diff --git a/spring-5/src/main/java/com/baeldung/assertions/Car.java b/spring-5/src/main/java/com/baeldung/assertions/Car.java
index 210fca5cf3..abff27f0b0 100644
--- a/spring-5/src/main/java/com/baeldung/assertions/Car.java
+++ b/spring-5/src/main/java/com/baeldung/assertions/Car.java
@@ -99,7 +99,9 @@ public class Car {
         car.fuel();
 
         car.сhangeOil("oil");
-        car.сhangeOilWithIsNull(null);
+        
+        CarBattery carBattery = new CarBattery();
+        car.replaceBattery(carBattery);
 
         car.сhangeEngine(new ToyotaEngine());