diff --git a/.github/workflows/run_pytest.yml b/.github/workflows/run_pytest.yml
index 27459f8..aa6a017 100644
--- a/.github/workflows/run_pytest.yml
+++ b/.github/workflows/run_pytest.yml
@@ -6,10 +6,10 @@ jobs:
   build:
 
     strategy:
-      max-parallel: 4
+      # max-parallel: 4
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: [3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7]
+        python-version: [3.5, 3.6, 3.7]
     runs-on: ${{matrix.os}}
     steps:
     - uses: actions/checkout@v1