diff --git a/.github/workflows/django-package.yml b/.github/workflows/django-package.yml
index 03e23821..40e9a667 100644
--- a/.github/workflows/django-package.yml
+++ b/.github/workflows/django-package.yml
@@ -11,45 +11,250 @@ jobs:
       DJANGO_SETTINGS_MODULE: settings
       SECRET_KEY: this_is_no_secret_at_all
     strategy:
+      max-parallel: 4
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        include:
+          - python-version: 3.7
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.10
+
+          - python-version: 3.7
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.7
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.7
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.7
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.7
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.7
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.7
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.7
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.7
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.7
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.7
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.8
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.10
+
+          - python-version: 3.8
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.8
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.8
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.8
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.8
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.8
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.8
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.8
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.8
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.8
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.8
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.8
+            django-version: Django==4.0
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.8
+            django-version: Django==4.0
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.8
+            django-version: Django==4.0
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.8
+            django-version: Django==4.0
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.8
+            django-version: Django==4.1
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.8
+            django-version: Django==4.1
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.8
+            django-version: Django==4.1
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.8
+            django-version: Django==4.1
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.9
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.9
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.9
+            django-version: Django==2.2
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.9
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.9
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.9
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.9
+            django-version: Django==3.1
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.9
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.9
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.9
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.9
+            django-version: Django==3.2
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.9
+            django-version: Django==4.0
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.9
+            django-version: Django==4.0
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.9
+            django-version: Django==4.0
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.9
+            django-version: Django==4.0
+            djangorestframework-version: djangorestframework==3.14
+
+          - python-version: 3.9
+            django-version: Django==4.1
+            djangorestframework-version: djangorestframework==3.11
+
+          - python-version: 3.9
+            django-version: Django==4.1
+            djangorestframework-version: djangorestframework==3.12
+
+          - python-version: 3.9
+            django-version: Django==4.1
+            djangorestframework-version: djangorestframework==3.13
+
+          - python-version: 3.9
+            django-version: Django==4.1
+            djangorestframework-version: djangorestframework==3.14
 
     steps:
-    - 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
-        python -m pip install mypy flake8 pytest pytest-xdist flaky
-        if [ -f testproject/requirements.txt ]; then pip install -r testproject/requirements.txt; fi
-        ln -s $(pwd)/trench/ $(pwd)/testproject/trench
-    - name: Lint trench package with flake8
-      run: |
-        # Stop the build if there are Python syntax errors or undefined names.
-        flake8 ./trench/ --count --select=E9,F63,F7,F82 --show-source --statistics
-        # Exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide.
-        flake8 ./trench/ --count --exit-zero --max-complexity=10 --statistics
-    - name: Check trench package's type hints with mypy
-      run: |
-        mypy ./trench/
-    - name: Lint testproject with flake8
-      run: |
-        # Stop the build if there are Python syntax errors or undefined names.
-        flake8 ./testproject/ --count --select=E9,F63,F7,F82 --show-source --statistics
-        # Exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide.
-        flake8 ./testproject/ --count --exit-zero --max-complexity=10 --statistics
-    - name: Check testproject's type hints with mypy
-      run: |
-        mypy ./testproject/
-    - name: Test with pytest
-      run: |
-        python -m pytest -n 8 --cov-report=xml --cov=testproject/trench testproject/tests/
-    - uses: codecov/codecov-action@v1
-      with:
-        files: ./coverage.xml
-        fail_ci_if_error: true
-        name: trench
-        verbose: true
+      - 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
+          python -m pip install mypy flake8 pytest pytest-xdist flaky
+          python -m pip install ${{ matrix.django-version }} ${{ matrix.djangorestframework-version }}
+          if [ -f testproject/requirements_test.txt ]; then pip install -r testproject/requirements_test.txt; fi
+          ln -s $(pwd)/trench/ $(pwd)/testproject/trench
+      - name: Lint trench package with flake8
+        run: |
+          # Stop the build if there are Python syntax errors or undefined names.
+          flake8 ./trench/ --count --select=E9,F63,F7,F82 --show-source --statistics
+          # Exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide.
+          flake8 ./trench/ --count --exit-zero --max-complexity=10 --statistics
+      - name: Check trench package's type hints with mypy
+        run: |
+          mypy ./trench/
+      - name: Lint testproject with flake8
+        run: |
+          # Stop the build if there are Python syntax errors or undefined names.
+          flake8 ./testproject/ --count --select=E9,F63,F7,F82 --show-source --statistics
+          # Exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide.
+          flake8 ./testproject/ --count --exit-zero --max-complexity=10 --statistics
+      - name: Check testproject's type hints with mypy
+        run: |
+          mypy ./testproject/
+      - name: Test with pytest
+        run: |
+          python -m pytest -n 8 --cov-report=xml --cov=testproject/trench testproject/tests/
+      - uses: codecov/codecov-action@v1
+        with:
+          files: ./coverage.xml
+          fail_ci_if_error: true
+          name: trench
+          verbose: true
diff --git a/README.rst b/README.rst
index 8d5e47cd..3f12b2ba 100644
--- a/README.rst
+++ b/README.rst
@@ -150,3 +150,9 @@ the package (steps 6-7) for the changes to be present during e.g. running the te
     .. code-block:: shell
 
         pytest -n 8 --cov=testproject/trench testproject/tests/
+
+9. [OPTIONAL] Check GitHub workflows locally (https://github.com/nektos/act):
+
+    .. code-block:: shell
+
+        act --container-architecture linux/amd64
diff --git a/testproject/requirements_test.txt b/testproject/requirements_test.txt
new file mode 100644
index 00000000..7914c65f
--- /dev/null
+++ b/testproject/requirements_test.txt
@@ -0,0 +1,20 @@
+django-environ==0.4.5
+django-cors-headers==3.7.0
+djangorestframework-simplejwt>=4.8.0
+pyotp>=2.6.0
+twilio>=7.0.0
+yubico-client>=1.13.0
+smsapi-client>=2.4.5
+pyjwt<=2.0.1
+
+drf-spectacular==0.22.1
+
+pytest==6.2.3
+pytest-cov==2.11.1
+pytest-django==4.1.0
+attrs==20.3.0
+coverage==5.5
+flaky==3.7.0
+
+isort
+flake8