diff --git a/src/main/java/com/zufar/icedlatte/cart/api/AddItemsToShoppingCartHelper.java b/src/main/java/com/zufar/icedlatte/cart/api/AddItemsToShoppingCartHelper.java
index 10b35468..cbfd56b9 100644
--- a/src/main/java/com/zufar/icedlatte/cart/api/AddItemsToShoppingCartHelper.java
+++ b/src/main/java/com/zufar/icedlatte/cart/api/AddItemsToShoppingCartHelper.java
@@ -58,13 +58,13 @@ private List<ShoppingCartItem> createItems(Set<NewShoppingCartItemDto> itemsToAd
         Map<UUID, Integer> productsWithQuantity = itemsToAdd.stream()
                 .collect(Collectors.toMap(NewShoppingCartItemDto::getProductId, NewShoppingCartItemDto::getProductQuantity));
 
-        Set<UUID> existedProductIds = shoppingCart.getItems().stream()
+        Set<UUID> existingProductIds = shoppingCart.getItems().stream()
                 .map(ShoppingCartItem::getProductInfo)
                 .map(ProductInfo::getProductId)
                 .collect(Collectors.toSet());
 
         Set<UUID> newProductIds = productsWithQuantity.keySet().stream()
-                .filter(productId -> !existedProductIds.contains(productId))
+                .filter(productId -> !existingProductIds.contains(productId))
                 .collect(Collectors.toSet());
 
         return productInfoRepository.findAllById(newProductIds).stream()
diff --git a/src/main/java/com/zufar/icedlatte/email/exception/TimeTokenException.java b/src/main/java/com/zufar/icedlatte/email/exception/TimeTokenException.java
index 1eeb58cd..a86b7c9c 100644
--- a/src/main/java/com/zufar/icedlatte/email/exception/TimeTokenException.java
+++ b/src/main/java/com/zufar/icedlatte/email/exception/TimeTokenException.java
@@ -17,9 +17,9 @@ public TimeTokenException(String email, OffsetDateTime expireTime) {
 
     private static String buildMessageError(String email, OffsetDateTime expireTime) {
         StringBuilder stringBuilder = new StringBuilder();
-        Duration restTime = Duration.between(OffsetDateTime.now(), expireTime);
-        long minutes = restTime.toMinutesPart();
-        long seconds = restTime.toSecondsPart();
+        Duration remainingTime = Duration.between(OffsetDateTime.now(), expireTime);
+        long minutes = remainingTime.toMinutesPart();
+        long seconds = remainingTime.toSecondsPart();
 
         stringBuilder.append("Token for email '").append(email).append("' will be expired after: ");
         if (minutes != 0) {