diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8d765505b..ca376676e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -75,14 +75,18 @@ jobs:
               with:
                 python-version: 3.8
 
-            - name: Check python code
-              run: |
-                  pip install flake8 sphinx
-                  python -m flake8 --count .
+            - name: Install build-only deps
+              run: pip install flake8 mypy sphinx
+
+            - name: Run pyflakes
+              run: python -m flake8 --count .
 
             - name: Build kitty package
               run: python .github/workflows/ci.py package
 
+            - name: Run mypy
+              run: python test.py mypy
+
             - name: Build man page
               run: make FAIL_WARN=-W man
 
diff --git a/test.py b/test.py
index 2b0364ae3..1e9d96a5a 100755
--- a/test.py
+++ b/test.py
@@ -72,7 +72,7 @@ def type_check() -> NoReturn:
     generate_stub()
     from kitty.options_stub import generate_stub  # type: ignore
     generate_stub()
-    os.execlp('mypy', 'mypy', '--pretty')
+    os.execlp(sys.executable, 'python', '-m', 'mypy', '--pretty')
 
 
 def run_tests():