diff --git a/tests/Behat/AuthenticationContext.php b/tests/Behat/AuthenticationContext.php
index 4990e16..e485415 100644
--- a/tests/Behat/AuthenticationContext.php
+++ b/tests/Behat/AuthenticationContext.php
@@ -35,4 +35,29 @@ public function setConfigProxyInitialize(): void {
     $this->setConfig('cas.settings', 'proxy.initialize', TRUE);
   }
 
+  /**
+   * Blocks a user given its username.
+   *
+   * @var string $username
+   *   The name of the user to be blocked.
+   *
+   * @When the user :username is blocked
+   *
+   * @throws \Exception
+   *   Thrown when the user with the given name does not exist.
+   */
+  public function blockUser(string $username): void {
+    $users = \Drupal::entityTypeManager()
+      ->getStorage('user')
+      ->loadByProperties([
+        'name' => $username,
+      ]);
+    /** @var \Drupal\user\Entity\User $user */
+    $user = $users ? reset($users) : FALSE;
+    if ($user) {
+      $user->block();
+      $user->save();
+    }
+  }
+
 }
diff --git a/tests/features/ecas-login.feature b/tests/features/ecas-login.feature
index 745c38c..69ba5e7 100644
--- a/tests/features/ecas-login.feature
+++ b/tests/features/ecas-login.feature
@@ -34,3 +34,16 @@ Feature: Login through OE Authentication
     And I should not see the link "My account"
     And I should not see the link "Log out"
     And I should see the link "Log in"
+
+  Scenario: A blocked user should not be able to log in
+    Given the user "chucknorris" is blocked
+    When I am on the homepage
+    Then I should see the link "Log in"
+    And I should not see the link "Log out"
+
+    # When I try to log in again I will be denied access.
+    When I click "Log in"
+    And I fill in "Username or e-mail address" with "texasranger@chuck_norris.com.eu"
+    And I fill in "Password" with "Qwerty098"
+    And I press the "Login!" button
+    Then I should see "There was a problem logging in, please contact a site administrator."
diff --git a/tests/features/ecas-register.feature b/tests/features/ecas-register.feature
index d124947..4b0d1f5 100644
--- a/tests/features/ecas-register.feature
+++ b/tests/features/ecas-register.feature
@@ -9,4 +9,4 @@ Feature: Register through OE Authentication
     And I visit "/user/register"
 
     # Redirected to the Ecas mockup server.
-    Then I should see "Service Create an account"
+    Then I should see "Create an account"