diff --git a/fit/src/test/java/org/apache/olingo/fit/proxy/v4/EntityUpdateTestITCase.java b/fit/src/test/java/org/apache/olingo/fit/proxy/v4/EntityUpdateTestITCase.java
index cd00901ce..a4a613197 100644
--- a/fit/src/test/java/org/apache/olingo/fit/proxy/v4/EntityUpdateTestITCase.java
+++ b/fit/src/test/java/org/apache/olingo/fit/proxy/v4/EntityUpdateTestITCase.java
@@ -18,6 +18,10 @@
  */
 package org.apache.olingo.fit.proxy.v4;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
 import java.lang.reflect.Proxy;
 import java.math.BigDecimal;
 import org.apache.commons.lang3.StringUtils;
@@ -29,9 +33,6 @@ import org.apache.olingo.fit.proxy.v4.staticservice.microsoft.test.odata.service
 import org.apache.olingo.fit.proxy.v4.staticservice.microsoft.test.odata.services.odatawcfservice.types.OrderDetail;
 import org.apache.olingo.fit.proxy.v4.staticservice.microsoft.test.odata.services.odatawcfservice.types.OrderDetailKey;
 import org.apache.olingo.fit.proxy.v4.staticservice.microsoft.test.odata.services.odatawcfservice.types.Person;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
 import org.junit.Test;
 
 /**
diff --git a/pom.xml b/pom.xml
index 23e6460a1..1eeb19605 100644
--- a/pom.xml
+++ b/pom.xml
@@ -448,8 +448,8 @@
                 <exclude>**/nb-configuration.xml</exclude>
                 <exclude>**/.externalToolBuilders/**</exclude>
                 <exclude>**/maven-eclipse.xml</exclude>
-                <exclude>**/checkstyle-*</exclude>
-                <exclude>**/.plxarc</exclude>
+                <exclude>**/ref/**</exclude>
+                <exclude>**/server-ref/**</exclude>
               </excludes>
             </configuration>
           </execution>