diff --git a/test/resolv/test_dns.rb b/test/resolv/test_dns.rb
index da7fa43dbc..8334622410 100644
--- a/test/resolv/test_dns.rb
+++ b/test/resolv/test_dns.rb
@@ -53,9 +53,7 @@ class TestResolvDNS < Test::Unit::TestCase
           }
         }
         server_thread = Thread.new {
-          timeout(5) do
-            msg, (_, client_port, _, client_address) = u.recvfrom(4096)
-          end
+          msg, (_, client_port, _, client_address) = timeout(5) {u.recvfrom(4096)}
           id, word2, qdcount, ancount, nscount, arcount = msg.unpack("nnnnnn")
           qr =     (word2 & 0x8000) >> 15
           opcode = (word2 & 0x7800) >> 11