diff --git a/tests/Components/RedirectHandler/RedirectHandlerTest.php b/tests/Components/RedirectHandler/RedirectHandlerTest.php
index d0cacedd..5c4aba76 100644
--- a/tests/Components/RedirectHandler/RedirectHandlerTest.php
+++ b/tests/Components/RedirectHandler/RedirectHandlerTest.php
@@ -16,6 +16,7 @@
 class RedirectHandlerTest extends TestCase
 {
     use KernelTestBehaviour;
+    private const APP_SECRET = 's$cretf0rt3st';
 
     public function testItEncodesUrlWithoutDatabase(): void
     {
@@ -33,7 +34,7 @@ public function testItEncodesUrlWithoutDatabase(): void
         $redirectHandler = new RedirectHandler(
             $connection,
             $router,
-            $this->getContainer()->getParameter('env.app_secret')
+            self::APP_SECRET
         );
 
         $url = $redirectHandler->encode('the-url');
@@ -52,7 +53,7 @@ public function testItEncodesUrlWithDatabase(): array
         $redirectHandler = new RedirectHandler(
             $connection,
             $router,
-            $this->getContainer()->getParameter('env.app_secret')
+            self::APP_SECRET
         );
 
         $originalUrl = 'the-url';
@@ -83,7 +84,7 @@ public function testItDecodesHashWithDatabase(array $data): void
         $redirectHandler = new RedirectHandler(
             $connection,
             $router,
-            $this->getContainer()->getParameter('env.app_secret')
+            self::APP_SECRET
         );
 
         $originalUrl = $redirectHandler->decode($data['hash']);
@@ -120,7 +121,7 @@ public function testItThrowsExceptionOnDecodingWithMissingUrl(): void
         $redirectHandler = new RedirectHandler(
             $connection,
             $router,
-            $this->getContainer()->getParameter('env.app_secret')
+            self::APP_SECRET
         );
 
         $this->expectException(\RuntimeException::class);
@@ -140,7 +141,7 @@ public function testItCleansUpOldUrls(): void
         $redirectHandler = new RedirectHandler(
             $connection,
             $router,
-            $this->getContainer()->getParameter('env.app_secret')
+            self::APP_SECRET
         );
 
         $redirectHandler->encode('the-url-1');