diff --git a/src/Authentication/Auth.php b/src/Authentication/Auth.php
index faee095..9e9fd84 100644
--- a/src/Authentication/Auth.php
+++ b/src/Authentication/Auth.php
@@ -7,7 +7,7 @@ use Illuminate\Support\Facades\Facade;
 /**
  * @method static void assertNotLoggedIn()
  * @method static void success(int $mglnr, string $password)
- * @method static void failed(int $mglnr, string $password)
+ * @method static void fails(int $mglnr, string $password)
  * @method static void assertLoggedInWith(int $mglnr, string $password)
  * @method static void assertNotLoggedInWith(int $mglnr, string $password)
  * @method static void assertLoggedIn()
diff --git a/src/Authentication/FakeCookie.php b/src/Authentication/FakeCookie.php
index c3a31c6..b20e812 100644
--- a/src/Authentication/FakeCookie.php
+++ b/src/Authentication/FakeCookie.php
@@ -53,7 +53,7 @@ class FakeCookie extends Authenticator
     /**
      * Reisters an account that cannot login with the given password.
      */
-    public function failed(int $mglnr, string $password): void
+    public function fails(int $mglnr, string $password): void
     {
         $this->invalidAccounts[] = ['mglnr' => $mglnr, 'password' => $password];
     }
diff --git a/tests/TestCase.php b/tests/TestCase.php
index e2c16c3..ae81957 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -46,7 +46,7 @@ class TestCase extends \Orchestra\Testbench\TestCase
     public function loginWithWrongCredentials(): Api
     {
         Auth::fake();
-        Auth::failed(12345, 'wrong');
+        Auth::fails(12345, 'wrong');
 
         return Nami::login(12345, 'wrong');
     }