diff --git a/core/modules/system/src/Tests/Entity/Element/EntityAutocompleteElementFormTest.php b/core/modules/system/src/Tests/Entity/Element/EntityAutocompleteElementFormTest.php
index 0fdd9af..6cdef4d 100644
--- a/core/modules/system/src/Tests/Entity/Element/EntityAutocompleteElementFormTest.php
+++ b/core/modules/system/src/Tests/Entity/Element/EntityAutocompleteElementFormTest.php
@@ -259,7 +259,7 @@ public function testInvalidEntityAutocompleteElement() {
       ]);
     $form_builder->submitForm($this, $form_state);
     $this->assertEqual(count($form_state->getErrors()), 1);
-    $this->assertEqual($form_state->getErrors()['single'], t('The referenced entity (%type: %id) does not exist.', array('%type' => 'entity_test', '%id' => 42)));
+    $this->assertEqual($form_state->getErrors()['single'], t('This entity (%type: %id) cannot be referenced.', array('%type' => 'entity_test', '%id' => 42)));
 
     // Do the same tests as above but on an element with '#validate_reference'
     // set to FALSE.
diff --git a/core/modules/system/src/Tests/Entity/EntityReferenceFieldTest.php b/core/modules/system/src/Tests/Entity/EntityReferenceFieldTest.php
index f74410f..3195e1d 100644
--- a/core/modules/system/src/Tests/Entity/EntityReferenceFieldTest.php
+++ b/core/modules/system/src/Tests/Entity/EntityReferenceFieldTest.php
@@ -103,7 +103,7 @@ public function testEntityReferenceFieldValidation() {
     $entity->{$this->fieldName}->target_id = 9999;
     $violations = $entity->{$this->fieldName}->validate();
     $this->assertEqual($violations->count(), 1, 'Validation throws a violation.');
-    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%type: %id) does not exist.', array('%type' => $this->referencedEntityType, '%id' => 9999)));
+    $this->assertEqual($violations[0]->getMessage(), t('This entity (%type: %id) cannot be referenced.', array('%type' => $this->referencedEntityType, '%id' => 9999)));
 
     // @todo Implement a test case for invalid bundle references after
     //   https://www.drupal.org/node/2064191 is fixed.
diff --git a/core/modules/system/src/Tests/Entity/EntityValidationTest.php b/core/modules/system/src/Tests/Entity/EntityValidationTest.php
index aa85fa7..81951df 100644
--- a/core/modules/system/src/Tests/Entity/EntityValidationTest.php
+++ b/core/modules/system/src/Tests/Entity/EntityValidationTest.php
@@ -165,7 +165,7 @@ protected function checkValidation($entity_type) {
     $test_entity->set('user_id', 9999);
     $violations = $test_entity->validate();
     $this->assertEqual($violations->count(), 1, 'Validation failed.');
-    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%type: %id) does not exist.', array('%type' => 'user', '%id' => 9999)));
+    $this->assertEqual($violations[0]->getMessage(), t('This entity (%type: %id) cannot be referenced.', array('%type' => 'user', '%id' => 9999)));
 
     $test_entity = clone $entity;
     $test_entity->field_test_text->format = $this->randomString(33);
diff --git a/core/modules/system/src/Tests/Entity/ValidReferenceConstraintValidatorTest.php b/core/modules/system/src/Tests/Entity/ValidReferenceConstraintValidatorTest.php
index ef38189..d81a124 100644
--- a/core/modules/system/src/Tests/Entity/ValidReferenceConstraintValidatorTest.php
+++ b/core/modules/system/src/Tests/Entity/ValidReferenceConstraintValidatorTest.php
@@ -65,7 +65,7 @@ public function testValidation() {
 
     // Make sure the information provided by a violation is correct.
     $violation = $violations[0];
-    $this->assertEqual($violation->getMessage(), t('The referenced entity (%type: %id) does not exist.', array(
+    $this->assertEqual($violation->getMessage(), t('This entity (%type: %id) cannot be referenced.', array(
       '%type' => 'user',
       '%id' => $entity->id(),
     )), 'The message for invalid value is correct.');
diff --git a/core/modules/taxonomy/src/Tests/TermValidationTest.php b/core/modules/taxonomy/src/Tests/TermValidationTest.php
index b369737..a0db7fc 100644
--- a/core/modules/taxonomy/src/Tests/TermValidationTest.php
+++ b/core/modules/taxonomy/src/Tests/TermValidationTest.php
@@ -63,7 +63,7 @@ public function testValidation() {
     $term->set('parent', 9999);
     $violations = $term->validate();
     $this->assertEqual(count($violations), 1, 'Violation found when term parent is invalid.');
-    $this->assertEqual($violations[0]->getMessage(), format_string('The referenced entity (%type: %id) does not exist.', array('%type' => 'taxonomy_term', '%id' => 9999)));
+    $this->assertEqual($violations[0]->getMessage(), format_string('This entity (%type: %id) cannot be referenced.', array('%type' => 'taxonomy_term', '%id' => 9999)));
 
     $term->set('parent', 0);
     $violations = $term->validate();
diff --git a/core/modules/user/src/Tests/UserValidationTest.php b/core/modules/user/src/Tests/UserValidationTest.php
index f39e11e..f7d2ffa 100644
--- a/core/modules/user/src/Tests/UserValidationTest.php
+++ b/core/modules/user/src/Tests/UserValidationTest.php
@@ -179,7 +179,7 @@ function testValidation() {
     $violations = $user->validate();
     $this->assertEqual(count($violations), 1);
     $this->assertEqual($violations[0]->getPropertyPath(), 'roles.1');
-    $this->assertEqual($violations[0]->getMessage(), t('The referenced entity (%entity_type: %name) does not exist.', array('%entity_type' => 'user_role', '%name' => 'unknown_role')));
+    $this->assertEqual($violations[0]->getMessage(), t('This entity (%entity_type: %name) cannot be referenced.', array('%entity_type' => 'user_role', '%name' => 'unknown_role')));
   }
 
   /**