diff --git a/test/resolv/test_dns.rb b/test/resolv/test_dns.rb
index 133dbab6cf8ad6..f9224fbebe9fa4 100644
--- a/test/resolv/test_dns.rb
+++ b/test/resolv/test_dns.rb
@@ -758,7 +758,7 @@ def test_multiple_servers_with_timeout_and_truncated_tcp_fallback
           u1.send(msg[0...512], 0, client_address, client_port)
         end
 
-        tcp_server1_thread = Thread.new { t1.accept }
+        tcp_server1_thread = Thread.new { t1.accept; t1.close }
 
         tcp_server2_thread = Thread.new do
           ct = t2.accept