Page
 
 TODO_ITEMS = ["buy some cheese", "feed the cat", "book a doctors appointment"]
diff --git a/playwright/_impl/_har_router.py b/playwright/_impl/_har_router.py
index 18e8b62e9..a96ba70bf 100644
--- a/playwright/_impl/_har_router.py
+++ b/playwright/_impl/_har_router.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
 import asyncio
 import base64
 from typing import TYPE_CHECKING, Optional, cast
diff --git a/playwright/_impl/_map.py b/playwright/_impl/_map.py
index d5c2dc5e4..95c05f445 100644
--- a/playwright/_impl/_map.py
+++ b/playwright/_impl/_map.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Dict, Generic, Tuple, TypeVar
 
 K = TypeVar("K")
diff --git a/playwright/_impl/_set_input_files_helpers.py b/playwright/_impl/_set_input_files_helpers.py
index 2ee52347b..8aabc4c61 100644
--- a/playwright/_impl/_set_input_files_helpers.py
+++ b/playwright/_impl/_set_input_files_helpers.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
 import base64
 import os
 import sys
diff --git a/scripts/update_versions.py b/scripts/update_versions.py
index a9f6bb503..50d8fff78 100644
--- a/scripts/update_versions.py
+++ b/scripts/update_versions.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
 import re
 from pathlib import Path
 
diff --git a/tests/async/conftest.py b/tests/async/conftest.py
index 1048be55c..ba141fcd5 100644
--- a/tests/async/conftest.py
+++ b/tests/async/conftest.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/async/test_accessibility.py b/tests/async/test_accessibility.py
index 8b2ff2e16..fa9a54b97 100644
--- a/tests/async/test_accessibility.py
+++ b/tests/async/test_accessibility.py
@@ -1,10 +1,10 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
+# 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,
diff --git a/tests/async/test_add_init_script.py b/tests/async/test_add_init_script.py
index 515891a88..07279f5a1 100644
--- a/tests/async/test_add_init_script.py
+++ b/tests/async/test_add_init_script.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/async/test_assertions.py b/tests/async/test_assertions.py
index 2e8e262a6..91d16b0c5 100644
--- a/tests/async/test_assertions.py
+++ b/tests/async/test_assertions.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/async/test_asyncio.py b/tests/async/test_asyncio.py
index 4d6174d1b..7ee019ead 100644
--- a/tests/async/test_asyncio.py
+++ b/tests/async/test_asyncio.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/async/test_browser.py b/tests/async/test_browser.py
index b9124c102..17bfb5b2f 100644
--- a/tests/async/test_browser.py
+++ b/tests/async/test_browser.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/async/test_browsercontext_service_worker_policy.py b/tests/async/test_browsercontext_service_worker_policy.py
index 71a9636c7..7adcd2d54 100644
--- a/tests/async/test_browsercontext_service_worker_policy.py
+++ b/tests/async/test_browsercontext_service_worker_policy.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 playwright.async_api import Browser
 from tests.server import Server
 
diff --git a/tests/async/test_chromium_tracing.py b/tests/async/test_chromium_tracing.py
index deb2b10ae..f1c34b5ba 100644
--- a/tests/async/test_chromium_tracing.py
+++ b/tests/async/test_chromium_tracing.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/async/test_device_descriptors.py b/tests/async/test_device_descriptors.py
index e8ca64625..ee2e72cdd 100644
--- a/tests/async/test_device_descriptors.py
+++ b/tests/async/test_device_descriptors.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
 import pytest
 
 
diff --git a/tests/async/test_headful.py b/tests/async/test_headful.py
index 8939bf0c2..bc1df9b69 100644
--- a/tests/async/test_headful.py
+++ b/tests/async/test_headful.py
@@ -1,10 +1,10 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
+# 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,
diff --git a/tests/async/test_queryselector.py b/tests/async/test_queryselector.py
index 65e2700dd..814f7a3a9 100644
--- a/tests/async/test_queryselector.py
+++ b/tests/async/test_queryselector.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
 import pytest
 
 from playwright.async_api import Error, Page
diff --git a/tests/async/test_selectors_text.py b/tests/async/test_selectors_text.py
index 9de7f6b4d..0b231ccab 100644
--- a/tests/async/test_selectors_text.py
+++ b/tests/async/test_selectors_text.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
 import re
 
 import pytest
diff --git a/tests/async/test_tracing.py b/tests/async/test_tracing.py
index 13f510591..1473ab648 100644
--- a/tests/async/test_tracing.py
+++ b/tests/async/test_tracing.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/async/test_worker.py b/tests/async/test_worker.py
index 399df4407..08d6bd0cc 100644
--- a/tests/async/test_worker.py
+++ b/tests/async/test_worker.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/common/test_collect_handles.py b/tests/common/test_collect_handles.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/common/test_events.py b/tests/common/test_events.py
index ac2ffe931..07d6c4e2b 100644
--- a/tests/common/test_events.py
+++ b/tests/common/test_events.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 typing import Dict
 
 import pytest
diff --git a/tests/common/test_signals.py b/tests/common/test_signals.py
index 7d78865ce..472e74042 100644
--- a/tests/common/test_signals.py
+++ b/tests/common/test_signals.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
 import asyncio
 import multiprocessing
 import os
diff --git a/tests/common/test_threads.py b/tests/common/test_threads.py
index 6d4b1963e..b957244f2 100644
--- a/tests/common/test_threads.py
+++ b/tests/common/test_threads.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/conftest.py b/tests/conftest.py
index 3c44f908c..a3b8e9992 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/sync/conftest.py b/tests/sync/conftest.py
index d7942bf90..075cccde2 100644
--- a/tests/sync/conftest.py
+++ b/tests/sync/conftest.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/sync/test_accessibility.py b/tests/sync/test_accessibility.py
index d71f27a4d..d7516d6d9 100644
--- a/tests/sync/test_accessibility.py
+++ b/tests/sync/test_accessibility.py
@@ -1,10 +1,10 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
+# 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,
diff --git a/tests/sync/test_add_init_script.py b/tests/sync/test_add_init_script.py
index 039862063..e17fc5e8b 100644
--- a/tests/sync/test_add_init_script.py
+++ b/tests/sync/test_add_init_script.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/sync/test_assertions.py b/tests/sync/test_assertions.py
index 724f1d980..7d53d18a6 100644
--- a/tests/sync/test_assertions.py
+++ b/tests/sync/test_assertions.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/sync/test_browser.py b/tests/sync/test_browser.py
index 31d43e68f..ded881c67 100644
--- a/tests/sync/test_browser.py
+++ b/tests/sync/test_browser.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/sync/test_browsercontext_service_worker_policy.py b/tests/sync/test_browsercontext_service_worker_policy.py
index 7f4350d7f..190bdfbd5 100644
--- a/tests/sync/test_browsercontext_service_worker_policy.py
+++ b/tests/sync/test_browsercontext_service_worker_policy.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 playwright.sync_api import Browser
 from tests.server import Server
 
diff --git a/tests/sync/test_locator_get_by.py b/tests/sync/test_locator_get_by.py
index 42939672f..0e5d4396b 100644
--- a/tests/sync/test_locator_get_by.py
+++ b/tests/sync/test_locator_get_by.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/sync/test_queryselector.py b/tests/sync/test_queryselector.py
index 367b90e9a..f773b5109 100644
--- a/tests/sync/test_queryselector.py
+++ b/tests/sync/test_queryselector.py
@@ -1,3 +1,16 @@
+# Copyright (c) Microsoft Corporation.
+#
+# 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 pathlib import Path
 
 import pytest
diff --git a/tests/sync/test_sync.py b/tests/sync/test_sync.py
index 11f6aab08..e22490426 100644
--- a/tests/sync/test_sync.py
+++ b/tests/sync/test_sync.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/sync/test_tracing.py b/tests/sync/test_tracing.py
index 5c5084240..61e67009d 100644
--- a/tests/sync/test_tracing.py
+++ b/tests/sync/test_tracing.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/test_generation_scripts.py b/tests/test_generation_scripts.py
index 91127dc02..9a4f78293 100644
--- a/tests/test_generation_scripts.py
+++ b/tests/test_generation_scripts.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/test_installation.py b/tests/test_installation.py
index ccde56361..e0f9433ab 100644
--- a/tests/test_installation.py
+++ b/tests/test_installation.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/tests/test_reference_count_async.py b/tests/test_reference_count_async.py
index 345be83a5..cc1564aa6 100644
--- a/tests/test_reference_count_async.py
+++ b/tests/test_reference_count_async.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 #
-# Licensed under the Apache License, Version 2.0 (the "License")
+# 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
 #
diff --git a/utils/linting/check_file_header.py b/utils/linting/check_file_header.py
new file mode 100755
index 000000000..5ccf79d5f
--- /dev/null
+++ b/utils/linting/check_file_header.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
+
+import sys
+from pathlib import Path
+from typing import List
+
+LICENSE_HEADER = """
+# Copyright (c) Microsoft Corporation.
+#
+# 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.
+""".strip()
+
+
+def file_has_license(file_path: str) -> None:
+    path = Path(file_path)
+    if not path.name.endswith(".py"):
+        return
+    if not path.exists():
+        raise Exception(f"File {file_path} does not exist")
+    content = path.read_text(encoding="utf-8")
+    if content.strip() == "":
+        return
+    if content.startswith("#!"):
+        # flake8: noqa: E203
+        content = content[content.find("\n") + 1 :]
+    if not content.startswith(LICENSE_HEADER):
+        raise Exception(f"File {file_path} does not have license header")
+
+
+def main() -> None:
+    errors: List[str] = []
+
+    for file_path in sys.argv[1:]:
+        try:
+            file_has_license(file_path)
+        except Exception as e:
+            errors.append(str(e))
+
+    if errors:
+        print("Missing license header in files:")
+        for error in errors:
+            print("  -", error)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()