diff --git a/build.xml b/build.xml
index 3d5becc1b..be5d9410b 100644
--- a/build.xml
+++ b/build.xml
@@ -8,6 +8,8 @@
 
   <property name="ant.jar" value="${ant.home}/lib/ant.jar" />
   <property name="crimson.jar" value="${ant.home}/lib/crimson.jar" />
+  <property name="xerces.jar" value="${ant.home}/lib/xercesImpl.jar" />
+  <property name="xml-apis.jar" value="${ant.home}/lib/xml-apis.jar" />
   <property name="antlr.jar" value="lib/antlr.jar" />
   <property name="velocity.jar" value="lib/velocity-dep-1.4.jar" />
   <property name="jdom.jar" value="lib/jdom-b9.jar" />
@@ -62,6 +64,8 @@
   <path id="tests.runpath">
     <pathelement location="target/tests" />
     <pathelement path="${clover.lib}/clover.jar"/>
+    <pathelement path="${xerces.jar}"/>
+    <pathelement path="${xml-apis.jar}"/>
     <path refid="tests.buildpath" />
   </path>