diff --git a/test/screenshotter/ss_data.js b/test/screenshotter/ss_data.js
index 829f15949..479b29e0a 100644
--- a/test/screenshotter/ss_data.js
+++ b/test/screenshotter/ss_data.js
@@ -11,6 +11,7 @@ var fs = require("fs");
 var jsyaml = require("js-yaml");
 var querystring = require("querystring");
 
+var queryKeys = ["tex", "pre", "post", "display"];
 var dict = fs.readFileSync(require.resolve("./ss_data.yaml"));
 dict = jsyaml.safeLoad(dict);
 for (var key in dict) {
@@ -18,6 +19,12 @@ for (var key in dict) {
     if (typeof itm === "string") {
         itm = dict[key] = { tex: itm };
     }
-    itm.query = querystring.stringify(itm);
+    var query = {};
+    queryKeys.forEach(function(key) {
+        if (itm.hasOwnProperty(key)) {
+            query[key] = itm[key];
+        }
+    });
+    itm.query = querystring.stringify(query);
 }
 module.exports = dict;