diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4e191dd5f..5bc797745 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -57,6 +57,8 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.py }}
+      - name: Install sox
+        run: sudo apt-get install sox
       - name: Install tox
         run: python -m pip install tox-gh>=1.2
       - name: Setup test suite