diff --git a/dnet-dedup-test/src/main/java/eu/dnetlib/ClusteringTester.java b/dnet-dedup-test/src/main/java/eu/dnetlib/ClusteringTester.java
deleted file mode 100644
index b701363..0000000
--- a/dnet-dedup-test/src/main/java/eu/dnetlib/ClusteringTester.java
+++ /dev/null
@@ -1,115 +0,0 @@
-package eu.dnetlib;
-
-import eu.dnetlib.pace.config.DedupConfig;
-import eu.dnetlib.pace.model.MapDocument;
-import eu.dnetlib.pace.util.MapDocumentUtil;
-import eu.dnetlib.pace.utils.Utility;
-import eu.dnetlib.support.Block;
-import org.apache.commons.io.IOUtils;
-import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.JavaDoubleRDD;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.DoubleFunction;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.sql.SparkSession;
-import scala.Tuple2;
-
-import java.io.BufferedReader;
-import java.io.FileReader;
-import java.io.IOException;
-
-public class ClusteringTester {
-
-    public static void main(String[] args) throws Exception {
-
-        String configPath = args[0];
-        String entitiesPath = args[1];
-
-        new ClusteringTester()
-                .run(configPath, entitiesPath);
-    }
-
-    public void run(String configPath, String entitiesPath) throws IOException {
-
-        DedupConfig dedupConf = DedupConfig.load(readJson(configPath));
-
-        SparkSession spark = SparkSession
-                .builder()
-                .appName("ClusteringTester")
-                .master("local[*]")
-                .getOrCreate();
-
-        JavaSparkContext sc = JavaSparkContext.fromSparkContext(spark.sparkContext());
-
-        JavaPairRDD<String, MapDocument> mapDocuments = sc
-                .textFile(entitiesPath)
-                .mapToPair(
-                        (PairFunction<String, String, MapDocument>) s -> {
-                            MapDocument d = MapDocumentUtil.asMapDocumentWithJPath(dedupConf, s);
-                            return new Tuple2<>(d.getIdentifier(), d);
-                        });
-
-        long totalRecords = mapDocuments.count();
-
-        // create blocks for deduplication
-        JavaPairRDD<String, Block> blocks = Deduper.createSortedBlocks(mapDocuments, dedupConf);
-
-        //block_key, cardinality, comparisons
-        JavaRDD<Tuple2<String, Tuple2<Integer, Long>>> blockStats = blocks.map(b -> new Tuple2<>(b._1(), new Tuple2<>((b._2().elements()), comparisonsNumber(b._2(), dedupConf))));
-
-        Long totalComparisons = blockStats.map(b -> b._2()._2()).reduce((a, b) -> a + b);
-
-        Long blocksNumber = blockStats.count();
-
-        JavaDoubleRDD blockSizeRDD = blockStats.mapToDouble(b -> Double.parseDouble(b._2()._1().toString()));
-
-        Double maxBlockSize = blockSizeRDD.max();
-
-        double[] buckets = new double[(int) (maxBlockSize/10 + 3)];
-
-        double bucketSize = 10.0;
-
-        double bucketBase = 0.0;
-        for (int i=0; i < buckets.length; i++) {
-            buckets[i] = bucketBase;
-            bucketBase += bucketSize;
-        }
-
-        long[] histogram = blockSizeRDD.histogram(buckets);
-
-        System.out.println("b | n");
-        for (int i=0; i< histogram.length; i++) {
-            System.out.println(buckets[i] + " | " + histogram[i]);
-        }
-
-        System.out.println("max block size = " + maxBlockSize);
-        System.out.println("number of records = " + totalRecords);
-        System.out.println("number of blocks = " + blocksNumber);
-        System.out.println("total number of comparisons = " + totalComparisons);
-    }
-
-    //compute the number of comparisons considering the sliding window
-    public static Long comparisonsNumber(Block b, DedupConfig dedupConfig){
-        long blockSize = b.elements();
-        long slidingWindowSize = dedupConfig.getWf().getSlidingWindowSize();
-        if (slidingWindowSize >= blockSize)
-            return ((slidingWindowSize*(slidingWindowSize-1))/2);
-        return (blockSize-slidingWindowSize+1)*((slidingWindowSize*(slidingWindowSize-1))/2);
-    }
-
-    public String readJson(String fileName) throws IOException {
-        BufferedReader reader = new BufferedReader(new FileReader(fileName));
-        StringBuilder stringBuilder = new StringBuilder();
-        char[] buffer = new char[10];
-        while (reader.read(buffer) != -1) {
-            stringBuilder.append(new String(buffer));
-            buffer = new char[10];
-        }
-        reader.close();
-
-        return stringBuilder.toString();
-    }
-
-}
diff --git a/dnet-dedup-test/src/test/java/eu/dnetlib/pace/DedupLocalTest.java b/dnet-dedup-test/src/test/java/eu/dnetlib/pace/DedupLocalTest.java
index 2e08a69..62a56c8 100644
--- a/dnet-dedup-test/src/test/java/eu/dnetlib/pace/DedupLocalTest.java
+++ b/dnet-dedup-test/src/test/java/eu/dnetlib/pace/DedupLocalTest.java
@@ -1,30 +1,12 @@
 package eu.dnetlib.pace;
 
-import eu.dnetlib.ClusteringTester;
 import eu.dnetlib.Deduper;
 import eu.dnetlib.pace.config.DedupConfig;
-import eu.dnetlib.pace.model.Field;
-import eu.dnetlib.pace.model.MapDocument;
-import eu.dnetlib.pace.tree.support.TreeProcessor;
-import eu.dnetlib.pace.tree.support.TreeStats;
-import eu.dnetlib.pace.util.MapDocumentUtil;
 import eu.dnetlib.pace.utils.Utility;
-import eu.dnetlib.support.Block;
-import eu.dnetlib.support.ConnectedComponent;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.PairFunction;
 import org.apache.spark.sql.SparkSession;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
-import scala.Tuple2;
-
-import java.io.IOException;
-import java.net.URL;
-import java.util.List;
-import java.util.Map;
 
 public class DedupLocalTest extends DedupTestUtils {