Make good use of the turnip syntax in Behat 3

registration.feature

Feature: registration

    Scenario: I cannot register with an already registered email
        When I register with "tyrion@lannister.fr" as email
        Then I should see "Cet email est déjà utilisé"

    Scenario: the email should be valid
        When I register with "thisisnot@avalidemail" as email
        Then I should see "Cet email n'est pas valide"

    Scenario: I cannot register with an already registered nickname
        When I register with "Cersei" as nickname
        Then I should see "Ce pseudonyme est déjà pris"

    Scenario: I cannot register with a short password
        When I register with "chien" as password
        Then I should see "Pour plus de sécurité le mot de passe doit contenir au moins 6 caractères"

    Scenario: all fields are required at registration
        When I register with an empty form
        Then I should see "L'email est obligatoire"
        And I should see "Renseigne un mot de passe pour sécuriser ton compte"
        And I should see "Choisis toi un pseudonyme !"

RegistrationContext.php

<?php

namespace Context;

class RegistrationContext extends BaseContext
{
    /**
     * @When I go to the registration page
     */
    public function iGoToTheRegistrationPage()
    {
        $this->visit('/inscription');
    }    

    /**
     * @When I register with :email as email
     * @When I register with :nickname as nickname     
     * @When I register with :password as password
     */
    public function iRegisterWith($email = 'foo@bar.com', $nickname = 'FooBar', $password = 'foobar1337')
    {
        $this->iGoToTheRegistrationPage();
        $this->fillField('register_email', $email);
        $this->fillField('register_person_nickname', $nickname);
        $this->fillField('register_plainPassword_first', $password);
        $this->fillField('register_plainPassword_second', $password);

        $this->pressButton('register_registerButton');
    }    

    /**
     * @When I register with an empty form
     */
    public function iRegisterWithAnEmptyForm()
    {
        $this->iRegisterWith('', '', '');
    }
}

Great. Thank you!

juste line 7 => Scenario: the email should be valid
should be :
Scenario: the email should not be valid

It's no big deal