diff --git a/build.xml b/build.xml
index 1f14e057..45298998 100644
--- a/build.xml
+++ b/build.xml
@@ -49,13 +49,13 @@
         <ivy:configure override="true"/>
     </target>
 
-    <target name="install" depends="init-ivy-home,jar"
+    <target name="install" depends="jar"
         description="build Ivy and install it in Ivy user home for builds using Ivy user home to load Ivy jar">
         <property name="ivy.jar.file" value="${ivy.home}/jars/ivy.jar"/>
         <copy file="${artifacts.build.dir}/jars/${final.name}" tofile="${ivy.jar.file}"/>
     </target>
 
-    <target name="install-ant" depends="init-ivy-home,jar"
+    <target name="install-ant" depends="jar"
         description="build Ivy and install it in Ant home lib">
         <condition property="ant.home" value="${env.ANT_HOME}">
             <isset property="env.ANT_HOME"/>
@@ -262,7 +262,7 @@
                 todir="${ant.classes.build.dir}/fr/jayasoft/ivy/ant"/>
     </target>
 
-    <target name="compile-optional" depends="compile-ant,resolve">
+    <target name="compile-optional" depends="compile-ant">
         <javac  srcdir="${src.dir}"
                 destdir="${optional.classes.build.dir}"
                 sourcepath=""
@@ -456,6 +456,11 @@
               message="At least one test has failed. See logs (in ${test.xml.dir}) for details (use the target test-report to run the test with a report)"/>
     </target>
 
+    <target name="check-ibiblio" depends="build-test">
+        <java classname="org.apache.ivy.plugins.resolver.IBiblioHelper"
+              classpathref="test.classpath"/>
+    </target>
+
     <!-- =================================================================
          REPORTS AND DOCUMENTATION
          ================================================================= -->
@@ -550,7 +555,7 @@
         <taskdef uri="antlib:com.puppycrawl.tools.checkstyle.ant"
                  resource="com/puppycrawl/tools/checkstyle/ant/antlib.xml" classpathref="checkstyle.classpath"/>
     </target>
-    
+
     <!-- Checks Ivy codebase according to ${checkstyle.src.dir}/checkstyle-config  -->
     <target name="checkstyle-internal" depends="init-checkstyle">
         <mkdir dir="${checkstyle.report.dir}"/>
diff --git a/src/java/org/apache/ivy/plugins/lock/DeleteOnExitHook.java b/src/java/org/apache/ivy/plugins/lock/DeleteOnExitHook.java
index bb86970a..ea3fe40b 100644
--- a/src/java/org/apache/ivy/plugins/lock/DeleteOnExitHook.java
+++ b/src/java/org/apache/ivy/plugins/lock/DeleteOnExitHook.java
@@ -21,7 +21,7 @@ import java.io.File;
 import java.util.Iterator;
 import java.util.LinkedHashSet;
 
-class DeleteOnExitHook {
+final class DeleteOnExitHook {
 
     static {
         Runtime.getRuntime().addShutdownHook(new Thread() {
diff --git a/src/java/org/apache/ivy/util/DateUtil.java b/src/java/org/apache/ivy/util/DateUtil.java
index fe66e1d9..1190b6ba 100644
--- a/src/java/org/apache/ivy/util/DateUtil.java
+++ b/src/java/org/apache/ivy/util/DateUtil.java
@@ -21,7 +21,7 @@ import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
-public class DateUtil {
+public final class DateUtil {
 
     private DateUtil() {
         // Utility class
diff --git a/src/java/org/apache/ivy/util/EncryptedProperties.java b/src/java/org/apache/ivy/util/EncryptedProperties.java
index cbed9520..26443729 100644
--- a/src/java/org/apache/ivy/util/EncryptedProperties.java
+++ b/src/java/org/apache/ivy/util/EncryptedProperties.java
@@ -29,6 +29,7 @@ import java.util.Properties;
  * putAll puts given values without encrypting them. It this thus recommended to void using them,
  * use setProperty and getProperty instead.
  */
+@SuppressWarnings("serial")
 public class EncryptedProperties extends Properties {
 
     public EncryptedProperties() {
diff --git a/src/java/org/apache/ivy/util/EncrytedProperties.java b/src/java/org/apache/ivy/util/EncrytedProperties.java
index 3242de52..a2a998d5 100644
--- a/src/java/org/apache/ivy/util/EncrytedProperties.java
+++ b/src/java/org/apache/ivy/util/EncrytedProperties.java
@@ -17,10 +17,10 @@
  */
 package org.apache.ivy.util;
 
-
 /**
  * Deprecated because of renaming due spell check.
  */
+@SuppressWarnings("serial")
 @Deprecated
 public class EncrytedProperties extends EncryptedProperties {
 }
\ No newline at end of file
diff --git a/test/java/org/apache/ivy/core/TestPerformance.java b/test/java/org/apache/ivy/core/TestPerformance.java
index 29a91763..64ea1dfc 100644
--- a/test/java/org/apache/ivy/core/TestPerformance.java
+++ b/test/java/org/apache/ivy/core/TestPerformance.java
@@ -140,11 +140,4 @@ public class TestPerformance {
     private ResolveOptions getResolveOptions(String[] confs) {
         return new ResolveOptions().setConfs(confs);
     }
-
-    public static void main(String[] args) throws Exception {
-        TestPerformance t = new TestPerformance();
-        t.setUp();
-        t.testPerfs();
-        t.tearDown();
-    }
 }
diff --git a/test/java/org/apache/ivy/core/module/descriptor/DefaultDependencyDescriptorTest.java b/test/java/org/apache/ivy/core/module/descriptor/DefaultDependencyDescriptorTest.java
index d89813d1..099d9968 100644
--- a/test/java/org/apache/ivy/core/module/descriptor/DefaultDependencyDescriptorTest.java
+++ b/test/java/org/apache/ivy/core/module/descriptor/DefaultDependencyDescriptorTest.java
@@ -19,17 +19,12 @@
 package org.apache.ivy.core.module.descriptor;
 
 import org.junit.Test;
-import org.junit.runner.JUnitCore;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 
 public class DefaultDependencyDescriptorTest {
 
-    public static void main(String[] args) {
-        JUnitCore.runClasses(DefaultDependencyDescriptorTest.class);
-    }
-
     /*
      * Test method for
      * 'org.apache.ivy.DefaultDependencyDescriptor.replaceSelfFallbackPattern(String, String)'
diff --git a/test/java/org/apache/ivy/core/settings/XmlSettingsParserTest.java b/test/java/org/apache/ivy/core/settings/XmlSettingsParserTest.java
index 6bbd8853..e3db0424 100644
--- a/test/java/org/apache/ivy/core/settings/XmlSettingsParserTest.java
+++ b/test/java/org/apache/ivy/core/settings/XmlSettingsParserTest.java
@@ -17,13 +17,17 @@
  */
 package org.apache.ivy.core.settings;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
 import java.io.File;
 import java.io.IOException;
 import java.text.ParseException;
 import java.util.List;
 
 import org.apache.ivy.core.cache.DefaultRepositoryCacheManager;
-import org.apache.ivy.core.cache.RepositoryCacheManager;
 import org.apache.ivy.core.cache.ResolutionCacheManager;
 import org.apache.ivy.core.module.descriptor.Artifact;
 import org.apache.ivy.core.module.id.ModuleId;
@@ -47,13 +51,10 @@ import org.apache.ivy.plugins.resolver.packager.PackagerResolver;
 import org.apache.ivy.plugins.version.ChainVersionMatcher;
 import org.apache.ivy.plugins.version.MockVersionMatcher;
 import org.apache.ivy.plugins.version.VersionMatcher;
-
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-import static org.junit.Assert.*;
-
 /**
  * TODO write javadoc
  */