diff -u b/src/Tests/MonitoringUITest.php b/src/Tests/MonitoringUITest.php
--- b/src/Tests/MonitoringUITest.php
+++ b/src/Tests/MonitoringUITest.php
@@ -96,6 +96,7 @@
       'type' => 'article',
     ));
     $this->drupalGet('admin/config/system/monitoring/sensors/add');
+
     $this->assertFieldByName('status', TRUE);
 
     // Test creation of Node entity aggregator sensor.
@@ -1063,14 +1064,19 @@
 
   /**
    * Add verbose fields to the sensor creation form.
+   *
+   * @param array $fields
+   *   Fields of an entity type to be added to the form.
+   * @param array $edit
+   *   Field data in an associative array.
    */
-  public function addFields($fields = array(), $array = array()) {
+  public function addFields($fields = array(), $edit = array()) {
     $i = 2;
     foreach ($fields as $field) {
       $this->drupalPostForm(NULL, array(), t('Add another field'));
       $array['settings[verbose_fields][' . $i++ . ']'] = $field->getName();
     }
-    $this->drupalPostForm(NULL, $array, t('Save'));
+    $this->drupalPostForm(NULL, $edit, t('Save'));
   }
 
 }