diff --git a/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte b/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte
index d1b6452df4..4fc7c4ec38 100644
--- a/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte
@@ -14,6 +14,7 @@
 
 	class Foo<T> {
 		public name: string;
+		declare bar: string;
 		x = 'x' as const;
 		constructor(name: string) {
 			this.name = name;