diff --git a/modules/jwt_auth_issuer/Tests/Controller/JwtAuthIssuerControllerTest.php b/modules/jwt_auth_issuer/Tests/Controller/JwtAuthIssuerControllerTest.php
index 5e39066..b1c901a 100644
--- a/modules/jwt_auth_issuer/Tests/Controller/JwtAuthIssuerControllerTest.php
+++ b/modules/jwt_auth_issuer/Tests/Controller/JwtAuthIssuerControllerTest.php
@@ -20,7 +20,7 @@ class JwtAuthIssuerControllerTest extends WebTestBase {
    *
    * @var Firebase\JWT\JWT
    */
-  protected $jwt_firebase_php-jwt;
+  protected $jwt_firebase_php_jwt;
   /**
    * {@inheritdoc}
    */