diff --git a/.github/workflows/tests-coverage.yml b/.github/workflows/tests-coverage.yml
index d20f6ecd6..951972d4d 100644
--- a/.github/workflows/tests-coverage.yml
+++ b/.github/workflows/tests-coverage.yml
@@ -38,6 +38,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Set up julia
+        if: runner.os == 'Linux'
         uses: julia-actions/setup-julia@v1
         with:
           version: "1.6"
diff --git a/tests/opf/test_powermodels_opf.py b/tests/opf/test_powermodels_opf.py
index 7546d92a4..4f6482f97 100644
--- a/tests/opf/test_powermodels_opf.py
+++ b/tests/opf/test_powermodels_opf.py
@@ -217,6 +217,7 @@ def setup_class(self):
                 df,
             )
 
+    @pytest.mark.runonlinux
     def test_pm_optimize(self):
         # OPF with all flexibilities but without overlying grid constraints
         pm_optimize(