diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 63e1928..6adbe79 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -29,6 +29,7 @@ jobs:
         path: |
           ~/.cache/pip
           eggs
+          .tox
         key: ${{ runner.os }}-pip-${{ matrix.config[0] }}-${{ hashFiles('setup.*', 'tox.ini') }}
         restore-keys: |
           ${{ runner.os }}-pip-${{ matrix.config[0] }}-