diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0d60910..b7a8075 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,35 +7,28 @@ on:
 
 jobs:
 
-  # Test
-  test:
+  # Lint
+  lint:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python: [3.9]
-
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v1
         with:
-          python-version: ${{ matrix.python }}
+          python-version: 3.9
       - name: Install dependencies
-        run: pip install tox tox-gh-actions -U pip
-      - name: Run tests
-        run: |
-          tox --skip-missing-interpreters=false --parallel
-        env:
-          TOX_PARALLEL_NO_SPINNER: 1
+        run: pip install tox -U pip
+      - name: Lint
+        run: tox -e package
 
   # Create a new semantic release
   release:
-    needs: test
+    needs: [lint]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.9
       - uses: cycjimmy/semantic-release-action@v2
         with:
           semantic_version: 17
diff --git a/MANIFEST.in b/MANIFEST.in
index 0ae7435..07c8b0c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -5,4 +5,4 @@ recursive-include grappelli_safe/templates *.html
 recursive-include grappelli_safe/locale *.mo *.po
 recursive-include grappelli_safe/models/fixtures *.json
 
-exclude .releaserc
+exclude .releaserc tox.ini
diff --git a/setup.cfg b/setup.cfg
index 8489fab..ff38b07 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -27,26 +27,3 @@ include_package_data = true
 
 [bdist_wheel]
 universal = 1
-
-# Testing
-
-[tox:tox]
-skip_missing_interpreters = true
-envlist =
-    package
-
-[testenv:package]
-# Check package integrity and compatibility with PyPI
-deps =
-    twine
-    check-manifest
-skip_install = true
-commands =
-    python setup.py -q sdist --dist-dir="{envtmpdir}/dist"
-    twine check "{envtmpdir}/dist/*"
-    check-manifest --ignore-bad-ideas '*.mo' {toxinidir}
-
-[gh-actions]
-# Connect GitHub Action matrices with tox envs
-python =
-    3.9: package
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..0a3cf7a
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,15 @@
+[tox]
+skip_missing_interpreters = true
+envlist =
+    package
+
+[testenv:package]
+# Check package integrity and compatibility with PyPI
+deps =
+    twine
+    check-manifest
+skip_install = true
+commands =
+    python setup.py -q sdist --dist-dir="{envtmpdir}/dist"
+    twine check "{envtmpdir}/dist/*"
+    check-manifest --ignore-bad-ideas '*.mo' {toxinidir}