diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 4b21b6c..0959099 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -13,6 +13,7 @@
 use Drupal\Core\Form\FormState;
 use Drupal\Core\Installer\Exception\AlreadyInstalledException;
 use Drupal\Core\Installer\Exception\InstallerException;
+use Drupal\Core\Installer\Exception\InstallProfileMismatchException;
 use Drupal\Core\Installer\Exception\NoProfilesException;
 use Drupal\Core\Installer\InstallerKernel;
 use Drupal\Core\Language\Language;
@@ -2187,13 +2188,16 @@ function install_display_requirements($install_state, $requirements) {
  *
  * @see _install_select_profile()
  *
+ * @throws \Drupal\Core\Installer\Exception\InstallProfileMismatchException
+ *
  * @deprecated in Drupal 8.3.0 and will be removed before Drupal 9.0.0. The
  *    install profile is written to core.extension.
  */
 function install_write_profile($install_state) {
   // Only need to write to settings.php if it is possible. The primary storage
   // for the install profile is the core.extension configuration.
-  if (is_writable(\Drupal::service('site.path') . '/settings.php')) {
+  $settings_path = \Drupal::service('site.path') . '/settings.php';
+  if (is_writable($settings_path)) {
     // Remember the profile which was used.
     $settings['settings']['install_profile'] = (object) array(
       'value' => $install_state['parameters']['profile'],
@@ -2201,4 +2205,7 @@ function install_write_profile($install_state) {
     );
     drupal_rewrite_settings($settings);
   }
+  elseif (($settings_profile = Settings::get('install_profile')) && $settings_profile !== $install_state['parameters']['profile']) {
+    throw new InstallProfileMismatchException($install_state['parameters']['profile'], $settings_profile, $settings_path, \Drupal::translation());
+  }
 }
diff --git a/core/lib/Drupal/Core/Installer/Exception/InstallProfileMismatchException.php b/core/lib/Drupal/Core/Installer/Exception/InstallProfileMismatchException.php
new file mode 100644
index 0000000..d679789
--- /dev/null
+++ b/core/lib/Drupal/Core/Installer/Exception/InstallProfileMismatchException.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Drupal\Core\Installer\Exception;
+
+use Drupal\Core\StringTranslation\TranslationInterface;
+
+/**
+ * Exception thrown if settings.php cannot be written and the chosen profile does not match.
+ */
+class InstallProfileMismatchException extends InstallerException {
+
+  /**
+   * Constructs a new InstallProfileMismatchException exception.
+   *
+   * @param string $selected_profile
+   *   The profile selected by _install_select_profile().
+   * @param string $settings_profile
+   *   The profile in settings.php.
+   * @param string $settings_file
+   *   The path to settigns.php.
+   * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
+   *   The string translation manager.
+   *
+   * @deprecated in Drupal 8.3.0 and will be removed before Drupal 9.0.0. The
+   *    install profile is written to core.extension.
+   *
+   * @see _install_select_profile()
+   * @see install_write_profile
+   */
+  public function __construct($selected_profile, $settings_profile, $settings_file, TranslationInterface $string_translation) {
+    $this->stringTranslation = $string_translation;
+
+    $title = $this->t('Install profile mismatch');
+    $message = $this->t(
+      'The selected profile %profile does not match the install_profile setting, which is %settings_profile. Cannot write updated setting to %settings_file.',
+      [
+        '%profile' => $selected_profile,
+        '%settings_profile' => $settings_profile,
+        '%settings_file' => $settings_file,
+      ]
+    );
+    parent::__construct($message, $title);
+  }
+
+}
diff --git a/core/modules/system/src/Tests/Installer/InstallerExistingSettingsMismatchProfileBrokenTest.php b/core/modules/system/src/Tests/Installer/InstallerExistingSettingsMismatchProfileBrokenTest.php
index 69a81c6..6d866f0 100644
--- a/core/modules/system/src/Tests/Installer/InstallerExistingSettingsMismatchProfileBrokenTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerExistingSettingsMismatchProfileBrokenTest.php
@@ -2,8 +2,6 @@
 
 namespace Drupal\system\Tests\Installer;
 
-use Drupal\Component\Render\FormattableMarkup;
-use Drupal\Component\Utility\Html;
 use Drupal\Core\DrupalKernel;
 use Drupal\simpletest\InstallerTestBase;
 use Drupal\Core\Database\Database;
@@ -17,12 +15,6 @@
 class InstallerExistingSettingsMismatchProfileBrokenTest extends InstallerTestBase {
 
   /**
-   * The excepted exception message thrown during the installer.
-   * @var string;
-   */
-  protected $exceptionMessage;
-
-  /**
    * {@inheritdoc}
    *
    * Configures a preexisting settings.php file without an install_profile
@@ -63,8 +55,6 @@ protected function setUp() {
     ];
     mkdir($this->settings['config_directories'][CONFIG_SYNC_DIRECTORY]->value, 0777, TRUE);
 
-    // @todo Remove HTML once https://www.drupal.org/node/2514044 is fixed.
-    $this->exceptionMessage = (string) new FormattableMarkup('Failed to modify %path. Verify the file permissions.', ['%path' => $this->siteDirectory . '/settings.php']);
     parent::setUp();
   }
 
@@ -111,21 +101,8 @@ protected function setUpSite() {
    * Verifies that installation did not succeed.
    */
   public function testBrokenInstaller() {
-    $this->assertRaw(Html::escape($this->exceptionMessage));
-    // The exceptions are expected. Do not interpret them as a test failure.
-    // Not using File API; a potential error must trigger a PHP warning.
-    unlink(\Drupal::root() . '/' . $this->siteDirectory . '/error.log');
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function error($message = '', $group = 'Other', array $caller = NULL) {
-    if ($group == 'Exception' && $message == $this->exceptionMessage) {
-      // Ignore the expected exception.
-      return FALSE;
-    }
-    return parent::error($message, $group, $caller);
+    $this->assertTitle('Install profile mismatch | Drupal');
+    $this->assertText("The selected profile testing does not match the install_profile setting, which is minimal. Cannot write updated setting to {$this->siteDirectory}/settings.php.");
   }
 
 }