diff --git a/build.xml b/build.xml
index b38d2f6ea..f9bc78a8e 100644
--- a/build.xml
+++ b/build.xml
@@ -603,6 +603,7 @@
             <classpath>
                 <path refid="external.dependencies" />
                 <pathelement location="${java.classes}"/>
+                <pathelement location="${java.contracts}"/>
                 <pathelement location="lib/testng-5.14.1.jar"/>
             </classpath>
 <!--