diff --git a/packages/runtime-tests/integration/composables/use-animation.test.tsx b/packages/runtime-tests/integration/composables/use-animation.test.tsx
index b0ec4c2..070a8ff 100644
--- a/packages/runtime-tests/integration/composables/use-animation.test.tsx
+++ b/packages/runtime-tests/integration/composables/use-animation.test.tsx
@@ -3,7 +3,7 @@ import { defineComponent, nextTick, shallowRef, watchEffect } from "vue";
 import type { ShallowRef } from "vue";
 import { describe, expect, test } from "vite-plus/test";
 import { render } from "@vue-tui/testing";
-import { Text, useAnimation, createApp } from "@vue-tui/runtime";
+import { Text, useAnimation, createApp, renderToString } from "@vue-tui/runtime";
 
 const delay = (ms: number) => new Promise<void>((r) => setTimeout(r, ms));
 
@@ -968,4 +968,13 @@ describe("useAnimation", () => {
 
     unmount();
   });
+
+  test("renderToString renders frame 0 without throwing or leaking timers", () => {
+    const App = defineComponent(() => {
+      const { frame } = useAnimation({ interval: 50 });
+      return () => <Text>{`frame:${frame.value}`}</Text>;
+    });
+    const output = renderToString(App);
+    expect(output).toContain("frame:0");
+  });
 });
diff --git a/packages/runtime/src/render-to-string.ts b/packages/runtime/src/render-to-string.ts
index 46fbd6e..1fb0702 100644
--- a/packages/runtime/src/render-to-string.ts
+++ b/packages/runtime/src/render-to-string.ts
@@ -13,10 +13,12 @@ import {
   AppContextKey,
   FocusContextKey,
   StdinContextKey,
+  AnimationSchedulerKey,
   type AppContext,
   type FocusContext,
   type StdinContext,
 } from "./context.ts";
+import { createNoOpAnimationScheduler } from "./animation-scheduler.ts";
 
 export interface RenderToStringOptions {
   /**
@@ -94,6 +96,7 @@ export function renderToString(component: Component, options?: RenderToStringOpt
   app.provide(AppContextKey, appContext);
   app.provide(FocusContextKey, createNoOpFocusContext());
   app.provide(StdinContextKey, createNoOpStdinContext());
+  app.provide(AnimationSchedulerKey, createNoOpAnimationScheduler());
 
   // Capture the first uncaught error so we can re-throw after cleanup.
   // Vue's error handling catches component errors internally; for a