diff --git a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/group/GroupEntitiesSparkJobTest.java b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/group/GroupEntitiesSparkJobTest.java
index 5214c17833..729948f523 100644
--- a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/group/GroupEntitiesSparkJobTest.java
+++ b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/group/GroupEntitiesSparkJobTest.java
@@ -1,12 +1,12 @@
 
 package eu.dnetlib.dhp.oa.graph.group;
 
-import com.fasterxml.jackson.databind.DeserializationFeature;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import eu.dnetlib.dhp.common.HdfsSupport;
-import eu.dnetlib.dhp.oa.merge.GroupEntitiesSparkJob;
-import eu.dnetlib.dhp.schema.common.ModelSupport;
-import eu.dnetlib.dhp.schema.oaf.Result;
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.spark.SparkConf;
@@ -17,75 +17,76 @@ import org.apache.spark.sql.Encoders;
 import org.apache.spark.sql.SparkSession;
 import org.junit.jupiter.api.*;
 
-import java.io.IOException;
-import java.net.URISyntaxException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import eu.dnetlib.dhp.oa.merge.GroupEntitiesSparkJob;
+import eu.dnetlib.dhp.schema.common.ModelSupport;
+import eu.dnetlib.dhp.schema.oaf.Result;
 
 public class GroupEntitiesSparkJobTest {
 
-    private static SparkSession spark;
+	private static SparkSession spark;
 
-    private Path workingDir;
-    //private Path inputDir;
-    private Path graphInputPath;
+	private Path workingDir;
+	private Path graphInputPath;
 
-    private Path outputPath;
+	private Path outputPath;
 
-    @BeforeAll
-    public static void beforeAll() {
-        SparkConf conf = new SparkConf();
-        conf.setAppName(GroupEntitiesSparkJob.class.getSimpleName());
-        conf.setMaster("local");
-        conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer");
-        conf.registerKryoClasses(ModelSupport.getOafModelClasses());
-        spark = SparkSession.builder().config(conf).getOrCreate();
-    }
+	@BeforeAll
+	public static void beforeAll() {
+		SparkConf conf = new SparkConf();
+		conf.setAppName(GroupEntitiesSparkJob.class.getSimpleName());
+		conf.setMaster("local");
+		conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer");
+		conf.registerKryoClasses(ModelSupport.getOafModelClasses());
+		spark = SparkSession.builder().config(conf).getOrCreate();
+	}
 
-    @BeforeEach
-    public void beforeEach() throws IOException, URISyntaxException {
-        workingDir = Files.createTempDirectory(GroupEntitiesSparkJob.class.getSimpleName());
-        //inputDir = workingDir.resolve("input");
-        graphInputPath = Paths.get(ClassLoader.getSystemResource("eu/dnetlib/dhp/oa/graph/group").toURI());
-        outputPath = workingDir.resolve("output");
-    }
+	@BeforeEach
+	public void beforeEach() throws IOException, URISyntaxException {
+		workingDir = Files.createTempDirectory(GroupEntitiesSparkJob.class.getSimpleName());
+		graphInputPath = Paths.get(ClassLoader.getSystemResource("eu/dnetlib/dhp/oa/graph/group").toURI());
+		outputPath = workingDir.resolve("output");
+	}
 
-    @AfterEach
-    public void afterEach() throws IOException {
-        FileUtils.deleteDirectory(workingDir.toFile());
-    }
+	@AfterEach
+	public void afterEach() throws IOException {
+		FileUtils.deleteDirectory(workingDir.toFile());
+	}
 
-    @AfterAll
-    public static void afterAll() {
-        spark.stop();
-    }
+	@AfterAll
+	public static void afterAll() {
+		spark.stop();
+	}
 
-    @Test
-    void testGroupEntities() throws Exception {
-        GroupEntitiesSparkJob.main(new String[] {
-                "-isSparkSessionManaged",
-                Boolean.FALSE.toString(),
-                "-graphInputPath",
-                graphInputPath.toString(),
-                "-outputPath",
-                outputPath.toString()
-        });
+	@Test
+	void testGroupEntities() throws Exception {
+		GroupEntitiesSparkJob.main(new String[] {
+			"-isSparkSessionManaged",
+			Boolean.FALSE.toString(),
+			"-graphInputPath",
+			graphInputPath.toString(),
+			"-outputPath",
+			outputPath.toString()
+		});
 
-        ObjectMapper mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-        Dataset<Result> output = spark
-                .read()
-                .textFile(outputPath.toString())
-                .map((MapFunction<String, String>) s -> StringUtils.substringAfter(s, "|"), Encoders.STRING())
-                .map((MapFunction<String, Result>) s -> mapper.readValue(s, Result.class), Encoders.bean(Result.class));
+		ObjectMapper mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+		Dataset<Result> output = spark
+			.read()
+			.textFile(outputPath.toString())
+			.map((MapFunction<String, String>) s -> StringUtils.substringAfter(s, "|"), Encoders.STRING())
+			.map((MapFunction<String, Result>) s -> mapper.readValue(s, Result.class), Encoders.bean(Result.class));
 
-        Assertions.assertEquals(
-                1,
-                output
-                .filter((FilterFunction<Result>) r ->
-                        "50|doi_________::09821844208a5cd6300b2bfb13bca1b9".equals(r.getId()) &&
-                        r.getCollectedfrom().stream().anyMatch(kv -> kv.getValue().equalsIgnoreCase("zenodo")) )
-                .count());
-    }
+		Assertions
+			.assertEquals(
+				1,
+				output
+					.filter(
+						(FilterFunction<Result>) r -> "50|doi_________::09821844208a5cd6300b2bfb13bca1b9"
+							.equals(r.getId()) &&
+							r.getCollectedfrom().stream().anyMatch(kv -> kv.getValue().equalsIgnoreCase("zenodo")))
+					.count());
+	}
 
 }