diff -u b/core/modules/link/src/Tests/LinkFieldTest.php b/core/modules/link/src/Tests/LinkFieldTest.php
--- b/core/modules/link/src/Tests/LinkFieldTest.php
+++ b/core/modules/link/src/Tests/LinkFieldTest.php
@@ -625,8 +625,7 @@
 
     // Display creation form.
     $this->drupalGet('entity_test/add');
-    $edit = [];
-    $this->drupalPostForm(NULL, $edit, t('Save'));
+    $this->drupalPostForm(NULL, array(), t('Save'));
 
     $result = $this->xpath('//label[contains(@class, :class) and contains(text(), :text)]', array(':class' => 'form-required', ':text' => 'Link text'));
     $this->assertEqual(count($result), 1, "Link text is marked as required when the link field is set to required.");