diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index d590dc8..a7efa4c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -32,7 +32,7 @@ jobs:
         uses: actions-rs/tarpaulin@v0.1
         with:
           version: '0.15.0'
-          args: '-- -test-threads 1'
+          args: '-- --test-threads 1'
 
 #  build-publish:
 #    runs-on: ubuntu-latest