diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8548108e..955183f8 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -56,12 +56,12 @@ jobs:
             os: ubuntu-latest
             python-version: 3.x
             mpi: openmpi
-            cobaya_skip: classy,polychord
+            cobaya_skip: polychord
           - name: "OS X Python 3.8 (with classy)"
             os: macos-latest
             python-version: 3.8
             mpi: openmpi
-            cobaya_skip: polychord
+            cobaya_skip: classy, polychord
           - name: "Windows Python 3.12"
             os: windows-latest
             python-version: 3.12
@@ -176,4 +176,4 @@ jobs:
         run: python -m build --sdist
 
       - name: Publish package
-        uses: pypa/gh-action-pypi-publish@release/v1
\ No newline at end of file
+        uses: pypa/gh-action-pypi-publish@release/v1