3 files changed, 17 insertions, 0 deletions
diff --git a/test/socket/test_nonblock.rb b/test/socket/test_nonblock.rb
index 882e438deb..94ed198616 100644
--- a/test/socket/test_nonblock.rb
+++ b/test/socket/test_nonblock.rb
@@ -13,6 +13,8 @@ class TestSocketNonblock < Test::Unit::TestCase
     serv.bind(Socket.sockaddr_in(0, "127.0.0.1"))
     serv.listen(5)
     assert_raise(IO::WaitReadable) { serv.accept_nonblock }
+    assert_equal :wait_readable, serv.accept_nonblock(exception: false)
+    assert_raise(IO::WaitReadable) { serv.accept_nonblock(exception: true) }
     c = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
     c.connect(serv.getsockname)
     begin
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)
diff --git a/test/socket/test_unix.rb b/test/socket/test_unix.rb
index 866c83906e..829eaa90a2 100644
--- a/test/socket/test_unix.rb
+++ b/test/socket/test_unix.rb
@@ -663,4 +663,11 @@ class TestSocket_UNIXSocket < Test::Unit::TestCase
     assert(s0.closed?)
   end
 
+  def test_accept_nonblock
+    bound_unix_socket(UNIXServer) {|serv, path|
+      assert_raises(IO::WaitReadable) { serv.accept_nonblock }
+      assert_raises(IO::WaitReadable) { serv.accept_nonblock(exception: true) }
+      assert_equal :wait_readable, serv.accept_nonblock(exception: false)
+    }
+  end
 end if defined?(UNIXSocket) && /cygwin/ !~ RUBY_PLATFORM