What about this...

.coveragerc

@@ -1,6 +1,8 @@
 [run]
 source =
     ./
+plugins =
+    django_coverage_plugin
 
 omit =
     */migrations/*

.github/workflows/django.yml

@@ -11,13 +11,13 @@ jobs:
     env:
       IMGUR_UPLOAD_CLIENT_ID: ${{ secrets.IMGUR_UPLOAD_CLIENT_ID }}
       IMGUR_UPLOAD_CLIENT_SECRET: ${{ secrets.IMGUR_UPLOAD_CLIENT_SECRET }}
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     runs-on: ubuntu-latest
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     strategy:
       max-parallel: 1
       matrix:
         python-version: [3.8]
-
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}
@@ -34,7 +34,7 @@ jobs:
       - name: Install Dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pycodestyle
+          pip install pycodestyle coverage coveralls django_coverage_plugin
           pip install -r requirements.txt
           python manage.py collectstatic --noinput
       - name: Basic Checks
@@ -42,17 +42,7 @@ jobs:
           pycodestyle . --exclude=migrations,importer*
           python manage.py check
           python manage.py makemigrations --check --dry-run
-
-  test:
-    runs-on: ubuntu-latest
-    container: python:3-slim
-    needs: build
-    env:
-      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-    steps:
-      - name: Install Dependencies
-        run: pip install coverage coveralls
       - name: Run Tests
-        run: coverage run python manage.py test --verbosity=2
-      - name: Upload coverage data to coveralls.io
-        run: coveralls
+        run: |
+          coverage run manage.py test --verbosity=2
+          coveralls --service=github