diff --git a/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/actionmanager/project/EXCELParserTest.java b/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/actionmanager/project/EXCELParserTest.java
index 6c309acb3..cc36421a0 100644
--- a/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/actionmanager/project/EXCELParserTest.java
+++ b/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/actionmanager/project/EXCELParserTest.java
@@ -20,7 +20,7 @@ import eu.dnetlib.dhp.collection.HttpConnector2;
 public class EXCELParserTest {
 
 	private static Path workingDir;
-	private HttpConnector2 httpConnector = new HttpConnector2();
+	private final HttpConnector2 httpConnector = new HttpConnector2();
 	private static final String URL = "https://cordis.europa.eu/data/reference/cordisref-h2020topics.xlsx";
 
 	@BeforeAll
diff --git a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/PatchRelationApplicationTest.java b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/PatchRelationApplicationTest.java
index c8158c044..c9c32edd9 100644
--- a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/PatchRelationApplicationTest.java
+++ b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/PatchRelationApplicationTest.java
@@ -81,8 +81,8 @@ public class PatchRelationApplicationTest {
 		PatchRelationsApplication.main(new String[] {
 			"-isSparkSessionManaged", Boolean.FALSE.toString(),
 			"-graphBasePath", graphBasePath,
-			"-workingDir", workingDir.toString() + "/workingDir",
-			"-idMappingPath", workingDir.toString() + "/" + ID_MAPPING_PATH
+			"-workingDir", workingDir + "/workingDir",
+			"-idMappingPath", workingDir + "/" + ID_MAPPING_PATH
 		});
 
 		final List<Relation> rels = spark