diff --git a/packages/svelte/tests/runtime-runes/samples/async-waterfall-on-init/_config.js b/packages/svelte/tests/runtime-runes/samples/async-waterfall-on-init/_config.js
new file mode 100644
index 0000000000..91c388e0ca
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-waterfall-on-init/_config.js
@@ -0,0 +1,50 @@
+import { flushSync, tick } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	html: `
+		<button>resolve 1</button>
+		<button>resolve 2</button>
+		<hr>
+		<p>pending</p>
+	`,
+
+	async test({ assert, target }) {
+		const [button1, button2] = target.querySelectorAll('button');
+
+		flushSync(() => button1.click());
+		await Promise.resolve();
+		await Promise.resolve();
+		await Promise.resolve();
+		await tick();
+		flushSync();
+
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>resolve 1</button>
+				<button>resolve 2</button>
+				<hr>
+				<p>pending</p>
+			`
+		);
+
+		flushSync(() => button2.click());
+		await Promise.resolve();
+		await Promise.resolve();
+		await Promise.resolve();
+		await tick();
+		flushSync();
+
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>resolve 1</button>
+				<button>resolve 2</button>
+				<hr>
+				<button>0</button>
+				<p>true</p>
+			`
+		);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/async-waterfall-on-init/main.svelte b/packages/svelte/tests/runtime-runes/samples/async-waterfall-on-init/main.svelte
new file mode 100644
index 0000000000..86af9bb07e
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-waterfall-on-init/main.svelte
@@ -0,0 +1,22 @@
+<script>
+	let d1 = Promise.withResolvers();
+	let d2 = Promise.withResolvers();
+
+	let count = $state(0);
+</script>
+
+<button onclick={() => d1.resolve(true)}>resolve 1</button>
+<button onclick={() => d2.resolve(true)}>resolve 2</button>
+
+<hr>
+
+<svelte:boundary>
+	{#if await d1.promise}
+		<button onclick={() => count += 1}>{count}</button>
+		<p>{await d2.promise}</p>
+	{/if}
+
+	{#snippet pending()}
+		<p>pending</p>
+	{/snippet}
+</svelte:boundary>