See python/mypy#10768

Author: Iain-S

.github/workflows/linter.yml

@@ -30,6 +30,7 @@ jobs:
         uses: abatilo/actions-poetry@v3
 
       - name: Configure poetry
+        shell: bash
         run: poetry config virtualenvs.in-project true
 
       - name: Set up cache
@@ -44,8 +45,13 @@ jobs:
         run: poetry check --lock
 
       - name: Install dependencies
+        shell: bash
         run: poetry install --all-extras
 
+      - name: Clear MyPy Cache
+        shell: bash
+        run: rm -rf .mypy_cache
+
       - uses: pre-commit/[email protected]
         env:
           SAFETY_API_KEY: ${{ secrets.SAFETY_API_KEY }}