diff --git a/build.xml b/build.xml
index 2c6b4141..99974868 100644
--- a/build.xml
+++ b/build.xml
@@ -180,6 +180,10 @@
         <arg value="test/envjs-call-load-test.js"/>
         <jvmarg value="-Dfile.encoding=utf-8"/>
       </java>
+      <java fork="true" jar="${RHINO_JAR}" failonerror="true">
+        <arg value="test/prototype.js"/>
+        <jvmarg value="-Dfile.encoding=utf-8"/>
+      </java>
     </target>
     
     </project>
diff --git a/test/prototype.js b/test/prototype.js
new file mode 100644
index 00000000..ad7fa2f1
--- /dev/null
+++ b/test/prototype.js
@@ -0,0 +1,19 @@
+whichJarFile = "rhino"
+whichInterpreter = whichJarFile + " interpreter jar";
+multiwindow = false;
+load("dist/env.rhino.js");
+load("test/qunit.js");
+
+window.addEventListener("load",function(){
+  print("\n\nTesting with " + whichInterpreter);
+  print("Handling onload for test.js");
+  print("Loading tests.");
+
+  load("test/unit/prototypecompat.js");
+
+  print("Load complete. Running tests.");
+});
+
+window.location = "test/index.html";
+
+Envjs.wait(0);
\ No newline at end of file