diff --git a/test/common.rb b/test/common.rb
index 94759627aa..895f2c0e2c 100644
--- a/test/common.rb
+++ b/test/common.rb
@@ -26,6 +26,8 @@ def wait_for_server(host, port)
       $stderr.print "." if $DEBUG
       $stderr.flush
       sleep 0.2
+    ensure
+      socket.close
     end
   end
 end