diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/engine/pattern/Query.java b/src/main/java/fr/inria/corese/core/next/query/impl/engine/pattern/Query.java
index 630732d77..a038bf15f 100644
--- a/src/main/java/fr/inria/corese/core/next/query/impl/engine/pattern/Query.java
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/engine/pattern/Query.java
@@ -15,7 +15,6 @@
 
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
diff --git a/src/test/java/fr/inria/corese/core/next/data/impl/io/parser/support/ParserTestBase.java b/src/test/java/fr/inria/corese/core/next/data/impl/io/parser/support/ParserTestBase.java
index 375db4c50..cfdd22276 100644
--- a/src/test/java/fr/inria/corese/core/next/data/impl/io/parser/support/ParserTestBase.java
+++ b/src/test/java/fr/inria/corese/core/next/data/impl/io/parser/support/ParserTestBase.java
@@ -6,7 +6,6 @@
 import fr.inria.corese.core.next.data.impl.io.serializer.rdfc10.RDFC10Canonicalizer;
 import fr.inria.corese.core.next.data.impl.io.serializer.rdfc10.RDFC10SerializerOptions;
 import fr.inria.corese.core.next.storage.Storages;
-import fr.inria.corese.core.next.storage.api.config.StorageConfig;
 import fr.inria.corese.core.next.storage.impl.model.StorageModel;
 import org.junit.jupiter.api.BeforeEach;
 
diff --git a/src/test/java/fr/inria/corese/core/next/query/impl/sparql/execution/ProgressiveSelectTest.java b/src/test/java/fr/inria/corese/core/next/query/impl/sparql/execution/ProgressiveSelectTest.java
index 5753f0a59..1ba88aaf4 100644
--- a/src/test/java/fr/inria/corese/core/next/query/impl/sparql/execution/ProgressiveSelectTest.java
+++ b/src/test/java/fr/inria/corese/core/next/query/impl/sparql/execution/ProgressiveSelectTest.java
@@ -6,7 +6,6 @@
 import fr.inria.corese.core.next.query.api.exception.QueryEvaluationException;
 import fr.inria.corese.core.next.query.api.exception.QueryTimeoutException;
 import fr.inria.corese.core.next.query.api.repository.Repository;
-import fr.inria.corese.core.next.query.api.result.TupleQueryResult;
 import fr.inria.corese.core.next.storage.api.StorageManager;
 import fr.inria.corese.core.next.storage.api.exception.ErrorCode;
 import fr.inria.corese.core.next.storage.api.exception.StorageException;
diff --git a/src/test/java/fr/inria/corese/core/next/storage/impl/memory/LazyProducerTest.java b/src/test/java/fr/inria/corese/core/next/storage/impl/memory/LazyProducerTest.java
index 1b37d6117..47d0b6077 100644
--- a/src/test/java/fr/inria/corese/core/next/storage/impl/memory/LazyProducerTest.java
+++ b/src/test/java/fr/inria/corese/core/next/storage/impl/memory/LazyProducerTest.java
@@ -10,7 +10,6 @@
 import fr.inria.corese.core.next.query.impl.engine.eval.SparqlKgramEvaluator;
 import fr.inria.corese.core.next.query.impl.engine.event.ResultListener;
 import fr.inria.corese.core.next.query.impl.engine.model.Edge;
-import fr.inria.corese.core.next.query.impl.engine.model.Node;
 import fr.inria.corese.core.next.query.impl.engine.pattern.Exp;
 import fr.inria.corese.core.next.query.impl.engine.spi.Environment;
 import fr.inria.corese.core.next.query.impl.engine.storage.StorageManagerProducer;
@@ -21,7 +20,6 @@
 import fr.inria.corese.core.next.storage.Storages;
 import fr.inria.corese.core.next.storage.api.StorageManager;
 import fr.inria.corese.core.next.storage.api.config.StorageConfig;
-import fr.inria.corese.core.next.storage.api.model.StatementPattern;
 import fr.inria.corese.core.next.storage.api.operations.QueryOperations;
 import org.junit.jupiter.api.Test;
 
@@ -33,7 +31,6 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Consumer;
-import java.util.stream.Stream;
 
 import static org.junit.jupiter.api.Assertions.*;
 import static org.mockito.ArgumentMatchers.*;