diff -u b/config/install/monitoring.sensor_config.core_cron_safe_threshold.yml b/config/optional/monitoring.sensor_config.core_cron_safe_threshold.yml
--- b/config/install/monitoring.sensor_config.core_cron_safe_threshold.yml
+++ b/config/optional/monitoring.sensor_config.core_cron_safe_threshold.yml
@@ -11,0 +12,3 @@
+dependencies:
+  module:
+    - automated_cron
\ No newline at end of file
diff -u b/modules/multigraph/src/Tests/MultigraphServicesTest.php b/modules/multigraph/src/Tests/MultigraphServicesTest.php
--- b/modules/multigraph/src/Tests/MultigraphServicesTest.php
+++ b/modules/multigraph/src/Tests/MultigraphServicesTest.php
@@ -118,7 +118,7 @@
    */
   protected function doRequest($action, $query = array()) {
     $query['_format'] = $this->defaultFormat;
-    $url = Url::fromUri('base:/' . $action, array('absolute' => TRUE, 'query' => $query));
+    $url = Url::fromUri('base:' . $action, array('absolute' => TRUE, 'query' => $query));
     $result = $this->httpRequest($url, 'GET', NULL, $this->defaultMimeType);
     return Json::decode($result);
   }
diff -u b/src/Tests/MonitoringServicesTest.php b/src/Tests/MonitoringServicesTest.php
--- b/src/Tests/MonitoringServicesTest.php
+++ b/src/Tests/MonitoringServicesTest.php
@@ -202,7 +202,7 @@
    */
   protected function doRequest($action, $query = array()) {
     $query['_format'] = $this->defaultFormat;
-    $url = Url::fromUri('base:/' . $action, array('absolute' => TRUE, 'query' => $query));
+    $url = Url::fromUri('base:' . $action, array('absolute' => TRUE, 'query' => $query));
     $result = $this->httpRequest($url, 'GET', NULL, $this->defaultMimeType);
     return Json::decode($result);
   }