diff --git a/dao/src/test/java/com/iluwatar/dao/CustomerDaoImplTest.java b/dao/src/test/java/com/iluwatar/dao/CustomerDaoImplTest.java
index e5e5eb220..230314d80 100644
--- a/dao/src/test/java/com/iluwatar/dao/CustomerDaoImplTest.java
+++ b/dao/src/test/java/com/iluwatar/dao/CustomerDaoImplTest.java
@@ -84,7 +84,7 @@ public class CustomerDaoImplTest {
 
   @Test
   public void getNonExistinCustomerById() {
-    final int nonExistingId = 999;
+    final int nonExistingId = getNonExistingCustomerId();
     assertNull(impl.getCustomerById(nonExistingId));
   }