diff --git a/test/test-multi-poll.c b/test/test-multi-poll.c
new file mode 100644
index 0000000..2cf7046
--- /dev/null
+++ b/test/test-multi-poll.c
@@ -0,0 +1,124 @@
+#include <assert.h>
+#include <process.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "epoll.h"
+#include "init.h"
+#include "util.h"
+#include "win.h"
+
+#include <WS2tcpip.h>
+
+#define POLL_THREAD_COUNT 20
+#define LISTEN_PORT 12345
+
+static SOCKET create_socket(unsigned short port) {
+  SOCKET sock;
+  struct sockaddr_in address;
+  unsigned long one;
+  int r;
+
+  sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+  assert(sock > 0);
+
+  address.sin_family = AF_INET;
+  address.sin_port = htons(port);
+  address.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+  r = bind(sock, (struct sockaddr*) &address, sizeof address);
+  assert(r == 0);
+
+  one = 1;
+  r = ioctlsocket(sock, FIONBIO, &one);
+  assert(r == 0);
+
+  return sock;
+}
+
+static void send_message(SOCKET sock, unsigned short port) {
+  char hello[] = "hello";
+  struct sockaddr_in address;
+  WSABUF buf;
+  DWORD bytes_sent;
+  int r;
+
+  address.sin_family = AF_INET;
+  address.sin_port = htons(port);
+  address.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+  buf.buf = hello;
+  buf.len = sizeof(hello);
+
+  r = WSASendTo(sock,
+                &buf,
+                1,
+                &bytes_sent,
+                0,
+                (struct sockaddr*) &address,
+                sizeof address,
+                NULL,
+                NULL);
+  assert(r >= 0);
+}
+
+static unsigned int __stdcall poll_thread(void* arg) {
+  epoll_t epfd;
+  SOCKET sock;
+  struct epoll_event ev_in;
+  struct epoll_event ev_out;
+  int r;
+
+  sock = (SOCKET) arg;
+
+  epfd = epoll_create();
+  assert(epfd != NULL);
+
+  ev_in.events = EPOLLIN;
+  ev_in.data.u64 = 42;
+  r = epoll_ctl(epfd, EPOLL_CTL_ADD, sock, &ev_in);
+  assert(r == 0);
+
+  memset(&ev_out, 0, sizeof ev_out);
+  r = epoll_wait(epfd, &ev_out, 1, -1);
+  assert(r == 1);
+
+  assert(ev_out.data.u64 == ev_in.data.u64);
+  assert(ev_out.events == ev_in.events);
+
+  puts("Got event.");
+
+  r = epoll_close(epfd);
+  assert(r == 0);
+
+  return 0;
+}
+
+int main(void) {
+  HANDLE threads[POLL_THREAD_COUNT];
+
+  int r = init();
+  assert(r == 0);
+
+  SOCKET send_sock = create_socket(0);
+  SOCKET recv_sock = create_socket(LISTEN_PORT);
+
+  for (size_t i = 0; i < array_count(threads); i++) {
+    HANDLE thread = (HANDLE) _beginthreadex(
+        NULL, 0, poll_thread, (void*) recv_sock, 0, NULL);
+    assert(thread != INVALID_HANDLE_VALUE);
+    threads[i] = thread;
+  }
+
+  Sleep(500);
+
+  send_message(send_sock, LISTEN_PORT);
+
+  for (size_t i = 0; i < array_count(threads); i++) {
+    HANDLE thread = threads[i];
+    DWORD wr = WaitForSingleObject(thread, INFINITE);
+    assert(wr == WAIT_OBJECT_0);
+    CloseHandle(thread);
+  }
+
+  return 0;
+}