diff --git a/.github/workflows/tests-ubuntu.yml b/.github/workflows/tests-ubuntu.yml
index b2a5681df..ab6794d3c 100644
--- a/.github/workflows/tests-ubuntu.yml
+++ b/.github/workflows/tests-ubuntu.yml
@@ -73,7 +73,7 @@ jobs:
       if: contains(matrix.python-version, 'pypy') || contains(matrix.env.TOXENV, 'pinned')
       run: |
         sudo apt-get update
-        sudo apt-get install libxml2-dev libxslt-dev
+        sudo apt-get install libxml2-dev libxslt-dev libjpeg-dev
 
     - name: Run tests
       env: ${{ matrix.env }}