diff --git a/t/unused.t b/t/unused.t
index 740549c..4d4a8ed 100644
--- a/t/unused.t
+++ b/t/unused.t
@@ -76,6 +76,9 @@ hello
 
 
 === TEST 3: module used (multiple http {} blocks)
+This test case won't run with nginx 1.9.3+ since duplicate http {} blocks
+have been prohibited since then.
+--- SKIP
 --- config
     location /foo {
         srcache_store PUT /store;