diff --git a/src/setup.js b/src/setup.js
index 04177a3..d963825 100644
--- a/src/setup.js
+++ b/src/setup.js
@@ -37,9 +37,8 @@ export function setup() {
 /**
  * Auto initialization.
  */
-/* c8 ignore next 18 */
 export function init() {
   setup();
-  sampleRUM.collectBaseURL = window.origin;
+  sampleRUM.collectBaseURL = new URL(`${window.hlx.codeBasePath}/`, window.origin);
   sampleRUM();
 }
diff --git a/test/setup/setup.test.html b/test/setup/setup.test.html
index 586a720..cf88291 100644
--- a/test/setup/setup.test.html
+++ b/test/setup/setup.test.html
@@ -8,7 +8,8 @@
       /* eslint-env mocha */
       import { runTests } from '@web/test-runner-mocha';
       import { expect } from '@esm-bundle/chai';
-      import { setup } from '../../src/setup.js';
+      import { sampleRUM } from '@adobe/helix-rum-js';
+      import { setup, init } from '../../src/setup.js';
 
       runTests(() => {
         it('setup - defines window.hlx', () => {
@@ -33,6 +34,11 @@
           expect(window.hlx.codeBasePath).to.be.equal('/some/path');
           expect(window.hlx.lighthouse).to.be.false;
         });
+
+        it('init - sets sampleRUM.collectBaseURL to include the codeBasePath', () => {
+          init();
+          expect(sampleRUM.collectBaseURL.href).to.be.equal(`${window.origin}/some/path/`);
+        });
       });
     </script>
   </body>