diff --git a/core/modules/user/src/Tests/UserRegistrationTest.php b/core/modules/user/src/Tests/UserRegistrationTest.php
index ff3fa30..9a4f4d4 100644
--- a/core/modules/user/src/Tests/UserRegistrationTest.php
+++ b/core/modules/user/src/Tests/UserRegistrationTest.php
@@ -150,6 +150,31 @@ function testRegistrationEmailDuplicates() {
     $this->assertText(t('The email address @email is already taken.', array('@email' => $duplicate_user->getEmail())), 'Supplying a duplicate email address with added whitespace displays an error message');
   }
 
+  /**
+   * Tests that UUID isn't cached in form state on register form.
+   */
+  public function testUUIDFormState() {
+    // Don't require email verification and allow registration by site visitors
+    // without administrator approval.
+    $this->config('user.settings')
+      ->set('verify_mail', FALSE)
+      ->set('register', USER_REGISTER_VISITORS)
+      ->save();
+
+    $edit = array();
+    $edit['name'] = $this->randomMachineName();
+    $edit['mail'] = $edit['name'] . '@example.com';
+
+    // Create one account.
+    $this->drupalPostForm('user/register', $edit, t('Create new account'));
+    $this->assertResponse(200);
+    // Create a second account.
+    $edit['name'] = $this->randomMachineName();
+    $edit['mail'] = $edit['name'] . '@example.com';
+    $this->drupalPostForm('user/register', $edit, t('Create new account'));
+    $this->assertResponse(200);
+  }
+
   function testRegistrationDefaultValues() {
     // Don't require email verification and allow registration by site visitors
     // without administrator approval.