diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 255b0ac..3c45b11 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -49,6 +49,7 @@ jobs:
           pip install pytest-xvfb
           pip install coverage
           pip install -e ".[testing]"
+          pip install matplotlib
         working-directory: src/client
 
       - name: Install server dependencies (for communication tests)