diff --git a/test/javascripts/admin/controllers/admin-customize-themes-show-test.js.es6 b/test/javascripts/admin/controllers/admin-customize-themes-show-test.js.es6
index 3e9c0f90060..63a9453e36d 100644
--- a/test/javascripts/admin/controllers/admin-customize-themes-show-test.js.es6
+++ b/test/javascripts/admin/controllers/admin-customize-themes-show-test.js.es6
@@ -8,18 +8,16 @@ moduleFor("controller:admin-customize-themes-show", {
   needs: ["controller:adminUser"]
 });
 
-const repoUrl = "https://github.com/discourse/discourse-brand-header.git";
-const remoteTheme = Theme.create({
-  id: 2,
-  default: true,
-  name: "default",
-  remote_theme: {
-    remote_url: repoUrl
-  }
-});
-
 QUnit.test("can display source url for remote themes", function(assert) {
-  delete remoteTheme["remote_theme"]["branch"];
+  const repoUrl = "https://github.com/discourse/discourse-brand-header.git";
+  const remoteTheme = Theme.create({
+    id: 2,
+    default: true,
+    name: "default",
+    remote_theme: {
+      remote_url: repoUrl
+    }
+  });
   const controller = this.subject({
     model: remoteTheme
   });
@@ -34,17 +32,22 @@ QUnit.test("can display source url for remote themes", function(assert) {
 QUnit.test("can display source url for remote theme branches", function(
   assert
 ) {
-  const branchUrl =
-    "https://github.com/discourse/discourse-brand-header/tree/beta";
-  remoteTheme["remote_theme"]["branch"] = "beta";
-
+  const remoteTheme = Theme.create({
+    id: 2,
+    default: true,
+    name: "default",
+    remote_theme: {
+      remote_url: "https://github.com/discourse/discourse-brand-header.git",
+      branch: "beta"
+    }
+  });
   const controller = this.subject({
     model: remoteTheme
   });
 
   assert.deepEqual(
     controller.get("remoteThemeLink"),
-    branchUrl,
+    "https://github.com/discourse/discourse-brand-header/tree/beta",
     "returns theme's repo URL to branch"
   );
 });