diff --git a/core/includes/image.inc b/core/includes/image.inc
index f6ae7f1..e8e0b0b 100644
--- a/core/includes/image.inc
+++ b/core/includes/image.inc
@@ -65,7 +65,7 @@ function image_get_toolkit() {
 
   if (!isset($toolkit)) {
     $toolkits = image_get_available_toolkits();
-    $toolkit = variable_get('image_toolkit', 'gd');
+    $toolkit = config('system.image')->get('toolkit');
     if (!isset($toolkits[$toolkit]) || !function_exists('image_' . $toolkit . '_load')) {
       // The selected toolkit isn't available so return the first one found. If
       // none are available this will return FALSE.
diff --git a/core/modules/image/lib/Drupal/image/Tests/ImageEffectsTest.php b/core/modules/image/lib/Drupal/image/Tests/ImageEffectsTest.php
index 0456162..69a1e09 100644
--- a/core/modules/image/lib/Drupal/image/Tests/ImageEffectsTest.php
+++ b/core/modules/image/lib/Drupal/image/Tests/ImageEffectsTest.php
@@ -23,7 +23,7 @@ class ImageEffectsTest extends ToolkitTestBase {
   }
 
   function setUp() {
-    parent::setUp('image_test');
+    parent::setUp();
     module_load_include('inc', 'image', 'image.effects');
   }
 
diff --git a/core/modules/system/config/system.image.gd.yml b/core/modules/system/config/system.image.gd.yml
new file mode 100644
index 0000000..fbc379f
--- /dev/null
+++ b/core/modules/system/config/system.image.gd.yml
@@ -0,0 +1 @@
+jpeg_quality: '75'
diff --git a/core/modules/system/config/system.image.yml b/core/modules/system/config/system.image.yml
new file mode 100644
index 0000000..9a1688f
--- /dev/null
+++ b/core/modules/system/config/system.image.yml
@@ -0,0 +1 @@
+toolkit: gd
diff --git a/core/modules/system/image.gd.inc b/core/modules/system/image.gd.inc
index f6f12ae..0bf5fb7 100644
--- a/core/modules/system/image.gd.inc
+++ b/core/modules/system/image.gd.inc
@@ -25,7 +25,7 @@ function image_gd_settings() {
       '#description' => t('Define the image quality for JPEG manipulations. Ranges from 0 to 100. Higher values mean better image quality but bigger files.'),
       '#min' => 0,
       '#max' => 100,
-      '#default_value' => variable_get('image_jpeg_quality', 75),
+      '#default_value' => config('system.image.gd')->get('jpeg_quality'),
       '#field_suffix' => t('%'),
     );
 
@@ -38,6 +38,19 @@ function image_gd_settings() {
 }
 
 /**
+ * Form submission handler for image_gd_settings().
+ *
+ * @see system_image_toolkit_settings_submit
+ */
+function image_gd_settings_submit($form, &$form_state) {
+  if (isset($form_state['values']['image_jpeg_quality'])) {
+    config('system.image.gd')
+      ->set('jpeg_quality', $form_state['values']['image_jpeg_quality'])
+      ->save();
+  }
+}
+
+/**
  * Verify GD2 settings (that the right version is actually installed).
  *
  * @return
@@ -269,7 +282,7 @@ function image_gd_save(stdClass $image, $destination) {
     return FALSE;
   }
   if ($extension == 'jpeg') {
-    $success = $function($image->resource, $destination, variable_get('image_jpeg_quality', 75));
+    $success = $function($image->resource, $destination, config('system.image.gd')->get('jpeg_quality'));
   }
   else {
     // Always save PNG images with full transparency.
diff --git a/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTestBase.php b/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTestBase.php
index 477475b..140d744 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTestBase.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTestBase.php
@@ -19,7 +19,7 @@ abstract class ToolkitTestBase extends WebTestBase {
   protected $image;
 
   function setUp() {
-    parent::setUp('image_test');
+    parent::setUp(array('image', 'image_test'));
 
     // Use the image_test.module's test toolkit.
     $this->toolkit = 'test';
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index 2947245..9cba7a3 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -1854,31 +1854,19 @@ function system_file_system_settings() {
  * Form builder; Configure site image toolkit usage.
  *
  * @ingroup forms
- * @see system_settings_form()
+ * @see system_image_toolkit_settings_submit()
  */
-function system_image_toolkit_settings() {
+function system_image_toolkit_settings($form, &$form_state) {
+  $config = config('system.image');
   $toolkits_available = image_get_available_toolkits();
   $current_toolkit = image_get_toolkit();
 
-  if (count($toolkits_available) == 0) {
-    variable_del('image_toolkit');
-    $form['image_toolkit_help'] = array(
-      '#markup' => t("No image toolkits were detected. Drupal includes support for <a href='!gd-link'>PHP's built-in image processing functions</a> but they were not detected on this system. You should consult your system administrator to have them enabled, or try using a third party toolkit.", array('gd-link' => url('http://php.net/gd'))),
-    );
-    return $form;
-  }
-
-  if (count($toolkits_available) > 1) {
-    $form['image_toolkit'] = array(
-      '#type' => 'radios',
-      '#title' => t('Select an image processing toolkit'),
-      '#default_value' => variable_get('image_toolkit', $current_toolkit),
-      '#options' => $toolkits_available
-    );
-  }
-  else {
-    variable_set('image_toolkit', key($toolkits_available));
-  }
+  $form['image_toolkit'] = array(
+    '#type' => 'radios',
+    '#title' => t('Select an image processing toolkit'),
+    '#default_value' => $config->get('toolkit'),
+    '#options' => $toolkits_available,
+  );
 
   // Get the toolkit's settings form.
   $function = 'image_' . $current_toolkit . '_settings';
@@ -1886,7 +1874,23 @@ function system_image_toolkit_settings() {
     $form['image_toolkit_settings'] = $function();
   }
 
-  return system_settings_form($form);
+  return system_config_form($form, $form_state);
+}
+
+/**
+ * Form submission handler for system_image_toolkit_settings().
+ */
+function system_image_toolkit_settings_submit($form, &$form_state) {
+  config('system.image')
+    ->set('toolkit', $form_state['values']['image_toolkit'])
+    ->save();
+
+  // Call the form submit handler for the current toolkit. Calling
+  // image_get_toolkit() does the necessary includes.
+  $function = 'image_' . $form_state['values']['image_toolkit'] . '_settings_submit';
+  if (function_exists($function)) {
+    $function($form, $form_state);
+  }
 }
 
 /**
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 96c02c3..ec71725 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -1997,6 +1997,21 @@ function system_update_8014() {
   $config->save();
 }
 
+
+/**
+ * Moves image toolkit settings from variable to config.
+ *
+ * @ingroup config_upgrade
+ */
+function system_update_8015() {
+  update_variables_to_config('system.image', array(
+    'image_toolkit' => 'toolkit',
+  ));
+  update_variables_to_config('system.image.gd', array(
+    'image_jpeg_quality' => 'jpeg_quality',
+  ));
+}
+
 /**
  * @} End of "defgroup updates-7.x-to-8.x".
  * The next series of updates should start at 9000.