diff --git a/test/acceptance/server.js b/test/acceptance/server.js
index d8bd3448..23ab46f9 100644
--- a/test/acceptance/server.js
+++ b/test/acceptance/server.js
@@ -226,5 +226,22 @@ suite('server', function() {
         }, function() { done(); });
     });
 
+    test("get'ing a tile with data from private table should fail when unauthenticated (uses old redis key)", function(done){
+        var sql = querystring.stringify({
+          sql: "SELECT * FROM test_table_private_1",
+          cache_buster:3,
+          // 1235 is written in rails:users:vizzuality:map_key SET
+          // See https://github.com/Vizzuality/Windshaft-cartodb/issues/39
+          map_key: 1235
+        });
+        assert.response(server, {
+            headers: {host: 'vizzuality.localhost.lan'},
+            url: '/tiles/gadm4/6/31/24.png?' + sql,
+            method: 'GET'
+        },{
+            status: 500,
+        }, function() { done(); });
+    });
+
 });