diff --git a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ConsistentDateParameterValidator.java b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ConsistentDateParameterValidator.java
index b28abcba45..0ee1b6eda1 100644
--- a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ConsistentDateParameterValidator.java
+++ b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ConsistentDateParameterValidator.java
@@ -15,9 +15,6 @@ public class ConsistentDateParameterValidator implements ConstraintValidator<Con
 
     @Override
     public boolean isValid(Object[] value, ConstraintValidatorContext context) {
-        if (value.length != 4 && value.length != 3) {
-            throw new IllegalArgumentException("Illegal method signature");
-        }
 
         if (value[0] == null || value[1] == null) {
             return false;
@@ -27,6 +24,6 @@ public class ConsistentDateParameterValidator implements ConstraintValidator<Con
             throw new IllegalArgumentException("Illegal method signature, expected two parameters of type LocalDate.");
         }
 
-        return ((LocalDate) value[0]).isBefore((LocalDate) value[1]);
+        return ((LocalDate) value[0]).isAfter(LocalDate.now()) && ((LocalDate) value[0]).isBefore((LocalDate) value[1]);
     }
 }
diff --git a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ValidReservationValidator.java b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ValidReservationValidator.java
index 1da257044b..a1cba9a5f6 100644
--- a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ValidReservationValidator.java
+++ b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ValidReservationValidator.java
@@ -16,7 +16,7 @@ public class ValidReservationValidator implements ConstraintValidator<ValidReser
     public boolean isValid(Reservation reservation, ConstraintValidatorContext context) {
 
         if (reservation == null) {
-            return true;
+            return false;
         }
 
         if (!(reservation instanceof Reservation)) {
diff --git a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/model/Reservation.java b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/model/Reservation.java
index 89f13e9e37..a8c01d2be1 100644
--- a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/model/Reservation.java
+++ b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/model/Reservation.java
@@ -4,6 +4,8 @@ import org.baeldung.javaxval.methodvalidation.constraints.ConsistentDateParamete
 import org.baeldung.javaxval.methodvalidation.constraints.ValidReservation;
 import org.springframework.validation.annotation.Validated;
 
+import javax.validation.Valid;
+import javax.validation.constraints.Positive;
 import java.time.LocalDate;
 
 @Validated
@@ -13,8 +15,10 @@ public class Reservation {
 
     private LocalDate end;
 
+    @Valid
     private Customer customer;
 
+    @Positive
     private int room;
 
     @ConsistentDateParameters
diff --git a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/model/ReservationManagement.java b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/model/ReservationManagement.java
index 0aeeb52e1f..f6fec1a15d 100644
--- a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/model/ReservationManagement.java
+++ b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/model/ReservationManagement.java
@@ -30,6 +30,11 @@ public class ReservationManagement {
         // ...
     }
 
+    public void createReservation(@Valid Reservation reservation) {
+
+        // ...
+    }
+
     @NotNull
     @Size(min = 1)
     public List<@NotNull Customer> getAllCustomers() {
@@ -37,13 +42,8 @@ public class ReservationManagement {
         return null;
     }
 
-    public void createNewCustomer(@Valid Customer customer) {
-
-        // ...
-    }
-
     @Valid
-    public Customer getCustomerById() {
+    public Reservation getReservationById(int id) {
 
         return null;
     }
diff --git a/javaxval/src/test/java/org/baeldung/javaxval/methodvalidation/ContainerValidationIntegrationTest.java b/javaxval/src/test/java/org/baeldung/javaxval/methodvalidation/ContainerValidationIntegrationTest.java
index 53133edd48..2363bf8f5d 100644
--- a/javaxval/src/test/java/org/baeldung/javaxval/methodvalidation/ContainerValidationIntegrationTest.java
+++ b/javaxval/src/test/java/org/baeldung/javaxval/methodvalidation/ContainerValidationIntegrationTest.java
@@ -1,6 +1,7 @@
 package org.baeldung.javaxval.methodvalidation;
 
 import org.baeldung.javaxval.methodvalidation.model.Customer;
+import org.baeldung.javaxval.methodvalidation.model.Reservation;
 import org.baeldung.javaxval.methodvalidation.model.ReservationManagement;
 import org.junit.Rule;
 import org.junit.Test;
@@ -69,9 +70,14 @@ public class ContainerValidationIntegrationTest {
         Customer customer = new Customer();
         customer.setFirstName("John");
         customer.setLastName("Doe");
+        Reservation reservation = new Reservation(LocalDate.now()
+            .plusDays(1),
+            LocalDate.now()
+                .plusDays(2),
+            customer, 1);
 
         exception.expect(ConstraintViolationException.class);
-        reservationManagement.createNewCustomer(customer);
+        reservationManagement.createReservation(reservation);
     }
 
     @Test
@@ -80,7 +86,12 @@ public class ContainerValidationIntegrationTest {
         Customer customer = new Customer();
         customer.setFirstName("William");
         customer.setLastName("Smith");
+        Reservation reservation = new Reservation(LocalDate.now()
+            .plusDays(1),
+            LocalDate.now()
+                .plusDays(2),
+            customer, 1);
 
-        reservationManagement.createNewCustomer(customer);
+        reservationManagement.createReservation(reservation);
     }
 }
diff --git a/javaxval/src/test/java/org/baeldung/javaxval/methodvalidation/ValidationIntegrationTest.java b/javaxval/src/test/java/org/baeldung/javaxval/methodvalidation/ValidationIntegrationTest.java
index 6a750698c6..6b53d3a107 100644
--- a/javaxval/src/test/java/org/baeldung/javaxval/methodvalidation/ValidationIntegrationTest.java
+++ b/javaxval/src/test/java/org/baeldung/javaxval/methodvalidation/ValidationIntegrationTest.java
@@ -172,11 +172,16 @@ public class ValidationIntegrationTest {
     public void whenValidationWithInvalidCascadedValue_thenCorrectNumberOfVoilations() throws NoSuchMethodException {
 
         ReservationManagement object = new ReservationManagement();
-        Method method = ReservationManagement.class.getMethod("createNewCustomer", Customer.class);
+        Method method = ReservationManagement.class.getMethod("createReservation", Reservation.class);
         Customer customer = new Customer();
         customer.setFirstName("John");
         customer.setLastName("Doe");
-        Object[] parameterValues = { customer };
+        Reservation reservation = new Reservation(LocalDate.now()
+            .plusDays(1),
+            LocalDate.now()
+                .plusDays(2),
+            customer, 1);
+        Object[] parameterValues = { reservation };
         Set<ConstraintViolation<ReservationManagement>> violations = executableValidator.validateParameters(object, method, parameterValues);
 
         assertEquals(2, violations.size());
@@ -186,11 +191,16 @@ public class ValidationIntegrationTest {
     public void whenValidationWithValidCascadedValue_thenCorrectNumberOfVoilations() throws NoSuchMethodException {
 
         ReservationManagement object = new ReservationManagement();
-        Method method = ReservationManagement.class.getMethod("createNewCustomer", Customer.class);
+        Method method = ReservationManagement.class.getMethod("createReservation", Reservation.class);
         Customer customer = new Customer();
         customer.setFirstName("William");
         customer.setLastName("Smith");
-        Object[] parameterValues = { customer };
+        Reservation reservation = new Reservation(LocalDate.now()
+            .plusDays(1),
+            LocalDate.now()
+                .plusDays(2),
+            customer, 1);
+        Object[] parameterValues = { reservation };
         Set<ConstraintViolation<ReservationManagement>> violations = executableValidator.validateParameters(object, method, parameterValues);
 
         assertEquals(0, violations.size());