diff --git a/build.xml b/build.xml
index 307e000acbcbea7b29ae606758ff49a3f4c76191..ccd41462e945a585c0a11a3f277f08fad3176c2c 100644
--- a/build.xml
+++ b/build.xml
@@ -305,9 +305,9 @@
   <target name="test" depends="bind" description="Unit test code">
     <echo message="Testing..."/>
     <taskdef name="testng" classpath="${tooldir}/testng/testng.jar" classname="org.testng.TestNGAntTask" />
-
     <javac srcdir="test/src" includeantruntime="false" destdir="test/classes" debug="on"
 	   classpath="tools/testng/testng.jar" encoding="iso8859-15">
+      <!--compilerarg value="-Xlint:all"/-->
       <classpath refid="classpath"/>
     </javac>
     <!-- possible groups: raw=impl+serv+io+onto+omwg, full=raw+ling+sem -->
diff --git a/test/src/AlgTest.java b/test/src/AlgTest.java
index bd8d0766e0e7cdb783763d7d9cdd5a4d8ce61ba0..4b7edd8c473288de68bd5b7ec77106969e6f7edd 100644
--- a/test/src/AlgTest.java
+++ b/test/src/AlgTest.java
@@ -24,7 +24,6 @@ import static org.testng.Assert.assertNotNull;
 import static org.testng.Assert.assertNull;
 import static org.testng.Assert.assertTrue;
 import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Configuration;
 import org.testng.annotations.Test;
 //import org.testng.annotations.*;
 
diff --git a/test/src/JWNLTest.java b/test/src/JWNLTest.java
index 85c476347b4887e1e4f606ea7d59ac6422109dcc..e358d4f0659f2891f435a50536b4b2d115bf1875 100644
--- a/test/src/JWNLTest.java
+++ b/test/src/JWNLTest.java
@@ -23,7 +23,6 @@ import static org.testng.Assert.assertNotNull;
 import static org.testng.Assert.assertNull;
 import static org.testng.Assert.assertTrue;
 import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Configuration;
 import org.testng.annotations.Test;
 import org.testng.annotations.BeforeSuite;
 
diff --git a/test/src/MatcherTest.java b/test/src/MatcherTest.java
index be75873f5c67853097a0381642165be6f6396d00..439f8384570fa049321ddd61268d9f8cc0194f97 100644
--- a/test/src/MatcherTest.java
+++ b/test/src/MatcherTest.java
@@ -1,7 +1,7 @@
 /*
  * $Id$
  *
- * Copyright (C) INRIA, 2008-2011
+ * Copyright (C) INRIA, 2008-2011, 2013
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -18,14 +18,13 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
-//package test.com.acme.dona.dep;
+//package 
 
 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.assertNotNull;
 import static org.testng.Assert.assertNull;
 import static org.testng.Assert.assertTrue;
 import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Configuration;
 import org.testng.annotations.Test;
 //import org.testng.annotations.*;
 
diff --git a/test/src/OntoTest.java b/test/src/OntoTest.java
index f178dba240310ec4dbfe75785f232146b0c57948..e560693e2809b140d59460694ed26c8946962c0e 100644
--- a/test/src/OntoTest.java
+++ b/test/src/OntoTest.java
@@ -165,6 +165,7 @@ public class OntoTest {
     }
 
     @Test(groups = { "full", "onto", "raw" }, dependsOnMethods = {"loadedTest"})
+    @SuppressWarnings("unchecked") // see below
     public void heavyLoadedTest() throws Exception {
 	// load ontologies
 	OntologyFactory.setDefaultFactory("fr.inrialpes.exmo.ontowrap.owlapi30.OWLAPI3OntologyFactory");
@@ -232,6 +233,7 @@ public class OntoTest {
 	// Specific HeavyLoadedTests
 	assertEquals( onto.getSubProperties( o, OntologyFactory.LOCAL, OntologyFactory.ASSERTED, OntologyFactory.NAMED ).size(), 0 );
 	assertEquals( onto.getSuperProperties( o, OntologyFactory.LOCAL, OntologyFactory.ASSERTED, OntologyFactory.NAMED ).size(), 0 );
+	// a simple Set would suppress the warning but I like to understand
 	Set<Object> scl = onto.getRange( o, OntologyFactory.ASSERTED );
 	assertEquals( scl.size(), 1 );
 	Object o2 = onto.getEntity( new URI( "http://ebiquity.umbc.edu/v2.1/ontology/person.owl#Person" ) );
diff --git a/test/src/OntologyNetworkTest.java b/test/src/OntologyNetworkTest.java
index fda54b399b9a6baabdec1d148a56aee5b5ec8a71..143af60adf2e489ad9c3db7e452fdead8be377d8 100644
--- a/test/src/OntologyNetworkTest.java
+++ b/test/src/OntologyNetworkTest.java
@@ -1,7 +1,7 @@
 /*
  * $Id$
  *
- * Copyright (C) INRIA, 2008-2011
+ * Copyright (C) INRIA, 2008-2011, 2013
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -23,7 +23,6 @@ import static org.testng.Assert.assertNotNull;
 import static org.testng.Assert.assertNull;
 import static org.testng.Assert.assertTrue;
 import org.testng.annotations.BeforeClass;
-import org.testng.annotations.Configuration;
 import org.testng.annotations.Test;
 //import org.testng.annotations.*;