diff --git a/packages/svelte/src/main/main-client.js b/packages/svelte/src/main/main-client.js
index 6bae64893c..df0d984a17 100644
--- a/packages/svelte/src/main/main-client.js
+++ b/packages/svelte/src/main/main-client.js
@@ -1,12 +1,9 @@
 import {
 	current_component_context,
-	destroy_signal,
 	get_or_init_context_map,
 	is_ssr,
-	managed_effect,
 	untrack,
 	user_effect,
-	flush_local_render_effects,
 	pre_effect,
 	get
 } from '../internal/client/runtime.js';
@@ -158,36 +155,6 @@ export function createEventDispatcher() {
 	};
 }
 
-/** @param {import('../internal/client/types.js').ComponentContext} context */
-function init_update_callbacks(context) {
-	/** @type {NonNullable<import('../internal/client/types.js').ComponentContext['u']>} */
-	const update_callbacks = {
-		b: [],
-		a: []
-	};
-
-	function observe_all() {
-		for (const signal of context.d) get(signal);
-
-		const props = get_descriptors(context.s);
-		for (const descriptor of Object.values(props)) {
-			if (descriptor.get) descriptor.get();
-		}
-	}
-
-	pre_effect(() => {
-		observe_all();
-		update_callbacks.b.forEach(run);
-	});
-
-	user_effect(() => {
-		observe_all();
-		update_callbacks.a.forEach(run);
-	});
-
-	return update_callbacks;
-}
-
 // TODO mark beforeUpdate and afterUpdate as deprecated in Svelte 6
 
 /**
diff --git a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/_config.js b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/_config.js
index 4050d2ef03..18de78158b 100644
--- a/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/_config.js
+++ b/packages/svelte/tests/runtime-legacy/samples/lifecycle-render-afterUpdate2/_config.js
@@ -3,6 +3,11 @@ import { log } from './log.js';
 import { test, ok } from '../../test';
 
 export default test({
+	// somewhat troublingly, there's no way to make beforeUpdate/afterUpdate
+	// behave as no-ops while testing SSR
+	skip_if_ssr: true,
+	skip_if_hydrate: true,
+
 	before_test: () => {
 		log.length = 0;
 	},