diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ce9f6e4..a212b48 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,6 +20,7 @@ jobs:
       matrix:
         python-version: ["3.9", "3.10", "3.11", "3.12"]
         mpi-dist: ["openmpi", "mpich"]
+        mpipy-version: ["~=3.0", "~=4.0"]
     steps:
 
     - uses: actions/checkout@v4
@@ -31,7 +32,9 @@ jobs:
 
     - name: Install OpenMPI
       if: matrix.mpi-dist == 'openmpi'
-      run: sudo apt-get install -y -q openmpi-bin libopenmpi-dev
+      run: |
+        sudo apt-get install -y -q openmpi-bin libopenmpi-dev
+        mpiexec --version
 
     - name: Install MPICH
       if: matrix.mpi-dist == 'mpich'
@@ -41,6 +44,7 @@ jobs:
       run: |
         python -m pip install -U pip
         python -m pip install -e .[test]
+        python -m pip install mpi4py${{ matrix.mpipy-version }}
 
     - name: Test MPI
       run: |
diff --git a/tests/test_mpi.py b/tests/test_mpi.py
index 698526f..39a5c3b 100644
--- a/tests/test_mpi.py
+++ b/tests/test_mpi.py
@@ -38,6 +38,8 @@ def test_mpi(pool):
     for r in results:
         assert all([isclose(x, 42.01) for x in r])
 
+    print("All tests passed")
+
 
 if __name__ == "__main__":
     from schwimmbad.mpi import MPIPool
diff --git a/tests/test_mpi_with_dill.py b/tests/test_mpi_with_dill.py
index b7bb661..50d54ff 100644
--- a/tests/test_mpi_with_dill.py
+++ b/tests/test_mpi_with_dill.py
@@ -41,6 +41,8 @@ def test_mpi_with_dill():
 
     pool.close()
 
+    print("All tests passed")
+
 
 if __name__ == "__main__":
     test_mpi_with_dill()