diff --git a/rar/src/plugin-test/project.xml b/rar/src/plugin-test/project.xml
index 3361e073..b5e7d5ae 100644
--- a/rar/src/plugin-test/project.xml
+++ b/rar/src/plugin-test/project.xml
@@ -16,7 +16,8 @@
  * limitations under the License.
  */
  -->
-<project>
+<project xmlns="http://maven.apache.org/POM/3.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/3.0.0
+http://maven.apache.org/maven-v3_0_0.xsd">
   <pomVersion>3</pomVersion>
   <name>Test project for Maven Rar Plugin</name>
   <id>test-maven-rar-plugin</id>
@@ -46,7 +47,9 @@
       <id>djencks</id>
       <email>djencks at apache.org</email>
       <organization>none</organization>
-      <role>Java Developer</role>
+      <roles>
+        <role>Java Developer</role>
+      </roles>
     </developer>
   </developers>
   <dependencies>