diff --git a/test/benchmark-pump.c b/test/benchmark-pump.c
index 8685258e..7d3977df 100644
--- a/test/benchmark-pump.c
+++ b/test/benchmark-pump.c
@@ -390,6 +390,7 @@ HELPER_IMPL(tcp_pump_server) {
   r = uv_listen((uv_stream_t*)&tcpServer, MAX_WRITE_HANDLES, connection_cb);
   ASSERT(r == 0);
 
+  notify_parent_process();
   uv_run(loop, UV_RUN_DEFAULT);
 
   return 0;
@@ -411,6 +412,7 @@ HELPER_IMPL(pipe_pump_server) {
   r = uv_listen((uv_stream_t*)&pipeServer, MAX_WRITE_HANDLES, connection_cb);
   ASSERT(r == 0);
 
+  notify_parent_process();
   uv_run(loop, UV_RUN_DEFAULT);
 
   MAKE_VALGRIND_HAPPY();
diff --git a/test/blackhole-server.c b/test/blackhole-server.c
index ad878b35..9b21d1e0 100644
--- a/test/blackhole-server.c
+++ b/test/blackhole-server.c
@@ -114,6 +114,7 @@ HELPER_IMPL(tcp4_blackhole_server) {
   r = uv_listen((uv_stream_t*)&tcp_server, 128, connection_cb);
   ASSERT(r == 0);
 
+  notify_parent_process();
   r = uv_run(loop, UV_RUN_DEFAULT);
   ASSERT(0 && "Blackhole server dropped out of event loop.");