diff --git a/proxy/src/telemetry/control.rs b/proxy/src/telemetry/control.rs
index d27150635..f879bba87 100644
--- a/proxy/src/telemetry/control.rs
+++ b/proxy/src/telemetry/control.rs
@@ -96,7 +96,6 @@ impl Control {
         match self.rx.take() {
             None => Ok(Async::Ready(None)),
             Some(mut rx) => {
-                trace!("recv.poll({:?})", rx);
                 match rx.poll() {
                     Ok(Async::Ready(None)) => Ok(Async::Ready(None)),
                     ev => {
@@ -138,7 +137,6 @@ impl Future for Control {
     type Error = ();
 
     fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
-        trace!("poll");
         loop {
             match try_ready!(self.recv()) {
                 Some(ev) => {
@@ -151,7 +149,7 @@ impl Future for Control {
                     self.metrics_aggregate.record_event(&ev);
                 }
                 None => {
-                    warn!("events finished");
+                    debug!("events finished");
                     return Ok(Async::Ready(()));
                 }
             };
diff --git a/proxy/src/transparency/tcp.rs b/proxy/src/transparency/tcp.rs
index 5f69fc14c..5c87fd59e 100644
--- a/proxy/src/transparency/tcp.rs
+++ b/proxy/src/transparency/tcp.rs
@@ -50,7 +50,7 @@ impl Proxy {
             );
             orig_dst
         } else {
-            debug!(
+            warn!(
                 "tcp accepted, no SO_ORIGINAL_DST to forward: remote={}",
                 srv_ctx.remote,
             );
diff --git a/proxy/tests/discovery.rs b/proxy/tests/discovery.rs
index b5298577b..3948c1208 100644
--- a/proxy/tests/discovery.rs
+++ b/proxy/tests/discovery.rs
@@ -1,3 +1,4 @@
+#![deny(warnings)]
 mod support;
 use self::support::*;
 
diff --git a/proxy/tests/shutdown.rs b/proxy/tests/shutdown.rs
index 7fc726600..e6f034e5f 100644
--- a/proxy/tests/shutdown.rs
+++ b/proxy/tests/shutdown.rs
@@ -1,3 +1,4 @@
+#![deny(warnings)]
 mod support;
 use self::support::*;
 
@@ -158,3 +159,4 @@ fn tcp_waits_for_proxies_to_close() {
     tcp_client.write(msg1);
     assert_eq!(tcp_client.read(), msg2.as_bytes());
 }
+
diff --git a/proxy/tests/support/client.rs b/proxy/tests/support/client.rs
index e5423a1c3..407bb4307 100644
--- a/proxy/tests/support/client.rs
+++ b/proxy/tests/support/client.rs
@@ -112,7 +112,7 @@ enum Run {
 }
 
 fn run(addr: SocketAddr, version: Run) -> (Sender, Running) {
-    let (tx, mut rx) = mpsc::unbounded::<(Request, oneshot::Sender<Result<Response, String>>)>();
+    let (tx, rx) = mpsc::unbounded::<(Request, oneshot::Sender<Result<Response, String>>)>();
     let (running_tx, running_rx) = running();
 
     ::std::thread::Builder::new().name("support client".into()).spawn(move || {
diff --git a/proxy/tests/support/controller.rs b/proxy/tests/support/controller.rs
index cdc8237a5..865394a4c 100644
--- a/proxy/tests/support/controller.rs
+++ b/proxy/tests/support/controller.rs
@@ -9,7 +9,6 @@ use std::sync::{Arc, Mutex};
 
 use conduit_proxy_controller_grpc as pb;
 use self::bytes::BufMut;
-use self::futures::sync::mpsc;
 use self::prost::Message;
 
 pub fn new() -> Controller {
@@ -35,7 +34,7 @@ impl Controller {
         }
     }
 
-    pub fn destination(mut self, dest: &str, addr: SocketAddr) -> Self {
+    pub fn destination(self, dest: &str, addr: SocketAddr) -> Self {
         self.destination_fn(dest, move || Some(destination_update(
             addr,
             HashMap::new(),
@@ -43,7 +42,7 @@ impl Controller {
         )))
     }
 
-    pub fn labeled_destination(mut self, dest: &str, addr: SocketAddr,
+    pub fn labeled_destination(self, dest: &str, addr: SocketAddr,
                                addr_labels: HashMap<String, String>,
                                set_labels:HashMap<String, String>)
                                -> Self
@@ -65,7 +64,7 @@ impl Controller {
     }
 
 
-    pub fn destination_close(mut self, dest: &str) -> Self {
+    pub fn destination_close(self, dest: &str) -> Self {
         self.destination_fn(dest, || None)
     }
 
diff --git a/proxy/tests/support/mod.rs b/proxy/tests/support/mod.rs
index 4cfa9ebb1..48e967cba 100644
--- a/proxy/tests/support/mod.rs
+++ b/proxy/tests/support/mod.rs
@@ -1,4 +1,9 @@
-#![allow(unused)]
+// The support mod is compiled for all the integration tests, which are each
+// compiled as separate crates. Each only uses a subset of this module, which
+// means some of it is unused.
+//
+// Note, lints like `unused_variable` should not be ignored.
+#![allow(dead_code)]
 
 extern crate bytes;
 pub extern crate conduit_proxy_controller_grpc;
@@ -18,8 +23,6 @@ extern crate log;
 pub extern crate env_logger;
 
 use std::net::SocketAddr;
-use std::sync::Arc;
-use std::sync::atomic::{AtomicBool, Ordering};
 pub use std::time::Duration;
 
 use self::bytes::{BigEndian, BytesMut};
diff --git a/proxy/tests/support/proxy.rs b/proxy/tests/support/proxy.rs
index 34b792552..23c8ba4c6 100644
--- a/proxy/tests/support/proxy.rs
+++ b/proxy/tests/support/proxy.rs
@@ -85,7 +85,7 @@ impl Proxy {
         self.run_with_test_env(config::TestEnv::new())
     }
 
-    pub fn run_with_test_env(self, mut env: config::TestEnv) -> Listening {
+    pub fn run_with_test_env(self, env: config::TestEnv) -> Listening {
         run(self, env)
     }
 }
@@ -163,7 +163,7 @@ fn run(proxy: Proxy, mut env: config::TestEnv) -> Listening {
         );
     }
 
-    let mut config = config::Config::try_from(&env).unwrap();
+    let config = config::Config::try_from(&env).unwrap();
 
     let (running_tx, running_rx) = oneshot::channel();
     let (tx, mut rx) = shutdown_signal();
diff --git a/proxy/tests/support/tcp.rs b/proxy/tests/support/tcp.rs
index 6de30d05b..595677876 100644
--- a/proxy/tests/support/tcp.rs
+++ b/proxy/tests/support/tcp.rs
@@ -62,7 +62,7 @@ impl TcpClient {
 }
 
 impl TcpServer {
-    pub fn accept<F, U>(mut self, cb: F) -> Self
+    pub fn accept<F, U>(self, cb: F) -> Self
     where
         F: FnOnce(Vec<u8>) -> U + Send + 'static,
         U: Into<Vec<u8>>,
@@ -122,7 +122,7 @@ impl TcpConn {
 
 fn run_client(addr: SocketAddr) -> TcpSender {
     let (tx, rx) = mpsc::unbounded();
-    ::std::thread::Builder::new().name("support client".into()).spawn(move || {
+    ::std::thread::Builder::new().name("support tcp client".into()).spawn(move || {
         let mut core = Core::new().unwrap();
         let handle = core.handle();
 
@@ -186,7 +186,7 @@ fn run_server(tcp: TcpServer) -> server::Listening {
     let (addr_tx, addr_rx) = oneshot::channel();
     let conn_count = Arc::new(AtomicUsize::from(0));
     let srv_conn_count = Arc::clone(&conn_count);
-    ::std::thread::Builder::new().name("support server".into()).spawn(move || {
+    ::std::thread::Builder::new().name("support tcp server".into()).spawn(move || {
         let mut core = Core::new().unwrap();
         let reactor = core.handle();
 
@@ -198,17 +198,21 @@ fn run_server(tcp: TcpServer) -> server::Listening {
 
         let mut accepts = tcp.accepts;
 
-        let work = bind.incoming().for_each(move |(sock, _)| {
-            let cb = accepts.pop_front().expect("no more accepts");
-            srv_conn_count.fetch_add(1, Ordering::Release);
+        let listen = bind
+            .incoming()
+            .for_each(move |(sock, _)| {
+                let cb = accepts.pop_front().expect("no more accepts");
+                srv_conn_count.fetch_add(1, Ordering::Release);
 
-            let fut = cb.call_box(sock);
+                let fut = cb.call_box(sock);
 
-            reactor.spawn(fut);
-            Ok(())
-        });
+                reactor.spawn(fut);
+                Ok(())
+            })
+            .map_err(|e| panic!("tcp accept error: {}", e));
 
-        core.run(work).unwrap();
+        core.handle().spawn(listen);
+        core.run(rx).unwrap();
     }).unwrap();
 
     let addr = addr_rx.wait().expect("addr");
diff --git a/proxy/tests/telemetry.rs b/proxy/tests/telemetry.rs
index 4d0902ce3..2d4294b2c 100644
--- a/proxy/tests/telemetry.rs
+++ b/proxy/tests/telemetry.rs
@@ -1,3 +1,4 @@
+#![deny(warnings)]
 #[macro_use]
 extern crate log;
 
diff --git a/proxy/tests/transparency.rs b/proxy/tests/transparency.rs
index 30af33966..461a95adc 100644
--- a/proxy/tests/transparency.rs
+++ b/proxy/tests/transparency.rs
@@ -1,3 +1,4 @@
+#![deny(warnings)]
 mod support;
 use self::support::*;