diff --git a/.github/workflows/spack-matrix.yml b/.github/workflows/spack-matrix.yml
index bc0b2621..b7115ee3 100644
--- a/.github/workflows/spack-matrix.yml
+++ b/.github/workflows/spack-matrix.yml
@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/setup-python@v6
         with:
-          python-version: '3.13'
+          python-version: '3.14'
       - uses: actions/checkout@v5
         with:
           fetch-depth: 2
@@ -157,7 +157,7 @@ jobs:
       fail-fast: false
       matrix:
         version: ["main", "0.10", "0.9", "0.8"]
-        python-version: ["3.10", "3.13"]
+        python-version: ["3.10", "3.13", "3.14"]
         # NOTE: Overspecification of %%clang@18 to fix ABI issues (std::string related?).
         # NOTE: clang sometimes likes stub or Intel MPI.
         spec: ["build_type=Developer +petsc4py +slepc4py %%gcc@13 ^petsc+mumps ^fenics-dolfinx+adios2 ^mpich",
@@ -190,7 +190,7 @@ jobs:
           spack stage py-fenics-dolfinx@${{ matrix.version }} ${{ matrix.spec }} ^python@${{ matrix.python-version }}
           spack cd py-fenics-dolfinx@${{ matrix.version }} ${{ matrix.spec }} ^python@${{ matrix.python-version }}
           python -m pytest -n auto -m "not petsc4py and not adios2" -k "not test_cffi_expression and not test_cube_distance" python/test/unit
-          mpiexec -n 3 python -m pytest -m "not petsc4py and not adios2" -k "not test_cffi_expression and not test_cube_distance" python/test/unit
+          mpiexec -n 3 python -m pytest -m "not petsc4py and not adios2" -k "not test_cffi_expression and not test_cube_distance and not test_mpi_comm_refcount" python/test/unit
       # NOTE: 0.8 tests run very slow - skip?
       - name: Run tests (not 0.8 and not 0.9)
         if: ${{ matrix.version != '0.8' && matrix.version != '0.9'}}