diff --git a/.github/workflows/typo3_13.yml b/.github/workflows/typo3_13.yml
index 248d63c..ee546dc 100644
--- a/.github/workflows/typo3_13.yml
+++ b/.github/workflows/typo3_13.yml
@@ -68,3 +68,28 @@ jobs:
 
       - name: 'Execute unit tests'
         run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -s unit
+
+  functional-tests:
+    name: Functional tests
+    needs: code-quality
+    runs-on: self-hosted
+
+    strategy:
+      matrix:
+        php:
+          - '8.2'
+          - '8.3'
+
+        vendor:
+          - mysql
+          - mariadb
+
+    steps:
+      - name: 'Checkout'
+        uses: actions/checkout@v4
+
+      - name: 'Install testing system'
+        run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -s composerUpdate
+
+      - name: 'Execute functional tests'
+        run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -d ${{ matrix.vendor }} -s functional
diff --git a/Classes/Helper/ExplainQueryHelper.php b/Classes/Helper/ExplainQueryHelper.php
index 9d8fa85..771d355 100644
--- a/Classes/Helper/ExplainQueryHelper.php
+++ b/Classes/Helper/ExplainQueryHelper.php
@@ -14,8 +14,7 @@
 use Doctrine\DBAL\Exception;
 use StefanFroemken\Mysqlreport\Configuration\ExtConf;
 use StefanFroemken\Mysqlreport\Domain\Model\QueryInformation;
-use TYPO3\CMS\Core\Database\Connection;
-use TYPO3\CMS\Core\Database\ConnectionPool;
+use StefanFroemken\Mysqlreport\Traits\DatabaseConnectionTrait;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 /**
@@ -23,6 +22,8 @@
  */
 readonly class ExplainQueryHelper
 {
+    use DatabaseConnectionTrait;
+
     /**
      * @param QueryInformation $queryInformation
      */
@@ -77,10 +78,4 @@ private function getExtConf(): ExtConf
     {
         return GeneralUtility::makeInstance(ExtConf::class);
     }
-
-    private function getDefaultConnection(): Connection
-    {
-        return GeneralUtility::makeInstance(ConnectionPool::class)
-            ->getConnectionByName(ConnectionPool::DEFAULT_CONNECTION_NAME);
-    }
 }
diff --git a/Tests/Functional/Configuration/ExtConfTest.php b/Tests/Functional/Configuration/ExtConfTest.php
new file mode 100644
index 0000000..8d83e35
--- /dev/null
+++ b/Tests/Functional/Configuration/ExtConfTest.php
@@ -0,0 +1,140 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the package stefanfroemken/mysqlreport.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace StefanFroemken\Mysqlreport\Tests\Functional\Configuration;
+
+use PHPUnit\Framework\Attributes\Test;
+use StefanFroemken\Mysqlreport\Configuration\ExtConf;
+use TYPO3\TestingFramework\Core\Functional\FunctionalTestCase;
+
+/**
+ * Test case.
+ */
+class ExtConfTest extends FunctionalTestCase
+{
+    private ExtConf $subject;
+
+    protected array $testExtensionsToLoad = [
+        'stefanfroemken/mysqlreport',
+    ];
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->subject = $this->get(ExtConf::class);
+    }
+
+    protected function tearDown(): void
+    {
+        unset(
+            $this->subject,
+        );
+
+        parent::tearDown();
+    }
+
+    #[Test]
+    public function isEnableFrontendLoggingInitiallyReturnsFalse(): void
+    {
+        self::assertFalse(
+            $this->subject->isEnableFrontendLogging(),
+        );
+    }
+
+    #[Test]
+    public function setEnableFrontendLoggingSetsEnableFrontendLogging(): void
+    {
+        $this->subject->setEnableFrontendLogging('1');
+
+        self::assertTrue(
+            $this->subject->isEnableFrontendLogging(),
+        );
+    }
+
+    #[Test]
+    public function isEnableBackendLoggingInitiallyReturnsFalse(): void
+    {
+        self::assertFalse(
+            $this->subject->isEnableBackendLogging(),
+        );
+    }
+
+    #[Test]
+    public function setEnableBackendLoggingSetsEnableBackendLogging(): void
+    {
+        $this->subject->setEnableBackendLogging('1');
+
+        self::assertTrue(
+            $this->subject->isEnableBackendLogging(),
+        );
+    }
+
+    #[Test]
+    public function isActivateExplainQueryInitiallyReturnsFalse(): void
+    {
+        self::assertFalse(
+            $this->subject->isActivateExplainQuery(),
+        );
+    }
+
+    #[Test]
+    public function setActivateExplainQuerySetsActivateExplainQuery(): void
+    {
+        $this->subject->setActivateExplainQuery('1');
+
+        self::assertTrue(
+            $this->subject->isActivateExplainQuery(),
+        );
+    }
+
+    #[Test]
+    public function getSlowQueryThresholdInitiallyReturns10Seconds(): void
+    {
+        self::assertSame(
+            10.0,
+            $this->subject->getSlowQueryThreshold(),
+        );
+    }
+
+    #[Test]
+    public function setSlowQueryThresholdWithIntegerSetsSlowQueryThreshold(): void
+    {
+        $this->subject->setSlowQueryThreshold('1');
+
+        self::assertSame(
+            1.0,
+            $this->subject->getSlowQueryThreshold(),
+        );
+    }
+
+    #[Test]
+    public function setSlowQueryThresholdWithFloatSetsSlowQueryThreshold(): void
+    {
+        $this->subject->setSlowQueryThreshold('1.25');
+
+        self::assertSame(
+            1.25,
+            $this->subject->getSlowQueryThreshold(),
+        );
+    }
+
+    #[Test]
+    public function setSlowQueryThresholdWithCommaFloatSetsSlowQueryThreshold(): void
+    {
+        $this->subject->setSlowQueryThreshold('5,38');
+
+        self::assertSame(
+            5.38,
+            $this->subject->getSlowQueryThreshold(),
+        );
+    }
+}
diff --git a/ext_emconf.php b/ext_emconf.php
index 438c03b..af5e50e 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -14,7 +14,7 @@
             'typo3' => '13.0.0-13.4.99',
         ],
         'conflicts' => [
-            'adminpanel',
+            'adminpanel' => '13.0.0-13.4.99',
         ],
         'suggests' => [
         ],