1 files changed, 8 insertions, 0 deletions
diff --git a/test/socket/test_tcp.rb b/test/socket/test_tcp.rb
index 7328897d1e..a6c332c6c4 100644
--- a/test/socket/test_tcp.rb
+++ b/test/socket/test_tcp.rb
@@ -76,4 +76,12 @@ class TestSocket_TCPSocket < Test::Unit::TestCase
       th.join
     }
   end
+
+  def test_accept_nonblock
+    TCPServer.open("localhost", 0) {|svr|
+      assert_raises(IO::WaitReadable) { svr.accept_nonblock }
+      assert_equal :wait_readable, svr.accept_nonblock(exception: false)
+      assert_raises(IO::WaitReadable) { svr.accept_nonblock(exception: true) }
+    }
+  end
 end if defined?(TCPSocket)