--- a/devtools/client/framework/test/sjs_code_bundle_reload_map.sjs
+++ b/devtools/client/framework/test/sjs_code_bundle_reload_map.sjs
@@ -8,17 +8,17 @@
 
 function handleRequest(request, response) {
   response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
   response.setHeader("Pragma", "no-cache");
   response.setHeader("Expires", "0");
   response.setHeader("Access-Control-Allow-Origin", "*", false);
 
   // Redirect to a different file each time.
-  let counter = 1 + +getState("counter");
+  let counter = 1 + (+getState("counter") % 2);
 
   let index = request.path.lastIndexOf("/");
   let newPath = request.path.substr(0, index + 1) +
       "code_bundle_reload_" + counter + ".js.map";
   let newUrl = request.scheme + "://" + request.host + newPath;
 
   response.setStatusLine(request.httpVersion, 302, "Found");
   response.setHeader("Location", newUrl);

--- a/devtools/client/framework/test/sjs_code_reload.sjs
+++ b/devtools/client/framework/test/sjs_code_reload.sjs
@@ -8,17 +8,17 @@
 
 function handleRequest(request, response) {
   response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
   response.setHeader("Pragma", "no-cache");
   response.setHeader("Expires", "0");
   response.setHeader("Access-Control-Allow-Origin", "*", false);
 
   // Redirect to a different file each time.
-  let counter = 1 + +getState("counter");
+  let counter = 1 + (+getState("counter") % 2);
 
   let index = request.path.lastIndexOf("/");
   let newPath = request.path.substr(0, index + 1) +
       "code_bundle_reload_" + counter + ".js";
   let newUrl = request.scheme + "://" + request.host + newPath;
 
   response.setStatusLine(request.httpVersion, 302, "Found");
   response.setHeader("Location", newUrl);