diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index bd2f95b90..ad086acff 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -30,6 +30,12 @@ jobs:
             sudo apt-get update
             sudo apt-get install libopenmpi-dev openmpi-bin
           fi;
+      - name: Install ubuntu dependencies
+        shell: bash -el {0}
+        run: |
+          if [ "${{ matrix.os }}" == "macos-latest" ]; then
+              brew install open-mpi
+          fi;
       - name: Install dependencies
         shell: bash -el {0}
         run: |