diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c682d68..7c48c63 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,6 +47,7 @@ jobs:
         apt-get update && apt-get install -y build-essential
         python -m pip install --upgrade pip
         pip install --no-build-isolation .
+        pip install coverage
     - name: Run tests
       run: make unittest
     - name: coverage