diff --git a/packages/svelte/tests/runtime-runes/samples/state-onchange-after-mutate/_config.js b/packages/svelte/tests/runtime-runes/samples/state-onchange-after-mutate/_config.js
new file mode 100644
index 0000000000..3985156f03
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/state-onchange-after-mutate/_config.js
@@ -0,0 +1,11 @@
+import { flushSync } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, target, logs }) {
+		const btn = target.querySelector('button');
+
+		flushSync(() => btn?.click());
+		assert.deepEqual(logs, [{ message: 'hello' }, { message: 'goodbye' }]);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/state-onchange-after-mutate/main.svelte b/packages/svelte/tests/runtime-runes/samples/state-onchange-after-mutate/main.svelte
new file mode 100644
index 0000000000..1a1fc40891
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/state-onchange-after-mutate/main.svelte
@@ -0,0 +1,14 @@
+<script>
+	let object = $state(
+		{},
+		{
+			onchange() {
+				console.log($state.snapshot(object));
+			}
+		}
+	);
+
+	object.message = 'hello';
+</script>
+
+<button onclick={() => object.message = 'goodbye'}>goodbye</button>