diff --git a/relaxed.info.yml b/relaxed.info.yml
index 517b025..cd2a6ef 100644
--- a/relaxed.info.yml
+++ b/relaxed.info.yml
@@ -11,3 +11,5 @@ dependencies:
   - system (>=8.3.x)
 test_dependencies:
   - workspace
+  - key
+  - encrypt
diff --git a/tests/src/Functional/RelaxedEncryptTest.php b/tests/src/Functional/RelaxedEncryptTest.php
index e69de29..93e5b71 100644
--- a/tests/src/Functional/RelaxedEncryptTest.php
+++ b/tests/src/Functional/RelaxedEncryptTest.php
@@ -0,0 +1,72 @@
+<?php
+
+namespace Drupal\Tests\relaxed\Functional;
+
+use Drupal\encrypt\Entity\EncryptionProfile;
+use Drupal\key\Entity\Key;
+use Drupal\Tests\BrowserTestBase;
+
+class RelaxedEncryptTest extends BrowserTestBase {
+
+  /**
+   * Modules to enable for this test.
+   *
+   * @var string[]
+   */
+  public static $modules = [
+    'key',
+    'encrypt',
+    'encrypt_test',
+    'relaxed',
+    'replication',
+    'multiversion',
+    'key_value',
+    'serialization',
+    'rest',
+    'basic_auth'
+  ];
+
+  public function testEncryptIntegration() {
+    // Create a 256bit testkey.
+    $key_256 = Key::create([
+      'id' => 'testing_key_256',
+      'label' => 'Testing Key 256 bit',
+      'key_type' => "encryption",
+      'key_type_settings' => ['key_size' => '256'],
+      'key_provider' => 'config',
+      'key_provider_settings' => ['key_value' => 'mustbesixteenbitmustbesixteenbit'],
+    ]);
+    $key_256->save();
+
+    // Create an Encrption Profile.
+    $encryption_profile = EncryptionProfile::create([
+      'id' => 'encryption_profile',
+      'label' => 'Encryption profile',
+      'encryption_method' => 'test_encryption_method',
+      'encryption_key' => 'testing_key_256',
+    ]);
+    $encryption_profile->save();
+
+    // Login as root.
+    $this->drupalLogin($this->rootUser);
+
+    // Add a replication username and password, enable encryption and set
+    // encryption profile.
+    $this->drupalGet('/admin/config/relaxed/settings');
+    $page = $this->getSession()->getPage();
+    $page->fillField('edit-username', 'replication_user');
+    $page->fillField('edit-password', 'replication_password');
+    $page->checkField('edit-encrypt');
+    $page->selectFieldOption('edit-encrypt-profile', 'encryption_profile');
+    $page->pressButton('Save configuration');
+    $this->assertSession()->pageTextContains('The configuration options have been saved.');
+
+    $config = \Drupal::config('relaxed.settings');
+    $transformer = \Drupal::service('relaxed.sensitive_data.transformer');
+    // Make sure the password is not stored in plain text.
+    $this->assertNotEquals('replication_password', $config->get('password'));
+    // Make sure the decrypted password matches the one entered.
+    $this->assertEquals('replication_password', $transformer->get($config->get('password')));
+  }
+
+}