--- a/devtools/client/responsive.html/test/browser/browser.ini
+++ b/devtools/client/responsive.html/test/browser/browser.ini
@@ -1,9 +1,9 @@
 [DEFAULT]
 tags = devtools
 subsuite = devtools
 support-files =
-  browser_devices.json
+  devices.json
   head.js
 
 [browser_exit_button.js]
 [browser_viewport_basics.js]

deleted file mode 100644
--- a/devtools/client/responsive.html/test/browser/browser_devices.json
+++ /dev/null
@@ -1,25 +0,0 @@
-{
-  "TYPES": [ "phones" ],
-  "phones": [
-    {
-      "name": "Firefox OS Flame",
-      "width": 320,
-      "height": 570,
-      "pixelRatio": 1.5,
-      "userAgent": "Mozilla/5.0 (Mobile; rv:39.0) Gecko/39.0 Firefox/39.0",
-      "touch": true,
-      "firefoxOS": true,
-      "os": "fxos"
-    },
-    {
-      "name": "Alcatel One Touch Fire",
-      "width": 320,
-      "height": 480,
-      "pixelRatio": 1,
-      "userAgent": "Mozilla/5.0 (Mobile; ALCATELOneTouch4012X; rv:28.0) Gecko/28.0 Firefox/28.0",
-      "touch": true,
-      "firefoxOS": true,
-      "os": "fxos"
-    },
-  ],
-}

new file mode 100644
--- /dev/null
+++ b/devtools/client/responsive.html/test/browser/devices.json
@@ -0,0 +1,25 @@
+{
+  "TYPES": [ "phones" ],
+  "phones": [
+    {
+      "name": "Firefox OS Flame",
+      "width": 320,
+      "height": 570,
+      "pixelRatio": 1.5,
+      "userAgent": "Mozilla/5.0 (Mobile; rv:39.0) Gecko/39.0 Firefox/39.0",
+      "touch": true,
+      "firefoxOS": true,
+      "os": "fxos"
+    },
+    {
+      "name": "Alcatel One Touch Fire",
+      "width": 320,
+      "height": 480,
+      "pixelRatio": 1,
+      "userAgent": "Mozilla/5.0 (Mobile; ALCATELOneTouch4012X; rv:28.0) Gecko/28.0 Firefox/28.0",
+      "touch": true,
+      "firefoxOS": true,
+      "os": "fxos"
+    }
+  ]
+}

--- a/devtools/client/responsive.html/test/browser/head.js
+++ b/devtools/client/responsive.html/test/browser/head.js
@@ -13,17 +13,17 @@ Services.scriptloader.loadSubScript(
 Services.scriptloader.loadSubScript(
   "chrome://mochitests/content/browser/devtools/client/framework/test/shared-redux-head.js",
   this);
 
 const TEST_URI_ROOT = "http://example.com/browser/devtools/client/responsive.html/test/browser/";
 
 DevToolsUtils.testing = true;
 Services.prefs.setCharPref("devtools.devices.url",
-  TEST_URI_ROOT + "browser_devices.json");
+  TEST_URI_ROOT + "devices.json");
 Services.prefs.setBoolPref("devtools.responsive.html.enabled", true);
 
 registerCleanupFunction(() => {
   DevToolsUtils.testing = false;
   Services.prefs.clearUserPref("devtools.devices.url");
   Services.prefs.clearUserPref("devtools.responsive.html.enabled");
 });
 const { ResponsiveUIManager } = Cu.import("resource://devtools/client/responsivedesign/responsivedesign.jsm", {});