diff --git a/repository-services/isajson-biosamples/src/test/java/com/elixir/biohackaton/ISAToSRA/BiosampleReceiptToMarsTest.java b/repository-services/isajson-biosamples/src/test/java/com/elixir/biohackaton/ISAToSRA/BiosampleReceiptToMarsTest.java
index bfb1378..20987bd 100644
--- a/repository-services/isajson-biosamples/src/test/java/com/elixir/biohackaton/ISAToSRA/BiosampleReceiptToMarsTest.java
+++ b/repository-services/isajson-biosamples/src/test/java/com/elixir/biohackaton/ISAToSRA/BiosampleReceiptToMarsTest.java
@@ -1,13 +1,6 @@
 /** Elixir BioHackathon 2022 */
 package com.elixir.biohackaton.ISAToSRA;
 
-import com.elixir.biohackaton.ISAToSRA.biosamples.model.BiosampleAccessionsMap;
-import com.elixir.biohackaton.ISAToSRA.biosamples.service.BioSamplesSubmitter;
-import com.elixir.biohackaton.ISAToSRA.biosamples.service.MarsReceiptService;
-import com.elixir.biohackaton.ISAToSRA.receipt.isamodel.*;
-import com.elixir.biohackaton.ISAToSRA.receipt.marsmodel.*;
-import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import java.io.File;
 import java.nio.file.Files;
 import java.util.List;
@@ -15,6 +8,14 @@
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import com.elixir.biohackaton.ISAToSRA.biosamples.model.BiosampleAccessionsMap;
+import com.elixir.biohackaton.ISAToSRA.biosamples.service.BioSamplesSubmitter;
+import com.elixir.biohackaton.ISAToSRA.biosamples.service.MarsReceiptService;
+import com.elixir.biohackaton.ISAToSRA.receipt.isamodel.IsaJson;
+import com.elixir.biohackaton.ISAToSRA.receipt.isamodel.Study;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 @SpringBootTest
 class BiosampleReceiptToMarsTest {
 
@@ -43,11 +44,11 @@ void convertToMars() {
 
       // Converting Biosample receipt to MARS receipt
       MarsReceiptService marsReceiptService = new MarsReceiptService();
-      MarsReceipt marsReceipt = marsReceiptService.convertReceiptToMars(accessionsMap, isaJson);
+      marsReceiptService.convertReceiptToMars(accessionsMap, isaJson);
 
       // Saving the result as a Json file
       String marsReceiptPath = "../../test-data/mars-biosample-receipt.json";
-      Files.write(new File(marsReceiptPath).toPath(), jsonMapper.writeValueAsBytes(marsReceipt));
+      Files.write(new File(marsReceiptPath).toPath(), jsonMapper.writeValueAsBytes(marsReceiptService.getMarsReceipt()));
     } catch (Exception ex) {
       System.console().printf("%s", ex);
     }