diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 103bf7c..c97f2ee 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,26 +23,55 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
-        compiler: [gnu, intel]
-        interface: [serial, mpi]
-        exclude:
-        - os: macos-latest
-          compiler: intel
+        os: []
+        compiler: []
+        mpi: []
+        interface: []
+        # os: [ubuntu-latest, macos-latest]
+        # compiler: [gnu, intel]
+        # interface: [serial, mpi]
+        # exclude:
+        # - os: macos-latest
+        #   compiler: intel
+        # include:
+        # - interface: serial
+        #   mpi: nompi
+        # - interface: mpi
+        #   os: ubuntu-latest
+        #   compiler: gnu
+        #   mpi: mpich
+        # - interface: mpi
+        #   os: ubuntu-latest
+        #   compiler: intel
+        #   mpi: impi
+        # - interface: mpi
+        #   os:  macos-latest
+        #   mpi: openmpi
         include:
-        - interface: serial
+        - os: ubuntu-lastest
+          compiler: gnu
           mpi: nompi
-        - interface: mpi
-          os: ubuntu-latest
+          interface: serial
+        - os: ubuntu-latest
           compiler: gnu
           mpi: mpich
-        - interface: mpi
-          os: ubuntu-latest
+          interface: mpi
+        - os: ubuntu-latest
+          compiler: intel
+          mpi: nompi
+          interface: serial
+        - os: ubuntu-latest
           compiler: intel
           mpi: impi
-        - interface: mpi
-          os:  macos-latest
+          interface: mpi
+        - os: macos-latest
+          compiler: gnu
+          mpi: nompi
+          interface: serial
+        - os: macos-latest
+          compiler: gnu
           mpi: openmpi
+          interface: mpi
 
     steps: