diff --git a/src/test/java/org/springframework/samples/petclinic/newDataStore/NewOwnerStoreTest.java b/src/test/java/org/springframework/samples/petclinic/newDataStore/NewOwnerStoreTest.java
index 8fc5581b7..cda2d2aa9 100644
--- a/src/test/java/org/springframework/samples/petclinic/newDataStore/NewOwnerStoreTest.java
+++ b/src/test/java/org/springframework/samples/petclinic/newDataStore/NewOwnerStoreTest.java
@@ -13,6 +13,7 @@ import org.junit.Before;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Mock;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.samples.petclinic.owner.Owner;
@@ -37,6 +38,9 @@ public class NewOwnerStoreTest {
     HashMap<Integer, StaticOwner> ownerStore;
 
 
+    @Mock
+    Owner mockOwner;
+
     @Before
     public void setup() {
         testOwnerStore = NewOwnerStore.getInstance(owners);
@@ -110,4 +114,18 @@ public class NewOwnerStoreTest {
     public void consistencyCheck () {
         System.out.println(testOwnerStore.checkConsistency());
     }
+
+    @Test
+    public void checkShadowWrite() {
+        testOwnerStore = NewOwnerStore.getInstance(owners);
+
+       //make sure that inconsisties are recorded and fixed
+       testOwnerStore.testPutInOldDatastoreOnly(mockOwner);
+       assertEquals(1, testOwnerStore.checkConsistency());
+       assertEquals(0, testOwnerStore.checkConsistency());
+
+       //make sure that any changes written to old database are also written to new database
+       testOwnerStore.save(mockOwner);
+       assertEquals(0, testOwnerStore.checkConsistency());
+    }
 }