diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3e5ada6d..29992817 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -103,6 +103,47 @@ jobs:
         env:
           COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
           COVERALLS_RUN_LOCALLY: ${{ secrets.COVERALLS_RUN_LOCALLY }}
+  tests-directly-on-os:
+    name: Run tests on PHP ${{ matrix.php }} with ${{ matrix.composer }} dependency preference (${{ matrix.os }})
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        php: ${{ fromJson(needs.supported-versions-matrix.outputs.version) }}
+        composer: [lowest, current, highest]
+    needs:
+      - lint-yaml
+      - lint-json
+      - composer-install
+      - supported-checks-matrix
+      - supported-versions-matrix
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/wyrihaximusnet/php:${{ matrix.php }}-nts-buster-dev-root
+    steps:
+      - uses: actions/checkout@v1
+      - name: Cache composer packages
+        uses: actions/cache@v1
+        with:
+          path: ./vendor/
+          key: ${{ matrix.composer }}-${{ matrix.php }}-${{ hashFiles('**/composer.lock') }}
+      - name: Install Dependencies
+        run: (test -f vendor && true ) || composer update --prefer-lowest --no-progress --ansi --no-interaction --prefer-dist -o
+        if: matrix.composer == 'lowest'
+      - name: Install Dependencies
+        run: (test -f vendor && true ) || composer install --ansi --no-progress --no-interaction --prefer-dist -o
+        if: matrix.composer == 'current'
+      - name: Install Dependencies
+        run: (test -f vendor && true ) || composer update --ansi --no-progress --no-interaction --prefer-dist -o
+        if: matrix.composer == 'highest'
+      - name: Fetch Tags
+        run: git fetch --depth=1 origin +refs/tags/*:refs/tags/* || true
+        if: matrix.check == 'backward-compatibility-check'
+      - run: |
+         make unit-testing-raw mutation-testing-raw
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+          COVERALLS_RUN_LOCALLY: ${{ secrets.COVERALLS_RUN_LOCALLY }}
   qodana:
     name: Qodana
     runs-on: ubuntu-latest
@@ -169,6 +210,7 @@ jobs:
       - lint-yaml
       - lint-json
       - qa
+      - tests-directly-on-os
       - qodana
     runs-on: ubuntu-latest
     steps:
diff --git a/Makefile b/Makefile
index 1a71ce11..7f317515 100644
--- a/Makefile
+++ b/Makefile
@@ -52,9 +52,16 @@ unit-testing: ## Run tests
 	$(DOCKER_RUN) vendor/bin/phpunit --colors=always -c ./etc/qa/phpunit.xml --coverage-text --coverage-html ./var/tests-unit-coverage-html --coverage-clover ./var/tests-unit-clover-coverage.xml
 	$(DOCKER_RUN) test -n "$(COVERALLS_REPO_TOKEN)" && test -n "$(COVERALLS_RUN_LOCALLY)" && test -f ./var/tests-unit-clover-coverage.xml && vendor/bin/php-coveralls -v --coverage_clover ./build/logs/clover.xml --json_path ./var/tests-unit-clover-coverage-upload.json || true
 
+unit-testing-raw: ## Run tests ###
+	vendor/bin/phpunit --colors=always -c ./etc/qa/phpunit.xml --coverage-text --coverage-html ./var/tests-unit-coverage-html --coverage-clover ./var/tests-unit-clover-coverage.xml
+	test -n "$(COVERALLS_REPO_TOKEN)" && test -n "$(COVERALLS_RUN_LOCALLY)" && test -f ./var/tests-unit-clover-coverage.xml && vendor/bin/php-coveralls -v --coverage_clover ./build/logs/clover.xml --json_path ./var/tests-unit-clover-coverage-upload.json || true
+
 mutation-testing: ## Run mutation testing
 	$(DOCKER_RUN) vendor/bin/roave-infection-static-analysis-plugin --ansi --min-msi=100 --min-covered-msi=100 --threads=$(THREADS) --ignore-msi-with-no-mutations || (cat ./var/infection.log && false)
 
+mutation-testing-raw: ## Run mutation testing ###
+	vendor/bin/roave-infection-static-analysis-plugin --ansi --min-msi=100 --min-covered-msi=100 --threads=$(THREADS) --ignore-msi-with-no-mutations || (cat ./var/infection.log && false)
+
 composer-require-checker: ## Ensure we require every package used in this package directly
 	$(DOCKER_RUN) vendor/bin/composer-require-checker --ignore-parse-errors --ansi -vvv --config-file=./etc/qa/composer-require-checker.json