diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageFieldsTest.php b/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageFieldsTest.php
index 1a8f65e..ec5ef3d 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageFieldsTest.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageFieldsTest.php
@@ -74,6 +74,7 @@ function testCRUDFields() {
     $this->addExistingField();
     $this->cardinalitySettings();
     $this->fieldListAdminPage();
+    $this->deleteFieldInstance();
   }
 
   /**
@@ -209,6 +210,17 @@ function cardinalitySettings() {
   }
 
   /**
+   * Tests deleting a field from the instance edit form.
+   */
+  protected function deleteFieldInstance() {
+    // Delete the field instance.
+    $instance_id = 'node.' . $this->type . '.' . $this->field_name;
+    $this->drupalGet('admin/structure/types/manage/' . $this->type . '/fields/' . $instance_id);
+    $this->drupalPost(NULL, array(), t('Delete field'));
+    $this->assertResponse(200);
+  }
+
+  /**
    * Asserts field settings are as expected.
    *
    * @param $bundle