diff --git a/packages/svelte/src/reactivity/url-search-params.test.ts b/packages/svelte/src/reactivity/url-search-params.test.ts
index d93b4b964e..12ab7fbc47 100644
--- a/packages/svelte/src/reactivity/url-search-params.test.ts
+++ b/packages/svelte/src/reactivity/url-search-params.test.ts
@@ -22,6 +22,7 @@ test('URLSearchParams.set', () => {
 	});
 
 	flushSync(() => {
+		// nothing should happen here
 		params.set('a', 'c');
 	});
 
@@ -45,6 +46,7 @@ test('URLSearchParams.append', () => {
 	});
 
 	flushSync(() => {
+		// nothing should happen here
 		params.set('a', 'b');
 	});
 
@@ -72,6 +74,7 @@ test('URLSearchParams.delete', () => {
 	});
 
 	flushSync(() => {
+		// nothing should happen here
 		params.delete('a');
 	});
 
@@ -123,6 +126,7 @@ test('URLSearchParams.getAll', () => {
 			log.push(params.get('a'));
 		});
 		render_effect(() => {
+			// this should only logged once because other changes shouldn't affect this
 			log.push(params.get('c'));
 		});
 		render_effect(() => {
diff --git a/packages/svelte/src/reactivity/url.test.ts b/packages/svelte/src/reactivity/url.test.ts
index da88358f8c..174a767781 100644
--- a/packages/svelte/src/reactivity/url.test.ts
+++ b/packages/svelte/src/reactivity/url.test.ts
@@ -73,3 +73,40 @@ test('url.searchParams', () => {
 
 	cleanup();
 });
+
+test('url.href', () => {
+	const url = new ReactiveURL('https://svelte.dev?foo=bar&t=123');
+	const log: any = [];
+
+	const cleanup = effect_root(() => {
+		render_effect(() => {
+			log.push(url.href);
+		});
+	});
+
+	flushSync(() => {
+		url.search = '?q=kit&foo=baz';
+	});
+
+	flushSync(() => {
+		url.searchParams.append('foo', 'qux');
+	});
+
+	flushSync(() => {
+		url.searchParams.delete('foo');
+	});
+
+	flushSync(() => {
+		url.searchParams.set('love', 'svelte5');
+	});
+
+	assert.deepEqual(log, [
+		'https://svelte.dev/?foo=bar&t=123',
+		'https://svelte.dev/?q=kit&foo=baz',
+		'https://svelte.dev/?q=kit&foo=baz&foo=qux',
+		'https://svelte.dev/?q=kit',
+		'https://svelte.dev/?q=kit&love=svelte5'
+	]);
+
+	cleanup();
+});