diff --git a/packages/svelte/tests/runtime-legacy/shared.ts b/packages/svelte/tests/runtime-legacy/shared.ts
index 7f3673f867..a129fb9b31 100644
--- a/packages/svelte/tests/runtime-legacy/shared.ts
+++ b/packages/svelte/tests/runtime-legacy/shared.ts
@@ -423,6 +423,12 @@ async function run_test_variant(
 			try {
 				if (config.test) {
 					flushSync();
+
+					if (variant === 'hydrate') {
+						// wait for pending boundaries to render
+						await Promise.resolve();
+					}
+
 					await config.test({
 						// @ts-expect-error TS doesn't get it
 						assert: {
diff --git a/packages/svelte/tests/runtime-runes/samples/async-abort-signal/_config.js b/packages/svelte/tests/runtime-runes/samples/async-abort-signal/_config.js
index 560a239790..b721f4dd62 100644
--- a/packages/svelte/tests/runtime-runes/samples/async-abort-signal/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/async-abort-signal/_config.js
@@ -1,12 +1,8 @@
-import { settled } from 'svelte';
+import { settled, tick } from 'svelte';
 import { test } from '../../test';
 
 export default test({
 	async test({ assert, target, logs, variant }) {
-		if (variant === 'hydrate') {
-			await Promise.resolve();
-		}
-
 		const [reset, resolve] = target.querySelectorAll('button');
 
 		reset.click();
@@ -14,12 +10,7 @@ export default test({
 		assert.deepEqual(logs, ['aborted']);
 
 		resolve.click();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
+		await tick();
 		assert.htmlEqual(
 			target.innerHTML,
 			`
diff --git a/packages/svelte/tests/runtime-runes/samples/async-attribute/_config.js b/packages/svelte/tests/runtime-runes/samples/async-attribute/_config.js
index 35ee7606e7..0a64738409 100644
--- a/packages/svelte/tests/runtime-runes/samples/async-attribute/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/async-attribute/_config.js
@@ -1,4 +1,4 @@
-import { flushSync, tick } from 'svelte';
+import { tick } from 'svelte';
 import { ok, test } from '../../test';
 
 export default test({
@@ -12,22 +12,17 @@ export default test({
 	async test({ assert, target }) {
 		const [cool, neat, reset] = target.querySelectorAll('button');
 
-		flushSync(() => cool.click());
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
+		cool.click();
 		await tick();
-		flushSync();
 
 		const p = target.querySelector('p');
 		ok(p);
 		assert.htmlEqual(p.outerHTML, '<p class="cool">hello</p>');
 
-		flushSync(() => reset.click());
+		reset.click();
 		assert.htmlEqual(p.outerHTML, '<p class="cool">hello</p>');
 
-		flushSync(() => neat.click());
-		await Promise.resolve();
+		neat.click();
 		await tick();
 		assert.htmlEqual(p.outerHTML, '<p class="neat">hello</p>');
 	}
diff --git a/packages/svelte/tests/runtime-runes/samples/async-child-effect/_config.js b/packages/svelte/tests/runtime-runes/samples/async-child-effect/_config.js
index 41d4130470..325cb1dcd6 100644
--- a/packages/svelte/tests/runtime-runes/samples/async-child-effect/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/async-child-effect/_config.js
@@ -1,5 +1,5 @@
 import { flushSync, tick } from 'svelte';
-import { ok, test } from '../../test';
+import { test } from '../../test';
 
 export default test({
 	html: `
@@ -7,20 +7,9 @@ export default test({
 		<p>loading</p>
 	`,
 
-	async test({ assert, target, variant }) {
-		if (variant === 'hydrate') {
-			await Promise.resolve();
-		}
-
-		flushSync(() => {
-			target.querySelector('button')?.click();
-		});
-
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
+	async test({ assert, target }) {
+		target.querySelector('button')?.click();
 		await tick();
-		flushSync();
 
 		const [button1, button2] = target.querySelectorAll('button');
 
@@ -37,12 +26,8 @@ export default test({
 		flushSync(() => button2.click());
 		flushSync(() => button2.click());
 
-		flushSync(() => button1.click());
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
+		button1.click();
 		await tick();
-		flushSync();
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -54,12 +39,8 @@ export default test({
 			`
 		);
 
-		flushSync(() => button1.click());
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
+		button1.click();
 		await tick();
-		flushSync();
 
 		assert.htmlEqual(
 			target.innerHTML,
diff --git a/packages/svelte/tests/runtime-runes/samples/async-derived-in-if/_config.js b/packages/svelte/tests/runtime-runes/samples/async-derived-in-if/_config.js
index ab020d85f7..914b311c97 100644
--- a/packages/svelte/tests/runtime-runes/samples/async-derived-in-if/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/async-derived-in-if/_config.js
@@ -1,18 +1,12 @@
-import { flushSync } from 'svelte';
+import { tick } from 'svelte';
 import { test } from '../../test';
 
 export default test({
 	async test({ assert, target }) {
 		const button = target.querySelector('button');
 
-		flushSync(() => button?.click());
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		flushSync();
+		button?.click();
+		await tick();
 
 		assert.htmlEqual(
 			target.innerHTML,
diff --git a/packages/svelte/tests/runtime-runes/samples/async-derived-invalidation-during-init/_config.js b/packages/svelte/tests/runtime-runes/samples/async-derived-invalidation-during-init/_config.js
index df3fbe65cd..fee8e2e6bf 100644
--- a/packages/svelte/tests/runtime-runes/samples/async-derived-invalidation-during-init/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/async-derived-invalidation-during-init/_config.js
@@ -1,4 +1,4 @@
-import { flushSync, tick } from 'svelte';
+import { tick } from 'svelte';
 import { test } from '../../test';
 
 export default test({
@@ -9,29 +9,13 @@ export default test({
 		<p>pending</p>
 	`,
 
-	async test({ assert, target, component, errors, variant }) {
-		if (variant === 'hydrate') {
-			await Promise.resolve();
-		}
-
+	async test({ assert, target, errors }) {
 		const [toggle, resolve1, resolve2] = target.querySelectorAll('button');
 
-		flushSync(() => toggle.click());
-
-		flushSync(() => resolve1.click());
-		await Promise.resolve();
-		await Promise.resolve();
+		toggle.click();
+		resolve1.click();
+		resolve2.click();
 
-		flushSync(() => resolve2.click());
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
 		await tick();
 
 		assert.htmlEqual(
diff --git a/packages/svelte/tests/runtime-runes/samples/async-derived/_config.js b/packages/svelte/tests/runtime-runes/samples/async-derived/_config.js
index d573cf6246..7239643464 100644
--- a/packages/svelte/tests/runtime-runes/samples/async-derived/_config.js
+++ b/packages/svelte/tests/runtime-runes/samples/async-derived/_config.js
@@ -1,4 +1,4 @@
-import { flushSync, tick } from 'svelte';
+import { flushSync, settled, tick } from 'svelte';
 import { ok, test } from '../../test';
 
 export default test({
@@ -14,30 +14,20 @@ export default test({
 		const [resolve_a, resolve_b, reset, increment] = target.querySelectorAll('button');
 
 		flushSync(() => resolve_a.click());
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		await Promise.resolve();
-		flushSync();
+		await tick();
 
 		const p = target.querySelector('p');
 		ok(p);
 		assert.htmlEqual(p.innerHTML, '1a');
 
 		flushSync(() => increment.click());
-		await Promise.resolve();
-		await Promise.resolve();
 		await tick();
 		assert.htmlEqual(p.innerHTML, '2a');
 
-		flushSync(() => reset.click());
+		reset.click();
 		assert.htmlEqual(p.innerHTML, '2a');
 
-		flushSync(() => resolve_b.click());
-		await Promise.resolve();
-		await Promise.resolve();
+		resolve_b.click();
 		await tick();
 		assert.htmlEqual(p.innerHTML, '2b');