diff --git a/.github/workflows/unittest-mpich.yml b/.github/workflows/unittest-mpich.yml
index 2d32edc5..ac568ccc 100644
--- a/.github/workflows/unittest-mpich.yml
+++ b/.github/workflows/unittest-mpich.yml
@@ -40,11 +40,6 @@ jobs:
           label: linux-64-py-3-9-mpich
           prefix: /usr/share/miniconda3/envs/my-env
 
-        - operating-system: ubuntu-latest
-          python-version: 3.8
-          label: linux-64-py-3-8-mpich
-          prefix: /usr/share/miniconda3/envs/my-env
-
     steps:
     - uses: actions/checkout@v2
     - uses: conda-incubator/setup-miniconda@v2.2.0
diff --git a/.github/workflows/unittest-openmpi.yml b/.github/workflows/unittest-openmpi.yml
index 9080055f..e36b7966 100644
--- a/.github/workflows/unittest-openmpi.yml
+++ b/.github/workflows/unittest-openmpi.yml
@@ -40,11 +40,6 @@ jobs:
           label: linux-64-py-3-9-openmpi
           prefix: /usr/share/miniconda3/envs/my-env
 
-        - operating-system: ubuntu-latest
-          python-version: 3.8
-          label: linux-64-py-3-8-openmpi
-          prefix: /usr/share/miniconda3/envs/my-env
-
     steps:
     - uses: actions/checkout@v2
     - uses: conda-incubator/setup-miniconda@v2.2.0