diff --git a/src/test/java/org/gcube/documentstore/persistence/PersistencePostgreSQLTest.java b/src/test/java/org/gcube/documentstore/persistence/PersistencePostgreSQLTest.java
index 07e73b0..49468a9 100644
--- a/src/test/java/org/gcube/documentstore/persistence/PersistencePostgreSQLTest.java
+++ b/src/test/java/org/gcube/documentstore/persistence/PersistencePostgreSQLTest.java
@@ -63,6 +63,7 @@ public class PersistencePostgreSQLTest extends ContextTest {
 	public static final int maxDuration = 450;
 	
 	private static final Random random;
+	
 	static {
 		random = new Random();
 		minutesInAnYear = (int) TimeUnit.DAYS.toMinutes(365); 
@@ -79,13 +80,9 @@ public class PersistencePostgreSQLTest extends ContextTest {
 		serviceUsageRecord.setHost("host" +  (25-randomNumber) + ".d4science.org");
 	}
 	
-	public static String getRandomUser() {
-		int randomNumber = random.nextInt(users.length);
-		return users[randomNumber];
-	}
-	
 	public static void setConsumerId(AggregatedServiceUsageRecord serviceUsageRecord) throws Exception {
-		serviceUsageRecord.setConsumerId(getRandomUser());
+		int randomNumber = random.nextInt(users.length);
+		serviceUsageRecord.setConsumerId(users[randomNumber]);
 	}
 	
 	public static void setServiceClassAndName(AggregatedServiceUsageRecord serviceUsageRecord) throws Exception {