diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a047fa0d..23d1cd63 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -50,6 +50,7 @@ jobs:
           sudo apt-get -qq update
           sudo apt-get install -y python2.7 python3.6 python3.7
           sudo pip install autopep8
+          sudo pip install pyparsing==2.4.7
       - name: Run Python tests
         run: |
           bin/before-install