diff --git a/Tests/Authenticator/AccessTokenAuthenticatorTest.php b/Tests/Authenticator/AccessTokenAuthenticatorTest.php
index f1cbdc9..be6cc4e 100644
--- a/Tests/Authenticator/AccessTokenAuthenticatorTest.php
+++ b/Tests/Authenticator/AccessTokenAuthenticatorTest.php
@@ -177,7 +177,7 @@ public function testAccessTokenHeaderRegex(string $input, ?string $expectedToken
         $this->assertEquals($expectedToken, $token);
     }
 
-    public function provideAccessTokenHeaderRegex(): array
+    public static function provideAccessTokenHeaderRegex(): array
     {
         return [
             ['Bearer token', 'token'],