From 01c278019726d7b01c924dd185e10b79a1f97610 Mon Sep 17 00:00:00 2001
From: Max Schmitt <max@schmitt.mx>
Date: Tue, 26 Oct 2021 10:45:34 +0200
Subject: [PATCH] fix(expect): allow `expect.Matchers` generic with single
 value (#11986)

---
 CHANGELOG.md                 |  2 ++
 packages/expect/src/index.ts |  2 +-
 test-types/expect.test.ts    | 13 +++++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 test-types/expect.test.ts

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c37f53b3699e..6daba1c00e5f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 ### Fixes
 
+- `[expect]` Allow again `expect.Matchers` generic with single value ([#11986](https://github.com/facebook/jest/pull/11986))
+
 ### Chore & Maintenance
 
 ### Performance
diff --git a/packages/expect/src/index.ts b/packages/expect/src/index.ts
index 648074fdba90..75ab9ba9d18d 100644
--- a/packages/expect/src/index.ts
+++ b/packages/expect/src/index.ts
@@ -431,7 +431,7 @@ const expectExport = expect as Expect;
 
 declare namespace expectExport {
   export type MatcherState = JestMatcherState;
-  export interface Matchers<R, T> extends MatcherInterface<R, T> {}
+  export interface Matchers<R, T = unknown> extends MatcherInterface<R, T> {}
 }
 
 export = expectExport;
diff --git a/test-types/expect.test.ts b/test-types/expect.test.ts
new file mode 100644
index 000000000000..1ff227af29e2
--- /dev/null
+++ b/test-types/expect.test.ts
@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import type * as expect from 'expect';
+
+export type M = expect.Matchers<void, unknown>;
+export type N = expect.Matchers<void>;
+// @ts-expect-error
+export type E = expect.Matchers<>;