diff --git a/src/Command/CheckCommand.php b/src/Command/CheckCommand.php
index 6e9f76d..ae7b57e 100644
--- a/src/Command/CheckCommand.php
+++ b/src/Command/CheckCommand.php
@@ -10,6 +10,7 @@
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
 use whatwedo\MonitorBundle\Manager\MonitoringManager;
+use whatwedo\MonitorBundle\Monitoring\AttributeInterface;
 use whatwedo\MonitorBundle\Monitoring\Metric\AbstractMetric;
 use whatwedo\MonitorBundle\Monitoring\Sensor\AbstractSensor;
 use whatwedo\MonitorBundle\Util\StatusCodeDecider;
@@ -43,20 +44,28 @@ private function printResult(SymfonyStyle $io, $result, $previousGroup = null, $
             $rows = [];
             $subs = [];
             foreach ($items as $subGroup => $row) {
-                if ($row instanceof AbstractSensor) {
-                    $rows[] = [
-                        sprintf('<fg=%s;options=bold>%s</>', $row->getState()->getCliColor(), $row->getState()->getIcon()),
-                        $row->getName(),
-                        $row->getDetails() ? json_encode($row->getDetails(), JSON_THROW_ON_ERROR | JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) : '',
-                    ];
-                } elseif ($row instanceof AbstractMetric) {
-                    $rows[] = [
-                        sprintf('<fg=%s;options=bold>%s</>', $row->getState()->getCliColor(), $row->getState()->getIcon()),
-                        $row->getName(),
-                        $row->getValue(),
-                    ];
-                } elseif (is_array($row)) {
+                if (is_array($row)) {
                     $subs[$subGroup] = $row;
+
+                    continue;
+                }
+
+                try {
+                    if ($row instanceof AbstractSensor) {
+                        $rows[] = [
+                            sprintf('<fg=%s;options=bold>%s</>', $row->getState()->getCliColor(), $row->getState()->getIcon()),
+                            $row->getName(),
+                            $row->getDetails() ? json_encode($row->getDetails(), JSON_THROW_ON_ERROR | JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) : '',
+                        ];
+                    } elseif ($row instanceof AbstractMetric) {
+                        $rows[] = [
+                            sprintf('<fg=%s;options=bold>%s</>', $row->getState()->getCliColor(), $row->getState()->getIcon()),
+                            $row->getName(),
+                            $row->getValue(),
+                        ];
+                    }
+                } catch (\LogicException) {
+                    continue;
                 }
             }
 
diff --git a/src/Manager/MonitoringManager.php b/src/Manager/MonitoringManager.php
index 7545a5b..ac31ffb 100644
--- a/src/Manager/MonitoringManager.php
+++ b/src/Manager/MonitoringManager.php
@@ -7,7 +7,9 @@
 use whatwedo\MonitorBundle\Enums\MetricStateEnum;
 use whatwedo\MonitorBundle\Enums\SensorStateEnum;
 use whatwedo\MonitorBundle\Monitoring\AttributeInterface;
+use whatwedo\MonitorBundle\Monitoring\Metric\MetricStateInterface;
 use whatwedo\MonitorBundle\Monitoring\Sensor\AbstractSensor;
+use whatwedo\MonitorBundle\Monitoring\Sensor\SensorStateInterface;
 
 class MonitoringManager
 {
@@ -106,15 +108,27 @@ public function getAttribute(string $className): AttributeInterface
 
     private function wasSuccessful(AttributeInterface $attribute): bool
     {
-        return $attribute instanceof AbstractSensor
-            ? $attribute->getState() === SensorStateEnum::SUCCESSFUL
-            : $attribute->getState() === MetricStateEnum::OK;
+        if ($attribute instanceof SensorStateInterface) {
+            return $attribute->getState() === SensorStateEnum::SUCCESSFUL;
+        }
+
+        if ($attribute instanceof MetricStateInterface) {
+            return $attribute->getState() === MetricStateEnum::OK;
+        }
+
+        return false;
     }
 
-    private function wasWarning(AttributeInterface $abstract): bool
+    private function wasWarning(AttributeInterface $attribute): bool
     {
-        return $abstract instanceof AbstractSensor
-            ? $abstract->getState() === SensorStateEnum::WARNING
-            : $abstract->getState() === MetricStateEnum::WARNING;
+        if ($attribute instanceof SensorStateInterface) {
+            return $attribute->getState() === SensorStateEnum::WARNING;
+        }
+
+        if ($attribute instanceof MetricStateInterface) {
+            return $attribute->getState() === MetricStateEnum::WARNING;
+        }
+
+        return false;
     }
 }
diff --git a/src/Monitoring/Metric/AbstractMetric.php b/src/Monitoring/Metric/AbstractMetric.php
index edcfbb4..ffdb522 100644
--- a/src/Monitoring/Metric/AbstractMetric.php
+++ b/src/Monitoring/Metric/AbstractMetric.php
@@ -7,7 +7,7 @@
 use whatwedo\MonitorBundle\Enums\MetricStateEnum;
 use whatwedo\MonitorBundle\Monitoring\AttributeInterface;
 
-abstract class AbstractMetric implements AttributeInterface
+abstract class AbstractMetric implements AttributeInterface, MetricStateInterface
 {
     public null|int|float $value = null;
 
@@ -16,7 +16,7 @@ abstract class AbstractMetric implements AttributeInterface
     public function getState(): MetricStateEnum
     {
         if ($this->state === null) {
-            throw new \RuntimeException(static::class.'::$state is not set.');
+            throw new \LogicException(static::class.'::$state is not set.');
         }
 
         return $this->state;
diff --git a/src/Monitoring/Metric/MetricStateInterface.php b/src/Monitoring/Metric/MetricStateInterface.php
new file mode 100644
index 0000000..d2e3eae
--- /dev/null
+++ b/src/Monitoring/Metric/MetricStateInterface.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace whatwedo\MonitorBundle\Monitoring\Metric;
+
+use whatwedo\MonitorBundle\Enums\MetricStateEnum;
+
+interface MetricStateInterface
+{
+    /** @throws \LogicException */
+    public function getState(): MetricStateEnum;
+}
\ No newline at end of file
diff --git a/src/Monitoring/Sensor/AbstractSensor.php b/src/Monitoring/Sensor/AbstractSensor.php
index e1c8ab8..8097be8 100644
--- a/src/Monitoring/Sensor/AbstractSensor.php
+++ b/src/Monitoring/Sensor/AbstractSensor.php
@@ -7,7 +7,7 @@
 use whatwedo\MonitorBundle\Enums\SensorStateEnum;
 use whatwedo\MonitorBundle\Monitoring\AttributeInterface;
 
-abstract class AbstractSensor implements AttributeInterface
+abstract class AbstractSensor implements AttributeInterface, SensorStateInterface
 {
     public ?SensorStateEnum $state = null;
 
@@ -16,7 +16,7 @@ abstract class AbstractSensor implements AttributeInterface
     public function getState(): SensorStateEnum
     {
         if ($this->state === null) {
-            throw new \RuntimeException(__CLASS__.'::$state is not set.');
+            throw new \LogicException(static::class.'::$state is not set.');
         }
 
         return $this->state;
diff --git a/src/Monitoring/Sensor/SensorStateInterface.php b/src/Monitoring/Sensor/SensorStateInterface.php
new file mode 100644
index 0000000..77fc0b6
--- /dev/null
+++ b/src/Monitoring/Sensor/SensorStateInterface.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace whatwedo\MonitorBundle\Monitoring\Sensor;
+
+use whatwedo\MonitorBundle\Enums\SensorStateEnum;
+
+interface SensorStateInterface
+{
+    /** @throws \LogicException */
+    public function getState(): SensorStateEnum;
+}
diff --git a/src/Normalizer/AttributeNormalizer.php b/src/Normalizer/AttributeNormalizer.php
index 20e2071..e650aec 100644
--- a/src/Normalizer/AttributeNormalizer.php
+++ b/src/Normalizer/AttributeNormalizer.php
@@ -7,7 +7,9 @@
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 use whatwedo\MonitorBundle\Monitoring\AttributeInterface;
 use whatwedo\MonitorBundle\Monitoring\Metric\AbstractMetric;
+use whatwedo\MonitorBundle\Monitoring\Metric\MetricStateInterface;
 use whatwedo\MonitorBundle\Monitoring\Sensor\AbstractSensor;
+use whatwedo\MonitorBundle\Monitoring\Sensor\SensorStateInterface;
 
 class AttributeNormalizer implements NormalizerInterface
 {
@@ -20,13 +22,18 @@ public function normalize($object, string $format = null, array $context = []):
             'name' => $object->getName(),
         ];
 
+        try {
+            if ($object instanceof MetricStateInterface || $object instanceof SensorStateInterface) {
+                $data['state'] = $object->getState();
+            }
+        } catch (\LogicException) {
+        }
+
         if ($object instanceof AbstractSensor) {
-            $data['state'] = $object->getState();
             $data['details'] = $object->getDetails();
         }
 
         if ($object instanceof AbstractMetric) {
-            $data['state'] = $object->getState();
             $data['value'] = $object->getValue();
         }