diff --git a/tests/Behat/Context/Ui/RefundingContext.php b/tests/Behat/Context/Ui/RefundingContext.php
index 8206c74c..35db4d69 100644
--- a/tests/Behat/Context/Ui/RefundingContext.php
+++ b/tests/Behat/Context/Ui/RefundingContext.php
@@ -113,7 +113,7 @@ public function decideToRefundPartFromProductWithPayment(
         $this->orderRefundsPage->pickPartOfUnitWithProductToRefund(
             $productName,
             $unitNumber-1,
-            sprintf("%f.2", $partialPrice / 100)
+            sprintf("%.2f", $partialPrice / 100)
         );
 
         $this->orderRefundsPage->choosePaymentMethod($paymentMethod);