diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 66e156d..6dba511 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -28,6 +28,7 @@ jobs:
         
       - name: Install everything, run the tests, produce the .coverage file
         run: | # This is the part where you put your own test command
+            apt-get install python-tk
             python -m coverage run -m unittest
             python -m coverage report