diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b2c46fd..d8c6a48 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -144,7 +144,7 @@ jobs:
         run: mix compile --warnings-as-errors
 
       - name: Test
-        run: mix coveralls.github
+        run: mix coveralls.github --parallel --partitions 2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}