diff --git a/core/modules/system/src/Tests/Installer/InstallerNotValidDatabaseSettingstest.php b/core/modules/system/src/Tests/Installer/InstallerNotValidDatabaseSettingstest.php
index 155ca92..080af39 100644
--- a/core/modules/system/src/Tests/Installer/InstallerNotValidDatabaseSettingstest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerNotValidDatabaseSettingstest.php
@@ -5,7 +5,7 @@
  * Contains \Drupal\system\Tests\Installer\InstallerNotValidDatabaseSettingstest.
  */
 
-namespace \Drupal\system\Tests\Installer;
+namespace Drupal\system\Tests\Installer;
 
 use Drupal\simpletest\InstallerTestBase;
 
@@ -15,6 +15,40 @@
  *
  * @group Installer
  */
-class InstallerExistingDatabaseSettingsTest extends InstallerTestBase {
-  
-}
\ No newline at end of file
+class InstallerNotValidDatabaseSettingstest extends InstallerTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    // Pre-configure database credentials in settings.php.
+    $connection_info = Database::getConnectionInfo();
+    unset($connection_info['default']['pdo']);
+    unset($connection_info['default']['init_commands']);
+
+    $this->settings['databases']['default'] = (object) array(
+      'value' => $connection_info,
+      'required' => TRUE,
+    );
+    parent::setUp();
+  }
+
+  /**
+   * For testing database failures.
+   */
+  public function testDatabaseMultipleFailure() {
+    // All database settings should be pre-configured, except password.
+    $values = $this->parameters['forms']['install_settings_form'];
+    $driver = $values['driver'];
+    $edit = array();
+    if (isset($values[$driver]['password']) && $values[$driver]['password'] === '') {
+      $edit = $this->translatePostValues(array(
+        $driver => array(
+          'password' => 'fhjhjj',
+        ),
+      ));
+    }
+    $this->drupalPostForm(NULL, $edit, $this->translations['Save and continue']);
+  }
+
+}