diff --git a/packages/qwik/src/core/platform/platform.ts b/packages/qwik/src/core/platform/platform.ts
index 05f345da495..a718e861705 100644
--- a/packages/qwik/src/core/platform/platform.ts
+++ b/packages/qwik/src/core/platform/platform.ts
@@ -66,9 +66,9 @@ export const createPlatform = (): CorePlatform => {
  */
 export const toUrl = (doc: Document, containerEl: QwikElement, url: string | URL): URL => {
   const baseURI = new URL(doc.baseURI);
-  const base = containerEl?.getAttribute('q:base') ?? '/';
-  const pathUrl = (base + url).replace(/\/+/g, '/');
-  return new URL(pathUrl, baseURI.origin);
+  const base = new URL(containerEl.getAttribute('q:base') ?? baseURI, baseURI);
+  const pathUrl = (base.pathname + url).replace(/\/+/g, '/');
+  return new URL(pathUrl, base.origin);
 };
 
 let _platform = /*#__PURE__ */ createPlatform();
diff --git a/packages/qwik/src/qwikloader.ts b/packages/qwik/src/qwikloader.ts
index e7257a01f05..b27ddf1e9d6 100644
--- a/packages/qwik/src/qwikloader.ts
+++ b/packages/qwik/src/qwikloader.ts
@@ -73,10 +73,10 @@ export const qwikLoader = (doc: Document, hasInitialized?: number) => {
     if (attrValue) {
       const container = element.closest('[q\\:container]')!;
       const baseURI = new URL(doc.baseURI);
-      const base = container?.getAttribute('q:base') ?? '/';
+      const base = new URL(container.getAttribute('q:base') ?? baseURI, baseURI);
       for (const qrl of attrValue.split('\n')) {
-        const pathUrl = (base + qrl).replace(/\/+/g, '/');
-        const url = new URL(pathUrl, baseURI.origin);
+        const pathUrl = (base.pathname + qrl).replace(/\/+/g, '/');
+        const url = new URL(pathUrl, base.origin);
         const symbolName = url.hash[replace](/^#?([^?[|]*).*$/, '$1') || 'default';
         const reqTime = performance.now();
         let handler: any;
diff --git a/packages/qwik/src/testing/platform.ts b/packages/qwik/src/testing/platform.ts
index 0b61b429558..167179cc2ab 100644
--- a/packages/qwik/src/testing/platform.ts
+++ b/packages/qwik/src/testing/platform.ts
@@ -97,9 +97,9 @@ export function setTestPlatform(_setPlatform: Function) {
  */
 export function toUrl(doc: Document, containerEl: Element, url: string | URL): URL {
   const baseURI = new URL(doc.baseURI);
-  const base = containerEl?.getAttribute('q:base') ?? '/';
-  const pathUrl = (base + url).replace(/\/+/g, '/');
-  return new URL(pathUrl, baseURI.origin);
+  const base = new URL(containerEl.getAttribute('q:base') ?? baseURI, baseURI);
+  const pathUrl = (base.pathname + url).replace(/\/+/g, '/');
+  return new URL(pathUrl, base.origin);
 }
 
 function toPath(url: URL) {