diff --git a/tests/app-template/index.html b/tests/app-template/index.html
index 60a4b93e50..d6b8bc411e 100644
--- a/tests/app-template/index.html
+++ b/tests/app-template/index.html
@@ -8,15 +8,15 @@
 
     {{content-for "head"}}
 
-    <link integrity="" rel="stylesheet" href="/@embroider/core/vendor.css">
-    <link integrity="" rel="stylesheet" href="/assets/app-template.css">
+    <link integrity="" rel="stylesheet" href="%BASE_URL%@embroider/core/vendor.css">
+    <link integrity="" rel="stylesheet" href="%BASE_URL%assets/app-template.css">
 
     {{content-for "head-footer"}}
   </head>
   <body>
     {{content-for "body"}}
 
-    <script src="/@embroider/core/vendor.js"></script>
+    <script src="%BASE_URL%@embroider/core/vendor.js"></script>
     <script type="module">
       import Application from './app/app';
       import environment from './app/config/environment';
diff --git a/tests/app-template/tests/index.html b/tests/app-template/tests/index.html
index a9f23697fc..7f46044dfb 100644
--- a/tests/app-template/tests/index.html
+++ b/tests/app-template/tests/index.html
@@ -25,8 +25,8 @@
     </div>
 
     <script src="/testem.js" integrity="" data-embroider-ignore></script>
-    <script src="/@embroider/core/vendor.js"></script>
-    <script src="/@embroider/core/test-support.js"></script>
+    <script src="%BASE_URL%/@embroider/core/vendor.js"></script>
+    <script src="%BASE_URL%/@embroider/core/test-support.js"></script>
     <script type="module">import "ember-testing";</script>
 
     <script type="module">
diff --git a/tests/ts-app-template/index.html b/tests/ts-app-template/index.html
index 3c632d832b..e4772ea147 100644
--- a/tests/ts-app-template/index.html
+++ b/tests/ts-app-template/index.html
@@ -8,15 +8,15 @@
 
     {{content-for "head"}}
 
-    <link integrity="" rel="stylesheet" href="/@embroider/core/vendor.css">
-    <link integrity="" rel="stylesheet" href="/assets/ts-app-template.css">
+    <link integrity="" rel="stylesheet" href="%BASE_URL%@embroider/core/vendor.css">
+    <link integrity="" rel="stylesheet" href="%BASE_URL%assets/ts-app-template.css">
 
     {{content-for "head-footer"}}
   </head>
   <body>
     {{content-for "body"}}
 
-    <script src="/@embroider/core/vendor.js"></script>
+    <script src="%BASE_URL%@embroider/core/vendor.js"></script>
     <script type="module">
       import Application from './app/app.ts';
       import environment from './app/config/environment';
