diff --git a/manager-bundle/src/ContaoManager/Plugin.php b/manager-bundle/src/ContaoManager/Plugin.php
index 20395862f9e..0006dc8484c 100644
--- a/manager-bundle/src/ContaoManager/Plugin.php
+++ b/manager-bundle/src/ContaoManager/Plugin.php
@@ -68,6 +68,11 @@ class Plugin implements BundlePluginInterface, ConfigPluginInterface, RoutingPlu
      */
     private $dbalConnectionFactory;
 
+    public function __construct(callable $dbalConnectionFactory = null)
+    {
+        $this->dbalConnectionFactory = $dbalConnectionFactory ?: [DriverManager::class, 'getConnection'];
+    }
+
     /**
      * Sets the path to enable autoloading of legacy Contao modules.
      */
@@ -76,11 +81,6 @@ public static function autoloadModules(string $modulePath): void
         static::$autoloadModules = $modulePath;
     }
 
-    public function __construct(callable $dbalConnectionFactory = null)
-    {
-        $this->dbalConnectionFactory = $dbalConnectionFactory ?: [DriverManager::class, 'getConnection'];
-    }
-
     /**
      * {@inheritdoc}
      */
@@ -316,9 +316,6 @@ private function handlePrependLocale(array $extensionConfigs, ContainerBuilder $
     /**
      * Adds the database server version to the Doctrine DBAL configuration.
      *
-     * If there are no DB credentials yet (install tool), we have to set the
-     * server version to prevent a DBAL exception (see #1422).
-     *
      * @return array<string,array<string,array<string,array<string,mixed>>>>
      */
     private function addDefaultServerVersion(array $extensionConfigs, ContainerBuilder $container): array
@@ -344,7 +341,7 @@ private function addDefaultServerVersion(array $extensionConfigs, ContainerBuild
         // If there are no DB credentials yet (install tool), we have to set
         // the server version to prevent a DBAL exception (see #1422)
         try {
-            $connection = call_user_func($this->dbalConnectionFactory, $params);
+            $connection = \call_user_func($this->dbalConnectionFactory, $params);
             $connection->connect();
             $connection->close();
         } catch (DriverException $e) {
diff --git a/manager-bundle/tests/ContaoManager/PluginTest.php b/manager-bundle/tests/ContaoManager/PluginTest.php
index 38345a81584..befe0ba40ee 100644
--- a/manager-bundle/tests/ContaoManager/PluginTest.php
+++ b/manager-bundle/tests/ContaoManager/PluginTest.php
@@ -400,8 +400,15 @@ public function testRetrievesTheConnectionParametersFromTheConfiguration(): void
         ];
 
         $connection = $this->createMock(Connection::class);
-        $connection->expects($this->once())->method('connect');
-        $connection->expects($this->once())->method('close');
+        $connection
+            ->expects($this->once())
+            ->method('connect')
+        ;
+
+        $connection
+            ->expects($this->once())
+            ->method('close')
+        ;
 
         $dbalConnectionFactory = function ($params) use ($connection) {
             $this->assertSame(
@@ -411,6 +418,7 @@ public function testRetrievesTheConnectionParametersFromTheConfiguration(): void
                 ],
                 $params
             );
+
             return $connection;
         };