diff --git a/packages/tui/src/app.tsx b/packages/tui/src/app.tsx
index 0a9036e15e..b675ade175 100644
--- a/packages/tui/src/app.tsx
+++ b/packages/tui/src/app.tsx
@@ -177,33 +177,35 @@ function isVersionGreater(left: string, right: string) {
   return a.prerelease.localeCompare(b.prerelease, undefined, { numeric: true }) > 0
 }
 
+export function initializeRenderer(config: TuiConfig.Resolved, factory = createCliRenderer) {
+  return Effect.tryPromise({
+    try: () =>
+      factory({
+        externalOutputMode: "passthrough",
+        targetFps: 60,
+        gatherStats: false,
+        exitOnCtrlC: false,
+        useKittyKeyboard: {},
+        autoFocus: false,
+        openConsoleOnError: false,
+        useMouse: !Flag.OPENCODE_DISABLE_MOUSE && config.mouse,
+        consoleOptions: {
+          keyBindings: [{ name: "y", ctrl: true, action: "copy-selection" }],
+        },
+      }),
+    catch: (error) => (error instanceof Error ? error : new Error(String(error))),
+  })
+}
+
 export const run = Effect.fn("Tui.run")(function* (input: TuiInput) {
   const global = yield* Global.Service
   const exit = { epilogue: undefined as string | undefined, reason: undefined as unknown }
   const result = yield* Effect.scoped(
     Effect.gen(function* () {
-      const renderer = yield* Effect.acquireRelease(
-        Effect.tryPromise({
-          try: () =>
-            createCliRenderer({
-              externalOutputMode: "passthrough",
-              targetFps: 60,
-              gatherStats: false,
-              exitOnCtrlC: false,
-              useKittyKeyboard: {},
-              autoFocus: false,
-              openConsoleOnError: false,
-              useMouse: !Flag.OPENCODE_DISABLE_MOUSE && input.config.mouse,
-              consoleOptions: {
-                keyBindings: [{ name: "y", ctrl: true, action: "copy-selection" }],
-              },
-            }),
-          catch: (error) => (error instanceof Error ? error : new Error(String(error))),
+      const renderer = yield* Effect.acquireRelease(initializeRenderer(input.config), (renderer) =>
+        Effect.sync(() => {
+          destroyRenderer(renderer)
         }),
-        (renderer) =>
-          Effect.sync(() => {
-            destroyRenderer(renderer)
-          }),
       )
       win32DisableProcessedInput()
       const keymap = createDefaultOpenTuiKeymap(renderer)
diff --git a/packages/tui/test/app-lifecycle.test.tsx b/packages/tui/test/app-lifecycle.test.tsx
index 559af1e29e..9ac6b21015 100644
--- a/packages/tui/test/app-lifecycle.test.tsx
+++ b/packages/tui/test/app-lifecycle.test.tsx
@@ -7,34 +7,15 @@ import { createTuiResolvedConfig } from "./fixture/tui-runtime"
 import { createEventSource, createFetch, directory, json } from "./fixture/tui-sdk"
 
 test("renderer initialization preserves the original error message", async () => {
-  const core = await import("@opentui/core")
   const message = 'Failed to open library "opentui.dll": error code 126'
-  mock.module("@opentui/core", () => ({
-    ...core,
-    createCliRenderer: async () => {
-      throw new Error(message)
-    },
-  }))
-
-  try {
-    const { run } = await import("../src/app")
-    await expect(
-      Effect.runPromise(
-        run({
-          url: "http://test",
-          directory,
-          config: createTuiResolvedConfig({ plugin_enabled: {} }),
-          args: {},
-          pluginHost: {
-            async start() {},
-            async dispose() {},
-          },
-        }).pipe(Effect.provide(Global.defaultLayer)),
-      ),
-    ).rejects.toThrow(message)
-  } finally {
-    mock.restore()
+  const { initializeRenderer } = await import("../src/app")
+  const factory = async () => {
+    throw new Error(message)
   }
+
+  await expect(
+    Effect.runPromise(initializeRenderer(createTuiResolvedConfig({ plugin_enabled: {} }), factory)),
+  ).rejects.toThrow(message)
 })
 
 test("SIGHUP clears title and disposes scoped resources once", async () => {