diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 5989c5f..f79753e 100755
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -60,6 +60,7 @@ jobs:
             apt-get update
             apt-get install -y --no-install-recommends python3 python3-pip
             pip3 install -U pip pytest
+            pip3 install -r requirements-tests.txt
           run: |
             set -e
             pip3 install cotengrust --find-links dist --force-reinstall