diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 91084a0..2ec4608 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -45,5 +45,5 @@ jobs:
     - name: Run code coverage
       if: ${{ (matrix.python-version == '3.12') && (matrix.os == 'ubuntu-latest') }}
       run: |
-        coverage run -m pytest tests
+        coverage run --debug=trace -m pytest tests -s
         coverage report --fail-under=100
diff --git a/pyproject.toml b/pyproject.toml
index 23e53bd..3b25062 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ ignore-vcs = true
 packages = ["src/ypywidgets"]
 
 [tool.coverage.run]
-source = ["src/ypywidgets", "tests"]
+source = ["src", "tests"]
 
 [tool.coverage.report]
 show_missing = true