diff --git a/src/test/java/org/gcube/dataharvest/AccountingDataHarvesterJupyterTest.java b/src/test/java/org/gcube/dataharvest/AccountingDataHarvesterJupyterTest.java
index 6ab1b6d..7746460 100644
--- a/src/test/java/org/gcube/dataharvest/AccountingDataHarvesterJupyterTest.java
+++ b/src/test/java/org/gcube/dataharvest/AccountingDataHarvesterJupyterTest.java
@@ -8,7 +8,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.SortedSet;
-import java.util.TreeSet;
 
 import org.gcube.accounting.accounting.summary.access.AccountingDao;
 import org.gcube.accounting.accounting.summary.access.model.ScopeDescriptor;