Ensure the IPv6 stack is operational before running this test (other tests

use the startup of the IPv6 test server as a substitute check for this).

tests/data/test1085

@@ -30,6 +30,11 @@ HTTP-IPv6 GET with invalid --interface
  <command>
 -g "http://%HOST6IP:%HTTP6PORT/1085" --interface non-existing-host.haxx.se.
 </command>
+# Ensure the IPv6 stack is operational before running this test (other tests
+# use the startup of the IPv6 test server as a substitute check for this).
+<precheck>
+./server/resolve --ipv6 ::1
+</precheck>
 </client>
 
 #