diff --git a/deps/uv/config-unix.mk b/deps/uv/config-unix.mk
index 1352682778..73c9827a74 100644
--- a/deps/uv/config-unix.mk
+++ b/deps/uv/config-unix.mk
@@ -21,7 +21,7 @@
 CC = $(PREFIX)gcc
 AR = $(PREFIX)ar
 E=
-CSTDFLAG=--std=c89 -pedantic
+CSTDFLAG=--std=c89 -pedantic -Wall -Wextra -Wno-unused-parameter
 CFLAGS=-g
 CPPFLAGS += -Isrc/ev
 LINKFLAGS=-lm
diff --git a/deps/uv/include/ev.h b/deps/uv/include/ev.h
index 526b9f1bcb..1db1e26649 100644
--- a/deps/uv/include/ev.h
+++ b/deps/uv/include/ev.h
@@ -48,6 +48,12 @@
 
 EV_CPP(extern "C" {)
 
+#ifdef __GNUC__
+# define EV_MAYBE_UNUSED __attribute__ ((unused))
+#else
+# define EV_MAYBE_UNUSED
+#endif
+
 /*****************************************************************************/
 
 /* pre-4.0 compatibility */
@@ -539,7 +545,7 @@ void ev_set_syserr_cb (void (*cb)(const char *msg));
 struct ev_loop *ev_default_loop (unsigned int flags EV_CPP (= 0));
 
 EV_INLINE struct ev_loop *
-ev_default_loop_uc_ (void)
+EV_MAYBE_UNUSED ev_default_loop_uc_ (void)
 {
   extern struct ev_loop *ev_default_loop_ptr;
 
@@ -547,7 +553,7 @@ ev_default_loop_uc_ (void)
 }
 
 EV_INLINE int
-ev_is_default_loop (EV_P)
+EV_MAYBE_UNUSED ev_is_default_loop (EV_P)
 {
   return EV_A == EV_DEFAULT_UC;
 }
@@ -807,14 +813,14 @@ void ev_async_send     (EV_P_ ev_async *w);
   #define EVUNLOOP_ONE    EVBREAK_ONE
   #define EVUNLOOP_ALL    EVBREAK_ALL
   #if EV_PROTOTYPES
-    EV_INLINE void ev_loop   (EV_P_ int flags) { ev_run   (EV_A_ flags); }
-    EV_INLINE void ev_unloop (EV_P_ int how  ) { ev_break (EV_A_ how  ); }
-    EV_INLINE void ev_default_destroy (void) { ev_loop_destroy (EV_DEFAULT); }
-    EV_INLINE void ev_default_fork    (void) { ev_loop_fork    (EV_DEFAULT); }
+    EV_INLINE void EV_MAYBE_UNUSED ev_loop   (EV_P_ int flags) { ev_run   (EV_A_ flags); }
+    EV_INLINE void EV_MAYBE_UNUSED ev_unloop (EV_P_ int how  ) { ev_break (EV_A_ how  ); }
+    EV_INLINE void EV_MAYBE_UNUSED ev_default_destroy (void) { ev_loop_destroy (EV_DEFAULT); }
+    EV_INLINE void EV_MAYBE_UNUSED ev_default_fork    (void) { ev_loop_fork    (EV_DEFAULT); }
     #if EV_FEATURE_API
-      EV_INLINE unsigned int ev_loop_count  (EV_P) { return ev_iteration  (EV_A); }
-      EV_INLINE unsigned int ev_loop_depth  (EV_P) { return ev_depth      (EV_A); }
-      EV_INLINE void         ev_loop_verify (EV_P) {        ev_verify     (EV_A); }
+      EV_INLINE unsigned int EV_MAYBE_UNUSED ev_loop_count  (EV_P) { return ev_iteration  (EV_A); }
+      EV_INLINE unsigned int EV_MAYBE_UNUSED ev_loop_depth  (EV_P) { return ev_depth      (EV_A); }
+      EV_INLINE void         EV_MAYBE_UNUSED ev_loop_verify (EV_P) {        ev_verify     (EV_A); }
     #endif
   #endif
 #else
diff --git a/deps/uv/src/uv-unix.c b/deps/uv/src/uv-unix.c
index 52ce5b2c9b..be52582f74 100644
--- a/deps/uv/src/uv-unix.c
+++ b/deps/uv/src/uv-unix.c
@@ -704,7 +704,7 @@ static uv_write_t* uv__write(uv_stream_t* stream) {
 
       assert(req->write_index < req->bufcnt);
 
-      if (n < len) {
+      if ((size_t)n < len) {
         buf->base += n;
         buf->len -= n;
         stream->write_queue_size -= n;
@@ -717,7 +717,7 @@ static uv_write_t* uv__write(uv_stream_t* stream) {
         /* Finished writing the buf at index req->write_index. */
         req->write_index++;
 
-        assert(n >= len);
+        assert((size_t)n >= len);
         n -= len;
 
         assert(stream->write_queue_size >= len);
@@ -1788,29 +1788,40 @@ int uv_pipe_init(uv_pipe_t* handle) {
 
 int uv_pipe_bind(uv_pipe_t* handle, const char* name) {
   struct sockaddr_un sun;
+  const char* pipe_fname;
   int saved_errno;
   int sockfd;
   int status;
   int bound;
 
   saved_errno = errno;
+  pipe_fname = NULL;
   sockfd = -1;
   status = -1;
   bound = 0;
 
+  /* Already bound? */
+  if (handle->fd >= 0) {
+    uv_err_new_artificial((uv_handle_t*)handle, UV_EINVAL);
+    goto out;
+  }
+
   /* Make a copy of the file name, it outlives this function's scope. */
-  if ((name = (const char*)strdup(name)) == NULL) {
+  if ((pipe_fname = strdup(name)) == NULL) {
     uv_err_new((uv_handle_t*)handle, ENOMEM);
     goto out;
   }
 
+  /* We've got a copy, don't touch the original any more. */
+  name = NULL;
+
   if ((sockfd = uv__socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
     uv_err_new((uv_handle_t*)handle, errno);
     goto out;
   }
 
   memset(&sun, 0, sizeof sun);
-  uv__strlcpy(sun.sun_path, name, sizeof(sun.sun_path));
+  uv__strlcpy(sun.sun_path, pipe_fname, sizeof(sun.sun_path));
   sun.sun_family = AF_UNIX;
 
   if (bind(sockfd, (struct sockaddr*)&sun, sizeof sun) == -1) {
@@ -1820,16 +1831,17 @@ int uv_pipe_bind(uv_pipe_t* handle, const char* name) {
      * on EADDRINUSE. Unlinking and trying to bind again opens
      * a window for races with other threads and processes.
      */
-    uv_err_new((uv_handle_t*)handle, errno);
+    uv_err_new((uv_handle_t*)handle, (errno == ENOENT) ? EACCES : errno);
     goto out;
 #else
     /*
      * Try to re-purpose the socket. This is a potential race window.
      */
     if (errno != EADDRINUSE
-        || unlink(name) == -1
+        || unlink(pipe_fname) == -1
         || bind(sockfd, (struct sockaddr*)&sun, sizeof sun) == -1) {
-      uv_err_new((uv_handle_t*)handle, errno);
+      /* Convert ENOENT to EACCES for compatibility with Windows. */
+      uv_err_new((uv_handle_t*)handle, (errno == ENOENT) ? EACCES : errno);
       goto out;
     }
 #endif
@@ -1837,7 +1849,7 @@ int uv_pipe_bind(uv_pipe_t* handle, const char* name) {
   bound = 1;
 
   /* Success. */
-  handle->pipe_fname = name; /* Is a strdup'ed copy. */
+  handle->pipe_fname = pipe_fname; /* Is a strdup'ed copy. */
   handle->fd = sockfd;
   status = 0;
 
@@ -1846,10 +1858,11 @@ out:
   if (status) {
     if (bound) {
       /* unlink() before close() to avoid races. */
-      unlink(name);
+      assert(pipe_fname != NULL);
+      unlink(pipe_fname);
     }
     uv__close(sockfd);
-    free((void*)name);
+    free((void*)pipe_fname);
   }
 
   errno = saved_errno;
@@ -1862,6 +1875,13 @@ int uv_pipe_listen(uv_pipe_t* handle, uv_connection_cb cb) {
   int status;
 
   saved_errno = errno;
+  status = -1;
+
+  if (handle->fd == -1) {
+    uv_err_new_artificial((uv_handle_t*)handle, UV_ENOTCONN);
+    goto out;
+  }
+  assert(handle->fd >= 0);
 
   if ((status = listen(handle->fd, SOMAXCONN)) == -1) {
     uv_err_new((uv_handle_t*)handle, errno);
@@ -1871,6 +1891,7 @@ int uv_pipe_listen(uv_pipe_t* handle, uv_connection_cb cb) {
     ev_io_start(EV_DEFAULT_ &handle->read_watcher);
   }
 
+out:
   errno = saved_errno;
   return status;
 }
diff --git a/deps/uv/src/win/pipe.c b/deps/uv/src/win/pipe.c
index 048183083c..fe47b393c6 100644
--- a/deps/uv/src/win/pipe.c
+++ b/deps/uv/src/win/pipe.c
@@ -152,7 +152,7 @@ int uv_pipe_bind(uv_pipe_t* handle, const char* name) {
       handle->error = LOOP->last_error;
       handle->flags |= UV_HANDLE_BIND_ERROR;
     } else if (errno == ERROR_PATH_NOT_FOUND || errno == ERROR_INVALID_NAME) {
-      uv_set_error(UV_EADDRNOTAVAIL, errno);
+      uv_set_error(UV_EACCESS, errno);
     } else {
       uv_set_sys_error(errno);
     }
@@ -399,7 +399,6 @@ int uv_pipe_accept(uv_pipe_t* server, uv_pipe_t* client) {
   }
 
   /* Initialize the client handle and copy the pipeHandle to the client */
-  uv_pipe_init(client);
   uv_connection_init((uv_stream_t*) client);
   client->handle = req->pipeHandle;
 
diff --git a/deps/uv/test/runner.c b/deps/uv/test/runner.c
index e50b69a8a6..4838004663 100644
--- a/deps/uv/test/runner.c
+++ b/deps/uv/test/runner.c
@@ -88,6 +88,13 @@ int run_test(const char* test, int timeout, int benchmark_output) {
   status = 255;
   process_count = 0;
 
+  /* If it's a helper the user asks for, start it directly. */
+  for (task = TASKS; task->main; task++) {
+    if (task->is_helper && strcmp(test, task->process_name) == 0) {
+      return task->main();
+    }
+  }
+
   /* Start the helpers first. */
   for (task = TASKS; task->main; task++) {
     if (strcmp(test, task->task_name) != 0) {
diff --git a/deps/uv/test/test-pipe-bind-error.c b/deps/uv/test/test-pipe-bind-error.c
index f38e39e700..6faccbe202 100644
--- a/deps/uv/test/test-pipe-bind-error.c
+++ b/deps/uv/test/test-pipe-bind-error.c
@@ -28,8 +28,7 @@
 #ifdef _WIN32
 # define BAD_PIPENAME "bad-pipe"
 #else
-/* TODO: define a bad pipe name for unix (see pipe_bind_error_addrnotavail) */
-# define BAD_PIPENAME ""
+# define BAD_PIPENAME "/path/to/unix/socket/that/really/should/not/be/there"
 #endif
 
 
@@ -89,7 +88,7 @@ TEST_IMPL(pipe_bind_error_addrnotavail) {
   r = uv_pipe_bind(&server, BAD_PIPENAME);
 
   ASSERT(r == -1);
-  ASSERT(uv_last_error().code == UV_EADDRNOTAVAIL);
+  ASSERT(uv_last_error().code == UV_EACCESS);
 
   uv_close((uv_handle_t*)&server, close_cb);