diff --git a/src/test/java/org/gcube/phd/Statistics.java b/src/test/java/org/gcube/phd/Statistics.java
index 4d2136d..213510c 100644
--- a/src/test/java/org/gcube/phd/Statistics.java
+++ b/src/test/java/org/gcube/phd/Statistics.java
@@ -64,6 +64,9 @@ public class Statistics extends ScopedTest {
 		}
 		String unmarshalledGR = getUnmarshalledResource(gr);
 		File xmlFile = new File(directory, uuid.toString()+".xml");
+		if(xmlFile.exists()) {
+			xmlFile.delete();
+		}
 		printLineToFile(unmarshalledGR, xmlFile);
 		
 		final byte[] grUTF8Bytes = unmarshalledGR.getBytes("UTF-8");
@@ -71,6 +74,9 @@ public class Statistics extends ScopedTest {
 		stringBuffer.append(",");
 		String unmarshalledR = ISMapper.marshal(r);
 		File jsonFile = new File(directory, uuid.toString()+".json");
+		if(jsonFile.exists()) {
+			jsonFile.delete();
+		}
 		printLineToFile(unmarshalledR, jsonFile);
 		
 		final byte[] rUTF8Bytes = unmarshalledR.getBytes("UTF-8");
@@ -88,7 +94,13 @@ public class Statistics extends ScopedTest {
 		directory =  new File("/home/lucafrosini/Dropbox/Dottorato/Review Tesi");
 		
 		File eServicesFile = new File(directory, "EService.csv");
+		if(eServicesFile.exists()) {
+			eServicesFile.delete();
+		}
 		File hostingNodeFile = new File(directory, "HostingNode.csv");
+		if(hostingNodeFile.exists()) {
+			hostingNodeFile.delete();
+		}
 		
 		List<UUID> serviceIDs = new ArrayList<>();
 		// Data Tansfer Service