diff --git a/tests/Application/.env b/tests/Application/.env
index f568fa7a..dff1da0e 100644
--- a/tests/Application/.env
+++ b/tests/Application/.env
@@ -25,5 +25,5 @@ JWT_PASSPHRASE=setono_sylius_gift_card_plugin_development
 # For Gmail as a transport, use: "gmail://username:password@localhost"
 # For a generic SMTP server, use: "smtp://localhost:25?encryption=&auth_mode="
 # Delivery is disabled by default via "null://localhost"
-MAILER_URL=smtp://localhost
+MAILER_URL=null://localhost
 ###< symfony/swiftmailer-bundle ###