diff --git a/core/modules/aggregator/aggregator.processor.inc b/core/modules/aggregator/aggregator.processor.inc
index 79261b6186b3ea09153f53d3868aee7e31f4ca64..097cd1e9fa6ffdfbbb62976caedf9a7e67fddc93 100644
--- a/core/modules/aggregator/aggregator.processor.inc
+++ b/core/modules/aggregator/aggregator.processor.inc
@@ -117,7 +117,7 @@ function aggregator_form_aggregator_admin_form_alter(&$form, $form_state) {
     $form['modules']['aggregator']['aggregator_teaser_length'] = array(
       '#type' => 'select',
       '#title' => t('Length of trimmed description'),
-      '#default_value' => 600,
+      '#default_value' => variable_get('aggregator_teaser_length', 600),
       '#options' => drupal_map_assoc(array(0, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000), '_aggregator_characters'),
       '#description' => t("The maximum number of characters used in the trimmed version of content.")
     );
diff --git a/core/modules/aggregator/aggregator.test b/core/modules/aggregator/aggregator.test
index c4f42a483ed102f6c0529003a1e4ca09b9d13a4c..381fb954610b5bf72f9d055618c64b739ce1353a 100644
--- a/core/modules/aggregator/aggregator.test
+++ b/core/modules/aggregator/aggregator.test
@@ -278,6 +278,37 @@ EOF;
   }
 }
 
+/**
+ * Tests aggregator configuration settings.
+ */
+class AggregatorConfigurationTestCase extends AggregatorTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Aggregator configuration',
+      'description' => 'Test aggregator settings page.',
+      'group' => 'Aggregator',
+    );
+  }
+
+  /**
+   * Tests the settings form to ensure the correct default values are used.
+   */
+  function testSettingsPage() {
+    $edit = array(
+      'aggregator_allowed_html_tags' => '<a>',
+      'aggregator_summary_items' => 10,
+      'aggregator_clear' => 3600,
+      'aggregator_category_selector' => 'select',
+      'aggregator_teaser_length' => 200,
+    );
+    $this->drupalPost('admin/config/services/aggregator/settings', $edit, t('Save configuration'));
+
+    foreach ($edit as $name => $value) {
+      $this->assertFieldByName($name, $value, t('"@name" has correct default value.', array('@name' => $name)));
+    }
+  }
+}
+
 class AddFeedTestCase extends AggregatorTestCase {
   public static function getInfo() {
     return array(