diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 1653526..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,48 +0,0 @@
-defaults: &defaults
-  steps:
-    # common php steps
-    - run: echo "http://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories
-    - run: if [ -n "$ADD_PACKAGES" ]; then apk -U add $ADD_PACKAGES; fi;
-    - run: if [ -n "$ADD_MODULES" ]; then docker-php-ext-install $ADD_MODULES; fi;
-    - run: echo "date.timezone = UTC" >> $(php --ini |grep Scan |awk '{print $NF}')/timezone.ini
-    - run: curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/bin --filename=composer
-
-    # pre-checkout steps
-
-    # checkout
-    - checkout
-
-    # post-checkout steps
-
-    # run tests
-    - run: composer install -n --prefer-dist
-    - run: php vendor/phpunit/phpunit/phpunit -c phpunit.xml --log-junit /tmp/test-results/phpunit/junit.xml
-    - store_test_results:
-        path: /tmp/test-results
-
-version: 2
-jobs:
-  build-php80:
-    <<: *defaults
-    docker:
-      - image: php:8.0-alpine
-  build-php81:
-    <<: *defaults
-    docker:
-      - image: php:8.1-alpine
-  build-php82:
-    <<: *defaults
-    docker:
-      - image: php:8.2-alpine
-  build-php83:
-    <<: *defaults
-    docker:
-      - image: php:8.3-alpine
-workflows:
-  version: 2
-  build:
-    jobs:
-      - build-php80
-      - build-php81
-      - build-php82
-#      - build-php83
diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
new file mode 100644
index 0000000..8bcaa73
--- /dev/null
+++ b/.github/workflows/unit-test.yml
@@ -0,0 +1,22 @@
+name: unit-test.yml
+on: [ push ]
+
+jobs:
+  unit-test:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest ]
+        php: [ '8.0', '8.1', '8.2', '8.3', '8.4' ]
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{matrix.php}}
+          coverage: xdebug
+          tools: composer, phpunit
+      - run: composer install -n --prefer-dist
+      - run: php vendor/phpunit/phpunit/phpunit -c phpunit.xml --coverage-clover=coverage.xml
+      - run: php vendor/bin/coverage-check coverage.xml 70
diff --git a/composer.json b/composer.json
index a857a7f..479fb9b 100644
--- a/composer.json
+++ b/composer.json
@@ -39,7 +39,8 @@
     "ext-xdebug": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "9.5.*"
+    "phpunit/phpunit": "^9",
+    "rregeer/phpunit-coverage-check": "^0.3.1"
   },
   "autoload": {
     "psr-4": {
diff --git a/tests/CubexTest.php b/tests/CubexTest.php
index 821a27f..9b663ee 100644
--- a/tests/CubexTest.php
+++ b/tests/CubexTest.php
@@ -395,6 +395,9 @@ public function testFromContext()
   public function testDir()
   {
     $cubex = $this->_cubex();
-    self::assertEquals(__DIR__ . '/.cubex/', Cubex::dir($cubex->getContext()));
+    self::assertEquals(
+      __DIR__ . DIRECTORY_SEPARATOR . '.cubex' . DIRECTORY_SEPARATOR,
+      Cubex::dir($cubex->getContext())
+    );
   }
 }