diff --git a/src/Checker/OrderRefundingAvailabilityChecker.php b/src/Checker/OrderRefundingAvailabilityChecker.php
index ee99d9ad..05180328 100644
--- a/src/Checker/OrderRefundingAvailabilityChecker.php
+++ b/src/Checker/OrderRefundingAvailabilityChecker.php
@@ -25,9 +25,12 @@ public function __invoke(string $orderNumber): bool
         $order = $this->orderRepository->findOneByNumber($orderNumber);
         Assert::notNull($order);
 
-        return in_array($order->getPaymentState(), [
+        return
+            in_array($order->getPaymentState(), [
                 OrderPaymentStates::STATE_PAID,
                 OrderPaymentStates::STATE_PARTIALLY_REFUNDED,
-                ]) && $order->getTotal() !== 0;
+            ], true) &&
+            $order->getTotal() !== 0
+        ;
     }
 }
diff --git a/src/Checker/OrderRefundsListAvailabilityChecker.php b/src/Checker/OrderRefundsListAvailabilityChecker.php
index f10c0ae3..d6401385 100644
--- a/src/Checker/OrderRefundsListAvailabilityChecker.php
+++ b/src/Checker/OrderRefundsListAvailabilityChecker.php
@@ -25,10 +25,13 @@ public function __invoke(string $orderNumber): bool
         $order = $this->orderRepository->findOneByNumber($orderNumber);
         Assert::notNull($order);
 
-        return in_array($order->getPaymentState(), [
+        return
+            in_array($order->getPaymentState(), [
                 OrderPaymentStates::STATE_PAID,
                 OrderPaymentStates::STATE_PARTIALLY_REFUNDED,
                 OrderPaymentStates::STATE_REFUNDED,
-                ]) && $order->getTotal() !== 0;
+            ], true) &&
+            $order->getTotal() !== 0
+        ;
     }
 }