diff --git a/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ReferenceListenerTest.java b/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ReferenceListenerTest.java
index 28ab2c2..c398569 100644
--- a/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ReferenceListenerTest.java
+++ b/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ReferenceListenerTest.java
@@ -16,25 +16,24 @@
 
 package org.onosproject.yangutils.parser.impl.listeners;
 
+import java.io.IOException;
+import java.util.ListIterator;
+
 import org.junit.Rule;
 import org.junit.Test;
-
 import org.junit.rules.ExpectedException;
+import org.onosproject.yangutils.datamodel.YangContainer;
+import org.onosproject.yangutils.datamodel.YangDataTypes;
 import org.onosproject.yangutils.datamodel.YangLeaf;
+import org.onosproject.yangutils.datamodel.YangLeafList;
+import org.onosproject.yangutils.datamodel.YangList;
 import org.onosproject.yangutils.datamodel.YangModule;
 import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.datamodel.YangNodeType;
-import org.onosproject.yangutils.datamodel.YangDataTypes;
 import org.onosproject.yangutils.datamodel.YangStatusType;
-import org.onosproject.yangutils.datamodel.YangContainer;
-import org.onosproject.yangutils.datamodel.YangList;
-import org.onosproject.yangutils.datamodel.YangLeafList;
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
 
-import java.io.IOException;
-import java.util.ListIterator;
-
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.core.Is.is;
 
@@ -66,8 +65,8 @@
         YangModule yangNode = (YangModule) node;
         assertThat(yangNode.getName(), is("Test"));
 
-        ListIterator<YangLeaf<?>> leafIterator = yangNode.getListOfLeaf().listIterator();
-        YangLeaf<?> leafInfo = leafIterator.next();
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
 
         // Check whether the reference is set correctly.
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
@@ -174,8 +173,8 @@
         assertThat(container.getReference(), is("\"container reference\""));
 
         // Check whether leaf properties as set correctly.
-        ListIterator<YangLeaf<?>> leafIterator = container.getListOfLeaf().listIterator();
-        YangLeaf<?> leafInfo = leafIterator.next();
+        ListIterator<YangLeaf> leafIterator = container.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
         assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
@@ -211,8 +210,8 @@
         assertThat(yangList.getReference(), is("\"list reference\""));
 
         // Check whether leaf properties as set correctly.
-        ListIterator<YangLeaf<?>> leafIterator = yangList.getListOfLeaf().listIterator();
-        YangLeaf<?> leafInfo = leafIterator.next();
+        ListIterator<YangLeaf> leafIterator = yangList.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
         assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
@@ -242,8 +241,8 @@
         YangModule yangNode = (YangModule) node;
         assertThat(yangNode.getName(), is("Test"));
 
-        ListIterator<YangLeafList<?>> leafListIterator = yangNode.getListOfLeafList().listIterator();
-        YangLeafList<?> leafListInfo = leafListIterator.next();
+        ListIterator<YangLeafList> leafListIterator = yangNode.getListOfLeafList().listIterator();
+        YangLeafList leafListInfo = leafListIterator.next();
 
         // Check whether description value is set correctly.
         assertThat(leafListInfo.getLeafName(), is("invalid-interval"));