diff -u b/config/optional/monitoring.sensor_config.core_cron_safe_threshold.yml b/config/optional/monitoring.sensor_config.core_cron_safe_threshold.yml
--- b/config/optional/monitoring.sensor_config.core_cron_safe_threshold.yml
+++ b/config/optional/monitoring.sensor_config.core_cron_safe_threshold.yml
@@ -14 +14 @@
-    -
+    - automated_cron
diff -u b/src/Tests/MonitoringUITest.php b/src/Tests/MonitoringUITest.php
--- b/src/Tests/MonitoringUITest.php
+++ b/src/Tests/MonitoringUITest.php
@@ -16,7 +16,7 @@
  */
 class MonitoringUITest extends MonitoringTestBase {
 
-  public static $modules = array('dblog', 'node', 'views', 'file');
+  public static $modules = array('dblog', 'node', 'views', 'file', 'automated_cron');
 
   /**
    * {@inheritdoc}
@@ -25,6 +25,9 @@
     parent::setUp();
     // Create the content type page in the setup as it is used by several tests.
     $this->drupalCreateContentType(array('type' => 'page'));
+
+    // Enable the core_cron_safe_threshold sensor.
+    monitoring_sensor_manager()->enableSensor('core_cron_safe_threshold');
   }
 
   /**
@@ -266,9 +269,6 @@
     $this->drupalGet('admin/config/system/monitoring/sensors/ui_test_sensor_config');
     $this->assertOptionSelected('edit-value-type', 'bool');
 
-    // Enable the core_cron_safe_threshold sensor.
-    $this->installModules(array('automated_cron'));
-    monitoring_sensor_manager()->enableSensor('core_cron_safe_threshold');
     // Try to enable a sensor which is disabled by default and vice versa.
     // Check the default status of cron safe threshold and new users sensors.
     $sensor_cron = SensorConfig::load('core_cron_safe_threshold');