diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e9d48ef..1e16c45 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -117,7 +117,7 @@ jobs:
           path: ${{ env.PACKAGES_PATH }}
 
       - name: pytest[${{ matrix.python }}]
-        run: dwas --verbose --only pytest[${{ matrix.python }}] -- ${{ startsWith(matrix.python, 'pypy') || '--numprocesses 2' }}
+        run: dwas --verbose --only pytest[${{ matrix.python }}] -- ${{ startsWith(matrix.python, 'pypy') && '' || '--numprocesses 2' }}
 
       - name: Move the coverage to another place to avoid conflicts
         if: runner.os != 'Linux'