diff --git a/src/main/java/cat/hack3/codingtests/marsrover/ui/RoverInitializer.java b/src/main/java/cat/hack3/codingtests/marsrover/ui/RoverInitializer.java
index 988de25..ca4eaf0 100644
--- a/src/main/java/cat/hack3/codingtests/marsrover/ui/RoverInitializer.java
+++ b/src/main/java/cat/hack3/codingtests/marsrover/ui/RoverInitializer.java
@@ -12,7 +12,7 @@ import java.util.Scanner;
 import static cat.hack3.codingtests.marsrover.ui.UICommons.output;
 
 public class RoverInitializer {
-    private Scanner reader;
+    private final Scanner reader;
     private final DirectionRetriever directionRetriever;
 
 
@@ -64,6 +64,7 @@ public class RoverInitializer {
         return deployRover(10, 10, 2, 3, Direction.SOUTH, obstacles);
     }
 
+    @SafeVarargs
     private MarsRover deployRover(int mapHeight, int mapWidth, int latitudeStartingPoint, int longitudeStartingPoint, Direction startingDirection, List<Coordinates>... obstaclesLocalizations) {
         var startingCoordinates = Coordinates.of(latitudeStartingPoint, longitudeStartingPoint);
         var marsMap = new MarsMap(mapHeight, mapWidth, startingCoordinates, obstaclesLocalizations);