diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 47d1d2dc..3124f030 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -79,7 +79,7 @@ jobs:
           echo "total=$TOTAL" >> $GITHUB_ENV
 
           # Report again and fail if under the threshold.
-          python -Im coverage report --fail-under=99
+          python -Im coverage report --fail-under=100
 
       - name: "Upload HTML report."
         uses: "actions/upload-artifact@v4"