Add PHPUnit as dev dependency

This makes it easier to run the tests locally.

.github/workflows/ci.yml

@@ -33,15 +33,14 @@ jobs:
                   coverage: "none"
                   php-version: ${{ matrix.php-version }}
                   ini-values: memory_limit=-1
-                  tools: phpunit:11.3
 
             - name: "Add PHPUnit matcher"
               run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
 
             - run: composer install
 
             - name: "Run tests"
-              run: phpunit
+              run: vendor/bin/phpunit
 
     extension-tests:
         needs:
@@ -79,7 +78,6 @@ jobs:
                   coverage: "none"
                   php-version: ${{ matrix.php-version }}
                   ini-values: memory_limit=-1
-                  tools: phpunit:11.3
 
             - name: "Add PHPUnit matcher"
               run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
@@ -97,7 +95,7 @@ jobs:
               working-directory: extra/${{ matrix.extension }}
               env:
                   LANG: 'en_US.UTF-8'
-              run: phpunit
+              run: vendor/bin/phpunit
 
     integration-tests:
         if: "false" # TODO re-enable that job when Drupal does not use features deprecated in 3.x anymore

composer.json

@@ -32,7 +32,8 @@
     },
     "require-dev": {
         "psr/container": "^1.0|^2.0",
-        "phpstan/phpstan": "^2.0"
+        "phpstan/phpstan": "^2.0",
+        "phpunit/phpunit": "^11.4"
     },
     "autoload": {
         "psr-4" : {

phpunit.xml.dist

@@ -5,7 +5,7 @@
          processIsolation="false"
          stopOnFailure="false"
          bootstrap="vendor/autoload.php"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.3/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
          cacheDirectory=".phpunit.cache"
          backupStaticProperties="false"
          failOnDeprecation="true"