diff --git a/.github/workflows/build-mac.yml b/.github/workflows/build-mac.yml
index 275a3c62a2..2d73abef47 100644
--- a/.github/workflows/build-mac.yml
+++ b/.github/workflows/build-mac.yml
@@ -43,17 +43,15 @@ jobs:
             --venv-name firedrake_venv \
             --disable-ssh \
             || (cat firedrake-install.log && /bin/false)
-      - name: Run smoke tests
+      # TODO: Merge https://github.com/firedrakeproject/pytest-mpi/pull/9
+      - name: (remove) install branch of pytest-mpi
         run: |
           . ../firedrake_venv/bin/activate
-          python -m pytest -v tests/regression/ \
-            -k "poisson_strong or stokes_mini or dg_advection" -m "not parallel"
-
-      - name: Run parallel smoke tests  # ideally in the same step as above
+          python -m pip install git+https://github.com/firedrakeproject/pytest-mpi.git@connorjward/fix-macos
+      - name: Run smoke tests
         run: |
           . ../firedrake_venv/bin/activate
-          mpiexec -n 3 python -m pytest -v tests/regression/ \
-            -k "poisson_strong or stokes_mini or dg_advection" -m "parallel[3]"
+          python -m pytest -v tests/regression/ -k "poisson_strong or stokes_mini or dg_advection"
         timeout-minutes: 30
       - name: Post-run cleanup
         if: ${{ always() }}