diff -u b/core/modules/breakpoint/lib/Drupal/breakpoint/Tests/BreakpointAPITest.php b/core/modules/breakpoint/lib/Drupal/breakpoint/Tests/BreakpointAPITest.php
--- b/core/modules/breakpoint/lib/Drupal/breakpoint/Tests/BreakpointAPITest.php
+++ b/core/modules/breakpoint/lib/Drupal/breakpoint/Tests/BreakpointAPITest.php
@@ -30,19 +30,6 @@
    * Test Breakpoint::buildConfigName().
    */
   public function testConfigName() {
-    $msg = "Expected InvalidBreakpointNameException thrown.";
-    try {
-      entity_create('breakpoint', array(
-        'label' => Unicode::strtolower($this->randomName()),
-        'source' => 'custom_module',
-        'sourceType' => 'oops',
-      ));
-      $this->fail($msg);
-    }
-    catch (InvalidBreakpointNameException $e) {
-      $this->pass($msg);
-    }
-
     // Try an invalid sourceType.
     $label = $this->randomName();
     $breakpoint = entity_create('breakpoint', array(
diff -u b/core/modules/breakpoint/lib/Drupal/breakpoint/Tests/BreakpointGroupAPITest.php b/core/modules/breakpoint/lib/Drupal/breakpoint/Tests/BreakpointGroupAPITest.php
--- b/core/modules/breakpoint/lib/Drupal/breakpoint/Tests/BreakpointGroupAPITest.php
+++ b/core/modules/breakpoint/lib/Drupal/breakpoint/Tests/BreakpointGroupAPITest.php
@@ -31,20 +31,6 @@
    * Test Breakpoint::buildConfigName().
    */
   public function testConfigName() {
-    $msg = "Expected InvalidBreakpointNameException thrown.";
-    try {
-      $label = $this->randomName();
-      entity_create('breakpoint_group', array(
-        'label' => $label,
-        'source' => 'custom_module',
-        'sourceType' => 'oops',
-      ));
-      $this->fail($msg);
-    }
-    catch (InvalidBreakpointNameException $e) {
-      $this->pass($msg);
-    }
-
     // Try an invalid sourceType.
     $label = $this->randomName();
     $breakpoint_group = entity_create('breakpoint_group', array(
only in patch2:
unchanged:
--- a/core/modules/breakpoint/tests/Drupal/breakpoint/Tests/BreakpointConfigEntityUnitTest.php
+++ b/core/modules/breakpoint/tests/Drupal/breakpoint/Tests/BreakpointConfigEntityUnitTest.php
@@ -96,6 +96,7 @@ public function setUp() {
    */
   public function testCalculateDependenciesModule() {
     $values = array(
+      'name' => 'test',
       'source' => 'test_module',
       'sourceType' => Breakpoint::SOURCE_TYPE_MODULE,
     );
@@ -111,6 +112,7 @@ public function testCalculateDependenciesModule() {
    */
   public function testCalculateDependenciesTheme() {
     $values = array(
+      'name' => 'test',
       'source' => 'test_theme',
       'sourceType' => Breakpoint::SOURCE_TYPE_THEME,
     );
@@ -121,4 +123,15 @@ public function testCalculateDependenciesTheme() {
     $this->assertContains('test_theme', $dependencies['theme']);
   }
 
+  /**
+   * @expectedException \Drupal\breakpoint\InvalidBreakpointNameException
+   */
+  public function testNameException () {
+    new Breakpoint(array(
+      'label' => $this->randomName(),
+      'source' => 'custom_module',
+      'sourceType' => 'oops',
+    ));
+  }
+
 }
only in patch2:
unchanged:
--- a/core/modules/breakpoint/tests/Drupal/breakpoint/Tests/BreakpointGroupConfigEntityUnitTest.php
+++ b/core/modules/breakpoint/tests/Drupal/breakpoint/Tests/BreakpointGroupConfigEntityUnitTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\breakpoint\Tests;
 
 use Drupal\breakpoint\Entity\Breakpoint;
+use Drupal\breakpoint\Entity\BreakpointGroup;
 use Drupal\Core\DependencyInjection\ContainerBuilder;
 use Drupal\Tests\UnitTestCase;
 
@@ -109,6 +110,7 @@ public function setUpEntity($values) {
   public function testCalculateDependenciesModule() {
     $this->setUpEntity(
       array(
+        'name' => 'test',
         'source' => 'test_module',
         'sourceType' => Breakpoint::SOURCE_TYPE_MODULE,
       )
@@ -134,6 +136,7 @@ public function testCalculateDependenciesModule() {
   public function testCalculateDependenciesTheme() {
     $this->setUpEntity(
       array(
+        'name' => 'test',
         'source' => 'test_theme',
         'sourceType' => Breakpoint::SOURCE_TYPE_THEME,
       )
@@ -155,4 +158,15 @@ public function testCalculateDependenciesTheme() {
     $this->assertContains('breakpoint.breakpoint.test', $dependencies['entity']);
   }
 
+  /**
+   * @expectedException \Drupal\breakpoint\InvalidBreakpointNameException
+   */
+  public function testNameException () {
+    new BreakpointGroup(array(
+      'label' => $this->randomName(),
+      'source' => 'custom_module',
+      'sourceType' => 'oops',
+    ));
+  }
+
 }
only in patch2:
unchanged:
--- a/core/modules/responsive_image/tests/Drupal/responsive_image/Tests/ResponsiveImageMappingEntityTest.php
+++ b/core/modules/responsive_image/tests/Drupal/responsive_image/Tests/ResponsiveImageMappingEntityTest.php
@@ -99,7 +99,7 @@ public function setUp() {
     $this->uuid = $this->getMock('\Drupal\Component\Uuid\UuidInterface');
 
     $this->breakpointGroupId = $this->randomName(9);
-    $this->breakpointGroup = $this->getMock('Drupal\breakpoint\Entity\BreakpointGroup', array(), array(array('id' => $this->breakpointGroupId)));
+    $this->breakpointGroup = $this->getMock('Drupal\breakpoint\Entity\BreakpointGroup', array(), array(array('name' => 'test', 'id' => $this->breakpointGroupId)));
 
     $this->breakpointGroupStorage = $this->getMock('\Drupal\Core\Config\Entity\ConfigEntityStorageInterface');
     $this->breakpointGroupStorage