Revert "Separate os for python"

This reverts commit 621b97d.

.github/workflows/tox.yml

@@ -11,31 +11,12 @@ on:
     - cron: '0 6 * * 1'
 
 jobs:
-  test_latest:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ["3.8"]
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
-      - name: "Set up Python ${{ matrix.python-version }}"
-        uses: actions/setup-python@v2
-        with:
-          python-version: "${{ matrix.python-version }}"
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install tox tox-gh-actions
-      - name: "Run tox for ${{ matrix.python-version }}"
-        run: |
-          tox
-  test_2004:
+  tests:
     #python 3.6 not available on ubuntu-latest
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.6"]
+        python-version: ["3.6", "3.8"]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2