From 9fb5014dec48cca827464e8700010a06142b7e17 Mon Sep 17 00:00:00 2001
From: Sebastian Markbage <sema@fb.com>
Date: Mon, 30 Nov 2020 22:41:37 -0500
Subject: [PATCH] Use timers instead of act to force fallbacks to show

---
 .../src/__tests__/ReactLazy-test.internal.js               | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/packages/react-reconciler/src/__tests__/ReactLazy-test.internal.js b/packages/react-reconciler/src/__tests__/ReactLazy-test.internal.js
index 23d333ab8ba24..b7f1570823c14 100644
--- a/packages/react-reconciler/src/__tests__/ReactLazy-test.internal.js
+++ b/packages/react-reconciler/src/__tests__/ReactLazy-test.internal.js
@@ -1344,10 +1344,9 @@ describe('ReactLazy', () => {
     expect(root).toMatchRenderedOutput('AB');
 
     // Swap the position of A and B
-    ReactTestRenderer.act(() => {
-      root.update(<Parent swap={true} />);
-      expect(Scheduler).toFlushAndYield(['Init B2', 'Loading...']);
-    });
+    root.update(<Parent swap={true} />);
+    expect(Scheduler).toFlushAndYield(['Init B2', 'Loading...']);
+    jest.runAllTimers();
 
     // The suspense boundary should've triggered now.
     expect(root).toMatchRenderedOutput('Loading...');