.../Tests/EntityReferenceIntegrationTest.php          | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Tests/EntityReferenceIntegrationTest.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Tests/EntityReferenceIntegrationTest.php
index 3a892b2..c6ec83d 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Tests/EntityReferenceIntegrationTest.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Tests/EntityReferenceIntegrationTest.php
@@ -65,6 +65,7 @@ public function setUp() {
    * Tests the entity reference field with all its supported field widgets.
    */
   public function testSupportedEntityTypesAndWidgets() {
+    $user_id = mt_rand(128, 256);
     foreach ($this->getTestEntities() as $referenced_entities) {
       $this->fieldName = 'field_test_' . $referenced_entities[0]->getEntityTypeId();
 
@@ -75,9 +76,14 @@ public function testSupportedEntityTypesAndWidgets() {
       entity_get_form_display($this->entityType, $this->bundle, 'default')->setComponent($this->fieldName)->save();
 
       $entity_name = $this->randomName();
+      $user_id++;
+      entity_create('user', array(
+        'uid' => $user_id,
+        'name' => $this->randomName(),
+      ))->save();
       $edit = array(
         'name' => $entity_name,
-        'user_id' => mt_rand(0, 128),
+        'user_id' => $user_id,
         $this->fieldName . '[0][target_id]' => $referenced_entities[0]->label() . ' (' . $referenced_entities[0]->id() . ')',
         $this->fieldName . '[1][target_id]' => $referenced_entities[1]->label() . ' (' . $referenced_entities[1]->id() . ')',
       );
@@ -98,9 +104,14 @@ public function testSupportedEntityTypesAndWidgets() {
       $entity_name = $this->randomName();
       $target_id = $referenced_entities[0]->label() . ' (' . $referenced_entities[0]->id() . ')';
       $target_id .= ', ' . $referenced_entities[1]->label() . ' (' . $referenced_entities[1]->id() . ')';
+      $user_id++;
+      entity_create('user', array(
+        'uid' => $user_id,
+        'name' => $this->randomName(),
+      ))->save();
       $edit = array(
         'name' => $entity_name,
-        'user_id' => mt_rand(0, 128),
+        'user_id' => $user_id,
         $this->fieldName . '[target_id]' => $target_id,
       );
       $this->drupalPostForm($this->entityType . '/add', $edit, t('Save'));
@@ -164,9 +175,9 @@ protected function getTestEntities() {
     $config_entity_2 = entity_create('config_test', array('id' => $this->randomName(), 'label' => $this->randomName()));
     $config_entity_2->save();
 
-    $content_entity_1 = entity_create('entity_test', array('name' => $this->randomName()));
+    $content_entity_1 = entity_create('entity_test', array('name' => $this->randomName(), 'user_id' => 0));
     $content_entity_1->save();
-    $content_entity_2 = entity_create('entity_test', array('name' => $this->randomName()));
+    $content_entity_2 = entity_create('entity_test', array('name' => $this->randomName(), 'user_id' => 0));
     $content_entity_2->save();
 
     return array(