diff --git a/modules/monitoring_icinga/lib/Drupal/monitoring_icinga/Pages/IcingaInfo.php b/modules/monitoring_icinga/lib/Drupal/monitoring_icinga/Pages/IcingaInfo.php
index b12cb94..2d176a7 100644
--- a/modules/monitoring_icinga/lib/Drupal/monitoring_icinga/Pages/IcingaInfo.php
+++ b/modules/monitoring_icinga/lib/Drupal/monitoring_icinga/Pages/IcingaInfo.php
@@ -2,7 +2,7 @@
 
 namespace Drupal\monitoring_icinga\Pages;
 
-use Drupal\monitoring\Entity\SensorConfig;
+use Drupal\monitoring\Entity\SensorConfigInterface;
 
 class IcingaInfo {
 
@@ -165,7 +165,7 @@ active check of the sensor.'),
 
     $services_def = array();
     $servicegroups = array();
-    /** @var SensorConfig $sensor_config */
+    /** @var SensorConfigInterface $sensor_config */
     foreach (monitoring_sensor_manager()->getAllSensorConfig() as $sensor_name => $sensor_config) {
 
       if (!$sensor_config->isEnabled()) {
diff --git a/modules/monitoring_munin/monitoring_munin.install b/modules/monitoring_munin/monitoring_munin.install
index f4c0722..03fcd40 100644
--- a/modules/monitoring_munin/monitoring_munin.install
+++ b/modules/monitoring_munin/monitoring_munin.install
@@ -5,6 +5,7 @@
  */
 
 use Drupal\monitoring\Sensor\NonExistingSensorException;
+use Drupal\monitoring\Entity\SensorConfigInterface;
 
 /**
  * Implements hook_install()
@@ -26,7 +27,7 @@ function monitoring_munin_install() {
       if (isset($multigraph_info['categories'])) {
         foreach ($multigraph_info['categories'] as $category) {
           if (isset($sensor_config_by_categories[$category])) {
-            /** @var SensorConfig $sensor_config */
+            /** @var SensorConfigInterface $sensor_config */
             foreach ($sensor_config_by_categories[$category] as $sensor_config) {
               if ($sensor_config->isNumeric()) {
                 $settings = monitoring_sensor_settings_get($sensor_config->getName());
diff --git a/src/Controller/SensorList.php b/src/Controller/SensorList.php
index fb4a2a0..2230601 100644
--- a/src/Controller/SensorList.php
+++ b/src/Controller/SensorList.php
@@ -4,7 +4,7 @@ namespace Drupal\monitoring\Controller;
 
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Controller\ControllerBase;
-use Drupal\monitoring\Entity\SensorConfig;
+use Drupal\monitoring\Entity\SensorConfigInterface;
 use Drupal\monitoring\Result\SensorResultInterface;
 use Drupal\monitoring\Sensor\SensorManager;
 use Drupal\monitoring\SensorRunner;
@@ -80,7 +80,7 @@ class SensorList extends ControllerBase {
       );
       $ok_row_count = 0;
 
-      /** @var SensorConfig $sensor_config */
+      /** @var SensorConfigInterface $sensor_config */
       foreach ($category_sensor_config as $sensor_name => $sensor_config) {
         if (!isset($results[$sensor_name])) {
           continue;
diff --git a/src/Entity/SensorConfig.php b/src/Entity/SensorConfig.php
index 85591f7..d538500 100644
--- a/src/Entity/SensorConfig.php
+++ b/src/Entity/SensorConfig.php
@@ -6,43 +6,11 @@
 
 namespace Drupal\monitoring\Entity;
 
-use Drupal\Core\Config\Entity\ConfigEntityBase;
 use Drupal\Core\Config\Entity\ConfigEntityInterface;
+use Drupal\Core\Config\Entity\ConfigEntityBase;
 use Drupal\Core\Entity\EntityStorageInterface;
 
-/**
- * Represents a sensor config entity class.
- *
- * @todo more
- *
- * @ConfigEntityType(
- *   id = "monitoring_sensor_config",
- *   label = @Translation("Monitoring Sensor"),
- *   handlers = {
- *     "access" = "Drupal\monitoring\SensorConfigAccessControlHandler",
- *     "list_builder" = "Drupal\monitoring\SensorListBuilder",
- *     "form" = {
- *       "add" = "Drupal\monitoring\Form\SensorForm",
- *       "delete" = "Drupal\monitoring\Form\SensorDeleteForm",
- *       "edit" = "Drupal\monitoring\Form\SensorForm",
- *       "details" = "Drupal\monitoring\Form\SensorDetailForm"
- *     }
- *   },
- *   admin_permission = "administer monitoring",
- *   config_prefix = "sensor_config",
- *   entity_keys = {
- *     "id" = "id",
- *     "label" = "label"
- *   },
- *   links = {
- *     "delete-form" = "monitoring.sensor_delete",
- *     "edit-form" = "monitoring.sensor_edit",
- *     "details-form" = "monitoring.detail_form",
- *     "force-run-form" = "monitoring.force_run_sensor"
- *   }
- * )
- */
-class SensorConfig extends ConfigEntityBase {
+class SensorConfig extends ConfigEntityBase implements SensorConfigInterface {
 
   /**
    * The config id.
@@ -122,44 +90,27 @@ class SensorConfig extends ConfigEntityBase {
   public $status = TRUE;
 
   /**
-   * Gets Sensor ID.
-   *
-   * @return string
-   *   Sensor ID.
+   * {@inheritdoc}
    */
   public function getName() {
     return $this->id;
   }
 
   /**
-   * Gets sensor label.
-   *
-   * The sensor label might not be self-explaining enough or unique without
-   * the category, the category should always be present when the label is
-   * displayed.
-   *
-   * @return string
-   *   Sensor label.
+   * {@inheritdoc}
    */
   public function getLabel() {
     return $this->label;
   }
-
   /**
-   * Gets sensor description.
-   *
-   * @return string
-   *   Sensor description.
+   * {@inheritdoc}
    */
   public function getDescription() {
     return $this->description;
   }
 
   /**
-   * Gets sensor plugin class.
-   *
-   * @return string
-   *   SensorPlugin class
+   * {@inheritdoc}
    */
   public function getSensorClass() {
     $definition = monitoring_sensor_manager()->getDefinition($this->plugin_id);
@@ -167,10 +118,7 @@ class SensorConfig extends ConfigEntityBase {
   }
 
   /**
-   * Gets the sensor plugin.
-   *
-   * @return \Drupal\monitoring\SensorPlugin\SensorPluginInterface
-   *   Instantiated sensor.
+   * {@inheritdoc}
    */
   public function getPlugin() {
     $configuration = array('sensor_info' => $this);
@@ -179,27 +127,14 @@ class SensorConfig extends ConfigEntityBase {
   }
 
   /**
-   * Gets sensor categories.
-   *
-   * @return string
-   *   Categories.
+   * {@inheritdoc}
    */
   public function getCategory() {
     return $this->category;
   }
 
   /**
-   * Gets sensor value label.
-   *
-   * In case the sensor defined a value_label, it will use it as label.
-   *
-   * Next if the sensor defines a value_type, it will use the label provided for
-   * that type by monitoring_value_types().
-   *
-   * If nothing is defined, it returns NULL.
-   *
-   * @return string|null
-   *   Sensor value label.
+   * {@inheritdoc}
    */
   public function getValueLabel() {
     if ($this->value_label) {
@@ -215,22 +150,14 @@ class SensorConfig extends ConfigEntityBase {
   }
 
   /**
-   * Gets sensor value type.
-   *
-   * @return string|null
-   *   Sensor value type.
-   *
-   * @see monitoring_value_types().
+   * {@inheritdoc}
    */
   public function getValueType() {
     return $this->value_type;
   }
 
   /**
-   * Determines if the sensor value is numeric.
-   *
-   * @return bool
-   *   TRUE if the sensor value is numeric.
+   * {@inheritdoc}
    */
   public function isNumeric() {
     $value_types = monitoring_value_types();
@@ -241,32 +168,21 @@ class SensorConfig extends ConfigEntityBase {
   }
 
   /**
-   * Determines if the sensor value type is boolean.
-   *
-   * @return bool
-   *   TRUE if the sensor value type is boolean.
+   * {@inheritdoc}
    */
   public function isBool() {
     return $this->getValueType() == 'bool';
   }
 
   /**
-   * Gets sensor caching time.
-   *
-   * @return int
-   *   Caching time in seconds.
+   * {@inheritdoc}
    */
   public function getCachingTime() {
     return $this->caching_time;
   }
 
   /**
-   * Gets configured threshold type.
-   *
-   * Defaults to none.
-   *
-   * @return string|null
-   *   Threshold type.
+   * {@inheritdoc}
    */
   public function getThresholdsType() {
     if (!empty($this->settings['thresholds']['type'])) {
@@ -277,13 +193,7 @@ class SensorConfig extends ConfigEntityBase {
   }
 
   /**
-   * Gets the configured threshold value.
-   *
-   * @param string $key
-   *   Name of the threshold, for example warning or critical.
-   *
-   * @return int|null
-   *   The threshold value or NULL if not configured.
+   * {@inheritdoc}
    */
   public function getThresholdValue($key) {
     if (isset($this->settings['thresholds'][$key]) && $this->settings['thresholds'][$key] !== '') {
@@ -292,73 +202,49 @@ class SensorConfig extends ConfigEntityBase {
   }
 
   /**
-   * Gets all settings.
-   *
-   * @return array
-   *   Settings as an array.
+   * {@inheritdoc}
    */
   public function getSettings() {
     return $this->settings;
   }
 
   /**
-   * Gets the time interval value.
-   *
-   * @return int
-   *   Number of seconds of the time interval.
-   *   NULL in case the sensor does not define the time interval.
+   * {@inheritdoc}
    */
   public function getTimeIntervalValue() {
     return $this->getSetting('time_interval_value', NULL);
   }
 
   /**
-   * Gets the setting of a key.
-   *
-   * @param string $key
-   *   Setting key.
-   * @param mixed $default
-   *   Default value if the setting does not exist.
-   *
-   * @return mixed
-   *   Setting value.
+   * {@inheritdoc}
    */
   public function getSetting($key, $default = NULL) {
     return isset($this->settings[$key]) ? $this->settings[$key] : $default;
   }
 
   /**
-   * Checks if sensor is enabled.
-   *
-   * @return bool
+   * {@inheritdoc}
    */
   public function isEnabled() {
     return (boolean) $this->status;
   }
 
   /**
-   * Checks if sensor provides extended info.
-   *
-   * @return bool
+   * {@inheritdoc}
    */
   public function isExtendedInfo() {
     return in_array('Drupal\monitoring\SensorPlugin\ExtendedInfoSensorPluginInterface', class_implements($this->getSensorClass()));
   }
 
   /**
-   * Checks if sensor defines thresholds.
-   *
-   * @return bool
+   * {@inheritdoc}
    */
   public function isDefiningThresholds() {
     return in_array('Drupal\monitoring\SensorPlugin\ThresholdsSensorPluginInterface', class_implements($this->getSensorClass()));
   }
 
   /**
-   * Compiles sensor values to an associative array.
-   *
-   * @return array
-   *   Sensor config associative array.
+   * {@inheritdoc}
    */
   public function getDefinition() {
     $config = array(
diff --git a/src/Entity/SensorConfigInterface.php b/src/Entity/SensorConfigInterface.php
index 10a19a8..c872ca8 100644
--- a/src/Entity/SensorConfigInterface.php
+++ b/src/Entity/SensorConfigInterface.php
@@ -10,7 +10,6 @@
   use Drupal\Core\Config\Entity\ConfigEntityInterface;
   use Drupal\Core\Entity\EntityStorageInterface;
 
-
   /**
    * Represents a sensor config entity class.
    *
@@ -43,200 +42,201 @@
    *   }
    * )
    */
-  interface SensorConfigInterface {
-    /**
-     * Gets Sensor ID.
-     *
-     * @return string
-     *   Sensor ID.
-     */
-    public function getName();
-
-    /**
-     * Gets sensor label.
-     *
-     * The sensor label might not be self-explaining enough or unique without
-     * the category, the category should always be present when the label is
-     * displayed.
-     *
-     * @return string
-     *   Sensor label.
-     */
-    public function getLabel();
-
-    /**
-     * Gets sensor description.
-     *
-     * @return string
-     *   Sensor description.
-     */
-    public function getDescription();
-
-    /**
-     * Gets sensor plugin class.
-     *
-     * @return string
-     *   SensorPlugin class
-     */
-    public function getSensorClass();
-
-    /**
-     * Gets the sensor plugin.
-     *
-     * @return \Drupal\monitoring\SensorPlugin\SensorPluginInterface
-     *   Instantiated sensor.
-     */
-    public function getPlugin();
-
-    /**
-     * Gets sensor categories.
-     *
-     * @return string
-     *   Categories.
-     */
-    public function getCategory();
-
-    /**
-     * Gets sensor value label.
-     *
-     * In case the sensor defined a value_label, it will use it as label.
-     *
-     * Next if the sensor defines a value_type, it will use the label provided for
-     * that type by monitoring_value_types().
-     *
-     * If nothing is defined, it returns NULL.
-     *
-     * @return string|null
-     *   Sensor value label.
-     */
-    public function getValueLabel();
-
-    /**
-     * Gets sensor value type.
-     *
-     * @return string|null
-     *   Sensor value type.
-     *
-     * @see monitoring_value_types().
-     */
-    public function getValueType();
-
-    /**
-     * Determines if the sensor value is numeric.
-     *
-     * @return bool
-     *   TRUE if the sensor value is numeric.
-     */
-    public function isNumeric();
-
-    /**
-     * Determines if the sensor value type is boolean.
-     *
-     * @return bool
-     *   TRUE if the sensor value type is boolean.
-     */
-    public function isBool();
-
-    /**
-     * Gets sensor caching time.
-     *
-     * @return int
-     *   Caching time in seconds.
-     */
-    public function getCachingTime();
-
-    /**
-     * Gets configured threshold type.
-     *
-     * Defaults to none.
-     *
-     * @return string|null
-     *   Threshold type.
-     */
-    public function getThresholdsType();
-
-    /**
-     * Gets the configured threshold value.
-     *
-     * @param string $key
-     *   Name of the threshold, for example warning or critical.
-     *
-     * @return int|null
-     *   The threshold value or NULL if not configured.
-     */
-    public function getThresholdValue($key);
-
-    /**
-     * Gets all settings.
-     *
-     * @return array
-     *   Settings as an array.
-     */
-    public function getSettings();
-
-    /**
-     * Gets the time interval value.
-     *
-     * @return int
-     *   Number of seconds of the time interval.
-     *   NULL in case the sensor does not define the time interval.
-     */
-    public function getTimeIntervalValue();
-
-    /**
-     * Gets the setting of a key.
-     *
-     * @param string $key
-     *   Setting key.
-     * @param mixed $default
-     *   Default value if the setting does not exist.
-     *
-     * @return mixed
-     *   Setting value.
-     */
-    public function getSetting($key, $default = NULL);
-
-    /**
-     * Checks if sensor is enabled.
-     *
-     * @return bool
-     */
-    public function isEnabled();
-
-    /**
-     * Checks if sensor provides extended info.
-     *
-     * @return bool
-     */
-    public function isExtendedInfo();
-
-    /**
-     * Checks if sensor defines thresholds.
-     *
-     * @return bool
-     */
-    public function isDefiningThresholds();
-
-    /**
-     * Compiles sensor values to an associative array.
-     *
-     * @return array
-     *   Sensor config associative array.
-     */
-    public function getDefinition();
-
-    /**
-     * {@inheritdoc}
-     */
-    public static function sort(ConfigEntityInterface $a, ConfigEntityInterface $b);
-
-    /**
-     * {@inheritdoc}
-     */
-    public function calculateDependencies();
-
-    /**
-     * {@inheritdoc}
-     */
-    public function postSave(EntityStorageInterface $storage, $update = TRUE);
-  }
+
+interface SensorConfigInterface extends ConfigEntityInterface {
+  /**
+   * Gets Sensor ID.
+   *
+   * @return string
+   *   Sensor ID.
+   */
+  public function getName();
+
+  /**
+   * Gets sensor label.
+   *
+   * The sensor label might not be self-explaining enough or unique without
+   * the category, the category should always be present when the label is
+   * displayed.
+   *
+   * @return string
+   *   Sensor label.
+   */
+  public function getLabel();
+
+  /**
+   * Gets sensor description.
+   *
+   * @return string
+   *   Sensor description.
+   */
+  public function getDescription();
+
+  /**
+   * Gets sensor plugin class.
+   *
+   * @return string
+   *   SensorPlugin class
+   */
+  public function getSensorClass();
+
+  /**
+   * Gets the sensor plugin.
+   *
+   * @return \Drupal\monitoring\SensorPlugin\SensorPluginInterface
+   *   Instantiated sensor.
+   */
+  public function getPlugin();
+
+  /**
+   * Gets sensor categories.
+   *
+   * @return string
+   *   Categories.
+   */
+  public function getCategory();
+
+  /**
+   * Gets sensor value label.
+   *
+   * In case the sensor defined a value_label, it will use it as label.
+   *
+   * Next if the sensor defines a value_type, it will use the label provided for
+   * that type by monitoring_value_types().
+   *
+   * If nothing is defined, it returns NULL.
+   *
+   * @return string|null
+   *   Sensor value label.
+   */
+  public function getValueLabel();
+
+  /**
+   * Gets sensor value type.
+   *
+   * @return string|null
+   *   Sensor value type.
+   *
+   * @see monitoring_value_types().
+   */
+  public function getValueType();
+
+  /**
+   * Determines if the sensor value is numeric.
+   *
+   * @return bool
+   *   TRUE if the sensor value is numeric.
+   */
+  public function isNumeric();
+
+  /**
+   * Determines if the sensor value type is boolean.
+   *
+   * @return bool
+   *   TRUE if the sensor value type is boolean.
+   */
+  public function isBool();
+
+  /**
+   * Gets sensor caching time.
+   *
+   * @return int
+   *   Caching time in seconds.
+   */
+  public function getCachingTime();
+
+  /**
+   * Gets configured threshold type.
+   *
+   * Defaults to none.
+   *
+   * @return string|null
+   *   Threshold type.
+   */
+  public function getThresholdsType();
+
+  /**
+   * Gets the configured threshold value.
+   *
+   * @param string $key
+   *   Name of the threshold, for example warning or critical.
+   *
+   * @return int|null
+   *   The threshold value or NULL if not configured.
+   */
+  public function getThresholdValue($key);
+
+  /**
+   * Gets all settings.
+   *
+   * @return array
+   *   Settings as an array.
+   */
+  public function getSettings();
+
+  /**
+   * Gets the time interval value.
+   *
+   * @return int
+   *   Number of seconds of the time interval.
+   *   NULL in case the sensor does not define the time interval.
+   */
+  public function getTimeIntervalValue();
+
+  /**
+   * Gets the setting of a key.
+   *
+   * @param string $key
+   *   Setting key.
+   * @param mixed $default
+   *   Default value if the setting does not exist.
+   *
+   * @return mixed
+   *   Setting value.
+   */
+  public function getSetting($key, $default = NULL);
+
+  /**
+   * Checks if sensor is enabled.
+   *
+   * @return bool
+   */
+  public function isEnabled();
+
+  /**
+   * Checks if sensor provides extended info.
+   *
+   * @return bool
+   */
+  public function isExtendedInfo();
+
+  /**
+   * Checks if sensor defines thresholds.
+   *
+   * @return bool
+   */
+  public function isDefiningThresholds();
+
+  /**
+   * Compiles sensor values to an associative array.
+   *
+   * @return array
+   *   Sensor config associative array.
+   */
+  public function getDefinition();
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function sort(ConfigEntityInterface $a, ConfigEntityInterface $b);
+
+  /**
+   * {@inheritdoc}
+   */
+  public function calculateDependencies();
+
+  /**
+   * {@inheritdoc}
+   */
+  public function postSave(EntityStorageInterface $storage, $update = TRUE);
+}
diff --git a/src/Form/SensorDetailForm.php b/src/Form/SensorDetailForm.php
index af6d8ef..5cafe84 100644
--- a/src/Form/SensorDetailForm.php
+++ b/src/Form/SensorDetailForm.php
@@ -8,7 +8,7 @@ namespace Drupal\monitoring\Form;
 
 use Drupal\Component\Utility\SafeMarkup;
 use Drupal\Core\Entity\EntityForm;
-use Drupal\monitoring\Entity\SensorConfig;
+use Drupal\monitoring\Entity\SensorConfigInterface;
 use Drupal\monitoring\Sensor\DisabledSensorException;
 use Drupal\monitoring\Sensor\NonExistingSensorException;
 use Drupal\monitoring\Sensor\SensorManager;
@@ -65,7 +65,7 @@ class SensorDetailForm extends EntityForm {
    */
   public function form(array $form, FormStateInterface $form_state) {
     $form = parent::form($form, $form_state);
-    /** @var SensorConfig $sensor_config */
+    /** @var SensorConfigInterface $sensor_config */
     $sensor_config = $this->entity;
     try {
       $results = $this->sensorRunner->runSensors(array($sensor_config), FALSE, TRUE);
@@ -224,7 +224,7 @@ class SensorDetailForm extends EntityForm {
    *
    * @return string
    */
-  public function formTitle(SensorConfig $monitoring_sensor_config) {
+  public function formTitle(SensorConfigInterface $monitoring_sensor_config) {
     return $this->t('@label (@category)', array('@category' => $monitoring_sensor_config->getCategory(), '@label' => $monitoring_sensor_config->getLabel()));
   }
 }
diff --git a/src/Form/SensorForm.php b/src/Form/SensorForm.php
index b04d649..20b4e6c 100644
--- a/src/Form/SensorForm.php
+++ b/src/Form/SensorForm.php
@@ -9,7 +9,7 @@ namespace Drupal\monitoring\Form;
 use Drupal\Core\Entity\EntityForm;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Url;
-use Drupal\monitoring\Entity\SensorConfig;
+use Drupal\monitoring\Entity\SensorConfigInterface;
 use Drupal\monitoring\SensorPlugin\SensorPluginBase;
 use Drupal\monitoring\SensorPlugin\SensorPluginInterface;
 
@@ -25,7 +25,7 @@ class SensorForm extends EntityForm {
     $form = parent::form($form, $form_state);
     $form['#tree'] = TRUE;
 
-    /** @var SensorConfig $sensor_config */
+    /** @var SensorConfigInterface $sensor_config */
     $sensor_config = $this->entity;
 
     $form['category'] = array(
@@ -198,7 +198,7 @@ class SensorForm extends EntityForm {
   public function validate(array $form, FormStateInterface $form_state) {
     parent::validate($form, $form_state);
 
-    /* @var SensorConfig $sensor_config */
+    /** @var SensorPluginInterface $plugin */
     $sensor_config = $this->entity;
     /** @var SensorPluginInterface $plugin */
     if ($sensor_config->isNew()) {
@@ -218,7 +218,7 @@ class SensorForm extends EntityForm {
   public function submitForm(array &$form, FormStateInterface $form_state) {
     parent::submitForm($form, $form_state);
 
-    /** @var SensorConfig $sensor_config */
+    /** @var SensorConfigInterface $sensor_config */
     $sensor_config = $this->entity;
     $plugin = $sensor_config->getPlugin();
 
diff --git a/src/SensorPlugin/DatabaseAggregatorSensorPluginBase.php b/src/SensorPlugin/DatabaseAggregatorSensorPluginBase.php
index e10c7d7..37dc48d 100644
--- a/src/SensorPlugin/DatabaseAggregatorSensorPluginBase.php
+++ b/src/SensorPlugin/DatabaseAggregatorSensorPluginBase.php
@@ -101,7 +101,7 @@ abstract class DatabaseAggregatorSensorPluginBase extends ThresholdsSensorPlugin
 
     /** @var SensorForm $sensor_form */
     $sensor_form = $form_state->getFormObject();
-    /** @var SensorConfig $sensor_config */
+    /** @var SensorConfigInterface $sensor_config */
     $sensor_config = $sensor_form->getEntity();
 
     // Copy time interval field & value into settings if the field is specified.
diff --git a/src/Tests/MonitoringApiTest.php b/src/Tests/MonitoringApiTest.php
index 496ce21..657a8b4 100644
--- a/src/Tests/MonitoringApiTest.php
+++ b/src/Tests/MonitoringApiTest.php
@@ -6,6 +6,7 @@
 
 namespace Drupal\monitoring\Tests;
 
+use Drupal\monitoring\Entity\SensorConfigInterface;
 use Drupal\monitoring\Result\SensorResultInterface;
 use Drupal\monitoring\Sensor\DisabledSensorException;
 use Drupal\monitoring\Sensor\NonExistingSensorException;
diff --git a/src/Tests/MonitoringCoreTest.php b/src/Tests/MonitoringCoreTest.php
index ec728e5..758bfd6 100644
--- a/src/Tests/MonitoringCoreTest.php
+++ b/src/Tests/MonitoringCoreTest.php
@@ -11,6 +11,7 @@ use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Logger\RfcLogLevel;
 use Drupal\file\FileUsage\FileUsageInterface;
 use Drupal\monitoring\Entity\SensorConfig;
+use Drupal\monitoring\Entity\SensorConfigInterface;
 
 
 /**