diff --git a/packages/expect/src/jest-extend.ts b/packages/expect/src/jest-extend.ts
index fba626bcefb4..fee75069895e 100644
--- a/packages/expect/src/jest-extend.ts
+++ b/packages/expect/src/jest-extend.ts
@@ -33,6 +33,8 @@ function getMatcherState(assertion: Chai.AssertionStatic & Chai.Assertion, expec
 
   const matcherState: MatcherState = {
     ...getState(expect),
+    // TODO: implement via expect.addEqualityTesters
+    customTesters: [],
     isNot,
     utils: jestUtils,
     promise,
diff --git a/packages/expect/src/types.ts b/packages/expect/src/types.ts
index f77183dad743..4a05a086454a 100644
--- a/packages/expect/src/types.ts
+++ b/packages/expect/src/types.ts
@@ -28,6 +28,7 @@ export interface MatcherHintOptions {
 }
 
 export interface MatcherState {
+  customTesters: Array<Tester>
   assertionCalls: number
   currentTestName?: string
   dontThrow?: () => void