diff -u b/src/Tests/MonitoringUITest.php b/src/Tests/MonitoringUITest.php
--- b/src/Tests/MonitoringUITest.php
+++ b/src/Tests/MonitoringUITest.php
@@ -121,9 +121,15 @@
       'conditions[1][value]' => 0,
     );
 
-    // Get every available field for the entity type node.
-    $node_fields = \Drupal::entityManager()->getBaseFieldDefinitions('node');
+    // Available fields for the entity type node.
+    $node_fields = ['nid', 'title', 'langcode', 'sticky', 'status', 'uuid', 'created', 'changed', 'uid'];
+
+    // Add more inputs to the form.
+    $this->postFormMultiple(t('Add another field'), count($node_fields));
+
+    // Add verbose fields based on node fields.
     $edit = $this->addAllVerboseFields($node_fields, $edit);
+
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     $this->assertText(SafeMarkup::format('Sensor @label saved.', array('@label' => 'Node Entity Aggregator sensor')));
@@ -155,7 +161,7 @@
     $this->assertFieldByName('conditions[1][value]', '0');
     $i = 2;
     foreach ($node_fields as $field) {
-      $this->assertFieldByName('settings[verbose_fields][' . $i++ . ']', $field->getName());
+      $this->assertFieldByName('settings[verbose_fields][' . $i++ . ']', $field);
     }
 
     // Create a file to test.
@@ -186,11 +192,16 @@
     $this->assertText('Sensor plugin settings');
     $this->drupalPostForm(NULL, array('settings[entity_type]' => 'file'), t('Add another condition'));
 
-    // Get every available field for entity type file.
-    $file_fields = \Drupal::entityManager()->getBaseFieldDefinitions('file');
-
+    // Available fields for entity type file.
+    $file_fields = ['fid', 'uuid', 'filename', 'uri', 'filemime', 'filesize', 'status', 'created'];
     $edit = array();
+
+    // Add more inputs to the form.
+    $this->postFormMultiple(t('Add another field'), count($file_fields));
+
+    // Add verbose fields based on file fields.
     $edit = $this->addAllVerboseFields($file_fields, $edit);
+
     $this->drupalPostForm(NULL, $edit, t('Save'));
 
     $this->assertText(SafeMarkup::format('Sensor @label saved.', array('@label' => 'File Entity Aggregator sensor')));
@@ -216,7 +227,7 @@
     $this->drupalGet('admin/config/system/monitoring/sensors/file_test_sensor');
     $i = 2;
     foreach ($file_fields as $field) {
-      $this->assertFieldByName('settings[verbose_fields][' . $i++ . ']', $field->getName());
+      $this->assertFieldByName('settings[verbose_fields][' . $i++ . ']', $field);
     }
 
     $this->drupalGet('admin/config/system/monitoring/sensors/ui_test_sensor/delete');
@@ -1080,8 +1091,20 @@
     foreach ($fields as $field) {
-      $this->drupalPostForm(NULL, array(), t('Add another field'));
-      $edit['settings[verbose_fields][' . $i++ . ']'] = $field->getName();
+      $edit['settings[verbose_fields][' . $i++ . ']'] = $field;
     }
     return $edit;
   }
 
+  /**
+   * Add inputs of verbose fields to the form based on $times.
+   *
+   * @param string $button
+   *   Name of the button to be used.
+   * @param int $times
+   *   Times while the loop is executing.
+   */
+  public function postFormMultiple($button, $times) {
+    for ($i = 0; $i < $times; ++$i) {
+      $this->drupalPostForm(NULL, array(), $button);
+    }
+  }
 }