diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fdd1595..48a42c5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -92,7 +92,7 @@ jobs:
         path: coverage
 
     - name: Upload test coverage to Coveralls
-      if: startsWith(matrix.os == 'ubuntu')
+      if: startsWith(matrix.os, 'ubuntu')
       uses: coverallsapp/github-action@master
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}