diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index a68f44c2..7db199c7 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.6", "3.8"]
+        python-version: ["3.6.15", "3.8.18"]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -27,7 +27,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install tox tox-gh-actions
+          pip install -r requirements-ci.txt
       - name: "Run tox for ${{ matrix.python-version }}"
         run: |
-          tox
+          make all
diff --git a/requirements-ci.txt b/requirements-ci.txt
new file mode 100644
index 00000000..3fa96f9a
--- /dev/null
+++ b/requirements-ci.txt
@@ -0,0 +1,4 @@
+# Different versions of tox are required by python version
+tox-gh-actions
+tox==3.28.0 ; python_version == "3.6"
+tox==4.6.4 ; python_version == "3.8"