--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-connect-unspecified.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,60 @@
+/* Copyright libuv project contributors. All rights reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to
+* deal in the Software without restriction, including without limitation the
+* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+* sell copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+* IN THE SOFTWARE.
+*/
+
+#include "uv.h"
+#include "task.h"
+
+static void connect_cb(uv_connect_t* req, int status) {
+  ASSERT_NE(status, UV_EADDRNOTAVAIL);
+}
+
+TEST_IMPL(connect_unspecified) {
+  uv_loop_t* loop;
+  uv_tcp_t socket4;
+  struct sockaddr_in addr4;
+  uv_connect_t connect4;
+  uv_tcp_t socket6;
+  struct sockaddr_in6 addr6;
+  uv_connect_t connect6;
+
+  loop = uv_default_loop();
+
+  ASSERT_OK(uv_tcp_init(loop, &socket4));
+  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr4));
+  ASSERT_OK(uv_tcp_connect(&connect4,
+                           &socket4,
+                           (const struct sockaddr*) &addr4,
+                           connect_cb));
+
+  if (can_ipv6()) {
+    ASSERT_OK(uv_tcp_init(loop, &socket6));
+    ASSERT_OK(uv_ip6_addr("::", TEST_PORT, &addr6));
+    ASSERT_OK(uv_tcp_connect(&connect6,
+                             &socket6,
+                             (const struct sockaddr*) &addr6,
+                             connect_cb));
+  }
+
+  ASSERT_OK(uv_run(loop, UV_RUN_DEFAULT));
+
+  MAKE_VALGRIND_HAPPY(loop);
+  return 0;
+}