diff --git a/runtime/src/main/java/org/capnproto/TwoPartyVatNetwork.java b/runtime/src/main/java/org/capnproto/TwoPartyVatNetwork.java
index f5be461..b823afb 100644
--- a/runtime/src/main/java/org/capnproto/TwoPartyVatNetwork.java
+++ b/runtime/src/main/java/org/capnproto/TwoPartyVatNetwork.java
@@ -9,7 +9,6 @@ public class TwoPartyVatNetwork
                    VatNetwork.Connection {
 
     public interface MessageTap {
-        void outgoing(OutgoingRpcMessage message, RpcTwoPartyProtocol.Side side);
         void incoming(IncomingRpcMessage message, RpcTwoPartyProtocol.Side side);
     }
 
diff --git a/runtime/src/test/java/org/capnproto/TwoPartyTest.java b/runtime/src/test/java/org/capnproto/TwoPartyTest.java
index 8cd52a6..c57250c 100644
--- a/runtime/src/test/java/org/capnproto/TwoPartyTest.java
+++ b/runtime/src/test/java/org/capnproto/TwoPartyTest.java
@@ -46,14 +46,6 @@ class Tap implements TwoPartyVatNetwork.MessageTap {
 
     final RpcDumper dumper = new RpcDumper();
 
-    @Override
-    public void outgoing(OutgoingRpcMessage message, RpcTwoPartyProtocol.Side side) {
-        var text = this.dumper.dump(message.getBody().asReader().getAs(RpcProtocol.Message.factory), side);
-        if (text.length() > 0) {
-            System.out.println(text);
-        }
-    }
-
     @Override
     public void incoming(IncomingRpcMessage message, RpcTwoPartyProtocol.Side side) {
         var text = this.dumper.dump(message.getBody().getAs(RpcProtocol.Message.factory), side);