diff --git a/build.xml b/build.xml
index 3b82c868c2..6caac71705 100644
--- a/build.xml
+++ b/build.xml
@@ -1292,20 +1292,29 @@
     <!-- end custom installers -->
 
     <!-- unit tests -->
-    <target name="updateTest" depends="prepupdate">
+    <target name="buildTest">
         <ant dir="core/java/" target="jarTest" />
-        <copy file="core/java/build/i2ptest.jar" todir="pkg-temp/lib" />
-        <zip destfile="i2pupdate.zip" basedir="pkg-temp" />
+        <ant dir="router/java/" target="jarTest" />
+        <copy file="core/java/build/i2ptest.jar" todir="build" />
+        <copy file="router/java/build/routertest.jar" todir="build" />
     </target>
+    <target name="prepTest" depends="prepupdate, buildTest">
+        <!-- overwrite i2p.jar and router.jar with the test versions -->
+        <copy file="build/i2ptest.jar" tofile="pkg-temp/lib/i2p.jar" overwrite="true" />
+        <copy file="build/routertest.jar" tofile="pkg-temp/lib/router.jar" overwrite="true" />
+    </target>
+    <target name="updateTest" depends="prepTest, zipit" />
     <target name="junit.test" depends="buildProperties, jbigi" >
         <ant dir="core/java/" target="junit.test" />
         <ant dir="router/java/" target="junit.test" />
     </target>
     <target name="scalatest.test" depends="buildProperties, jbigi" >
         <ant dir="core/java/" target="scalatest.test" />
+        <!-- note there are no router scala tests yet -->
         <ant dir="router/java/" target="scalatest.test" />
     </target>
     <target name="test" depends="buildProperties, jbigi" >
+        <!-- both junit and scala -->
         <ant dir="core/java/" target="test" />
         <ant dir="router/java/" target="test" />
     </target>
diff --git a/router/java/build.xml b/router/java/build.xml
index f473abf0cb..46ec22e491 100644
--- a/router/java/build.xml
+++ b/router/java/build.xml
@@ -258,7 +258,10 @@
             <fileset dir="../../reports/router/junit/" />
         </replaceregexp>
     </target>
+
+    <!-- both junit and scala, but we have no scala tests yet -->
     <target name="test" depends="junit.test"/>
+
     <!-- test reports -->
     <target name="scalatest.report">
         <junitreport todir="../../reports/router/scalatest">
diff --git a/router/java/src/net/i2p/router/transport/GeoIPv6.java b/router/java/src/net/i2p/router/transport/GeoIPv6.java
index 605bd0f38a..93affec888 100644
--- a/router/java/src/net/i2p/router/transport/GeoIPv6.java
+++ b/router/java/src/net/i2p/router/transport/GeoIPv6.java
@@ -31,6 +31,8 @@ import net.i2p.util.Log;
 /**
  *  Generate compressed geoipv6.dat.gz file, and
  *  lookup entries in it.
+ *
+ *  @since IPv6
  */
 class GeoIPv6 {
 
diff --git a/router/java/src/net/i2p/router/transport/udp/UDPEndpoint.java b/router/java/src/net/i2p/router/transport/udp/UDPEndpoint.java
index 7170a7fcb0..206eaee7bd 100644
--- a/router/java/src/net/i2p/router/transport/udp/UDPEndpoint.java
+++ b/router/java/src/net/i2p/router/transport/udp/UDPEndpoint.java
@@ -1,5 +1,6 @@
 package net.i2p.router.transport.udp;
 
+import java.io.IOException;
 import java.net.DatagramSocket;
 import java.net.InetAddress;
 import java.net.Inet4Address;
@@ -25,6 +26,7 @@ class UDPEndpoint {
     private final boolean _isIPv4, _isIPv6;
     
     /**
+     *  @param transport may be null for unit testing ONLY
      *  @param listenPort -1 or the requested port, may not be honored
      *  @param bindAddress null ok
      */
@@ -49,9 +51,11 @@ class UDPEndpoint {
             throw new SocketException("SSU Unable to bind to a port on " + _bindAddress);
         }
         _sender = new UDPSender(_context, _socket, "UDPSender");
-        _receiver = new UDPReceiver(_context, _transport, _socket, "UDPReceiver");
         _sender.startup();
-        _receiver.startup();
+        if (_transport != null) {
+            _receiver = new UDPReceiver(_context, _transport, _socket, "UDPReceiver");
+            _receiver.startup();
+        }
     }
     
     public synchronized void shutdown() {
@@ -157,6 +161,25 @@ class UDPEndpoint {
     public void send(UDPPacket packet) { 
         _sender.add(packet); 
     }
+     
+    /**
+     * Blocking call to receive the next inbound UDP packet from any peer.
+     *
+     * UNIT TESTING ONLY. Direct from the socket.
+     * In normal operation, UDPReceiver thread injects to PacketHandler queue.
+     *
+     * @return null if we have shut down, or on failure
+     */
+    public UDPPacket receive() { 
+        UDPPacket packet = UDPPacket.acquire(_context, true);
+        try {
+            _socket.receive(packet.getPacket());
+            return packet; 
+        } catch (IOException ioe) {
+            packet.release();
+            return null;
+        }
+    }
     
     /**
      *  Clear outbound queue, probably in preparation for sending destroy() to everybody.
diff --git a/router/java/test/junit/net/i2p/router/transport/udp/UDPEndpointTestStandalone.java b/router/java/test/junit/net/i2p/router/transport/udp/UDPEndpointTestStandalone.java
index 5b9d3de59c..6f83404d55 100644
--- a/router/java/test/junit/net/i2p/router/transport/udp/UDPEndpointTestStandalone.java
+++ b/router/java/test/junit/net/i2p/router/transport/udp/UDPEndpointTestStandalone.java
@@ -38,7 +38,11 @@ public class UDPEndpointTestStandalone {
             _log.debug("Building " + i);
             UDPEndpoint endpoint = new UDPEndpoint(_context, null, base + i, null);
             _endpoints[i] = endpoint;
-            endpoint.startup();
+            try {
+                endpoint.startup();
+            } catch (SocketException se) {
+                throw new RuntimeException(se);
+            }
             I2PThread read = new I2PThread(new TestRead(endpoint), "Test read " + i);
             I2PThread write = new I2PThread(new TestWrite(endpoint), "Test write " + i);
             //read.setDaemon(true);