diff --git a/core/modules/image/lib/Drupal/image/Tests/ImageFieldDefaultImagesTest.php b/core/modules/image/lib/Drupal/image/Tests/ImageFieldDefaultImagesTest.php
index 40e380d..78a957f 100644
--- a/core/modules/image/lib/Drupal/image/Tests/ImageFieldDefaultImagesTest.php
+++ b/core/modules/image/lib/Drupal/image/Tests/ImageFieldDefaultImagesTest.php
@@ -43,10 +43,10 @@ function testDefaultImages() {
     // Create an image field and add an instance to the article content type.
     $field_name = strtolower($this->randomName());
     $field_settings = array(
-      'default_image' => array($default_images['field']->fid),
+      'default_image' => $default_images['field']->fid,
     );
     $instance_settings = array(
-      'default_image' => array($default_images['instance']->fid),
+      'default_image' => $default_images['instance']->fid,
     );
     $widget_settings = array(
       'preview_image_style' => 'medium',
@@ -63,7 +63,7 @@ function testDefaultImages() {
       'label' => $instance['label'],
       'required' => $instance['required'],
       'settings' => array(
-        'default_image' => array($default_images['instance2']->fid),
+        'default_image' => $default_images['instance2']->fid,
       ),
     );
     field_create_instance($instance2);
@@ -179,7 +179,7 @@ function testDefaultImages() {
     );
 
     // Upload a new default for the article's field instance.
-    $instance['settings']['default_image'] = array($default_images['instance_new']->fid);
+    $instance['settings']['default_image'] = $default_images['instance_new']->fid;
     field_update_instance($instance);
 
     // Confirm the new field instance default is used on the article field
@@ -218,7 +218,7 @@ function testDefaultImages() {
     );
 
     // Remove the instance default from articles.
-    $instance['settings']['default_image'] = NULL;
+    $instance['settings']['default_image'] = 0;
     field_update_instance($instance);
 
     // Confirm the article field instance default has been removed.
diff --git a/core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php b/core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php
index c30c686..f941953 100644
--- a/core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php
+++ b/core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php
@@ -230,7 +230,7 @@ function testImageFieldDefaultImage() {
     // Clear field info cache so the new default image is detected.
     field_info_cache_clear();
     $field = field_info_field($field_name);
-    $image = file_load($field['settings']['default_image'][0]);
+    $image = file_load($field['settings']['default_image']);
     $this->assertTrue($image->status == FILE_STATUS_PERMANENT, 'The default image status is permanent.');
     $default_output = theme('image', array('uri' => $image->uri));
     $this->drupalGet('node/' . $node->nid);
@@ -272,7 +272,7 @@ function testImageFieldDefaultImage() {
     field_info_cache_clear();
 
     $private_field = field_info_field($private_field_name);
-    $image = file_load($private_field['settings']['default_image'][0]);
+    $image = file_load($private_field['settings']['default_image']);
     $this->assertEqual('private', file_uri_scheme($image->uri), 'Default image uses private:// scheme.');
     $this->assertTrue($image->status == FILE_STATUS_PERMANENT, 'The default image status is permanent.');
     // Create a new node with no image attached and ensure that default private