diff --git a/packages/svelte/tests/runtime-legacy/shared.ts b/packages/svelte/tests/runtime-legacy/shared.ts
index 3a9ab67731..e69cb390bc 100644
--- a/packages/svelte/tests/runtime-legacy/shared.ts
+++ b/packages/svelte/tests/runtime-legacy/shared.ts
@@ -406,7 +406,7 @@ async function run_test_variant(
 			const run_hydratables_init = () => {
 				if (variant !== 'hydrate') return;
 				const script = [...document.head.querySelectorAll('script').values()].find((script) =>
-					script.textContent.includes('(window.__svelte ??= {}).h')
+					script.textContent?.includes('(window.__svelte ??= {}).h')
 				)?.textContent;
 				if (!script) return;
 				(0, eval)(script);