diff --git a/.github/mypy/mypy.ini b/.github/mypy/mypy.ini
index c80af3de..1822c0ae 100644
--- a/.github/mypy/mypy.ini
+++ b/.github/mypy/mypy.ini
@@ -1,4 +1,7 @@
 [mypy]
+exclude = (?x)(
+    _pb2\.py$    # protobuf generated files
+  )
 
 [mypy-halo.*]
 ignore_missing_imports = True
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e60eb4e5..ea5eb30c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -34,9 +34,9 @@ jobs:
     - name: Install dependencies
       run: pip install -e .[dev]
     - name: Lint with isort
-      run: isort --profile black --length-sort --line-width 120 -c .
+      run: isort --profile black --length-sort --line-width 120 --skip-glob "*_pb2.py" -c .
     - name: Lint with black
-      run: black -l 120 --check .
+      run: black -l 120 --extend-exclude ".*_pb2.py" --check .
     - name: Lint with pycodestyle
       run: pycodestyle --show-source capa/ scripts/ tests/
     - name: Check types with mypy