diff --git a/src/test/java/de/rwu/easydrop/service/retriever/OfferRetrieverTest.java b/src/test/java/de/rwu/easydrop/service/retriever/OfferRetrieverTest.java
index f29059a..d994e46 100644
--- a/src/test/java/de/rwu/easydrop/service/retriever/OfferRetrieverTest.java
+++ b/src/test/java/de/rwu/easydrop/service/retriever/OfferRetrieverTest.java
@@ -1,6 +1,7 @@
 package de.rwu.easydrop.service.retriever;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -16,6 +17,7 @@ import de.rwu.easydrop.api.client.AmazonProductDataSource;
 import de.rwu.easydrop.api.client.DataSourceFactory;
 import de.rwu.easydrop.api.client.EbayItemDataSource;
 import de.rwu.easydrop.api.dto.OfferDTO;
+import de.rwu.easydrop.api.dto.ProductDTO;
 import de.rwu.easydrop.data.connector.OfferPersistenceInterface;
 import de.rwu.easydrop.model.Offer;
 import de.rwu.easydrop.util.Config;
@@ -53,6 +55,12 @@ class OfferRetrieverTest {
 
     @Test
     void getOfferFromPersistence(){
+
+        // a mock ProductDTO object to return from the offerDTO mock
+        ProductDTO productDTO = mock(ProductDTO.class);
+        when(productDTO.isAvailable()).thenReturn(false);
+
+
         //Arrange
         String offerId = "187";
         String lastUpdate = "2023-01-01";