diff --git a/modules/node/node.test b/modules/node/node.test
index 9ef4c25..34ffb05 100644
--- a/modules/node/node.test
+++ b/modules/node/node.test
@@ -2644,5 +2644,9 @@ class NodeEntityViewModeAlterTest extends NodeWebTestCase {
     $this->assertText('Extra data that should appear only in the teaser for the node.', 'Teaser text present');
     // Make sure body text is not present.
     $this->assertNoText('Data that should appear only in the body for the node.', 'Body text not present');
+
+    // Test that the correct build mode has been set.
+    $build = node_view($node);
+    $this->assertEqual($build['#view_mode'], 'teaser', 'The view mode has correctly been set to teaser.');
   }
 }