diff --git a/test/resolv/test_dns.rb b/test/resolv/test_dns.rb
index 03d997d5b9..9b79fdf9d0 100644
--- a/test/resolv/test_dns.rb
+++ b/test/resolv/test_dns.rb
@@ -382,7 +382,7 @@ class TestResolvDNS < Test::Unit::TestCase
       _, server_port, _, server_address = u.addr
       begin
         client_thread = Thread.new {
-          Resolv::DNS.open(:nameserver_port => [[server_address, server_port]], :search => ['bad1.com', 'bad2.com', 'good.com'], ndots: 5) {|dns|
+          Resolv::DNS.open(:nameserver_port => [[server_address, server_port]], :search => ['bad1.com', 'bad2.com', 'good.com'], ndots: 5, use_ipv6: false) {|dns|
             dns.getaddress("example")
           }
         }