diff --git a/.changeset/fast-boxes-perform.md b/.changeset/fast-boxes-perform.md
new file mode 100644
index 000000000000..00643b82bed2
--- /dev/null
+++ b/.changeset/fast-boxes-perform.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: include base path in path to start script
diff --git a/packages/kit/src/runtime/server/page/render.js b/packages/kit/src/runtime/server/page/render.js
index 9c911ebb147b..215ca2b3fef6 100644
--- a/packages/kit/src/runtime/server/page/render.js
+++ b/packages/kit/src/runtime/server/page/render.js
@@ -164,7 +164,15 @@ export async function render_response({
 	}
 
 	/** @param {string} path */
-	const prefixed = (path) => (path.startsWith('/') ? path : `${resolved_assets}/${path}`);
+	const prefixed = (path) => {
+		if (path.startsWith('/')) {
+			// Vite makes the start script available through the base path and without it.
+			// We load it via the base path in order to support remote IDE environments which proxy
+			// all URLs under the base path during development.
+			return base + path;
+		}
+		return `${resolved_assets}/${path}`;
+	};
 
 	const serialized = { data: '', form: 'null', error: 'null' };
 
diff --git a/turbo.json b/turbo.json
index e07e1e8cf14a..7a422b757850 100644
--- a/turbo.json
+++ b/turbo.json
@@ -44,7 +44,7 @@
 		},
 		"test": {
 			"dependsOn": ["^build"],
-			"inputs": ["test/**"],
+			"inputs": ["src/**", "scripts/**", "shared/**", "templates/**", "test/**"],
 			"outputs": ["coverage/", "test-results/**"],
 			"outputMode": "new-only",
 			"env": ["CI", "TURBO_CACHE_KEY"]