mobxjs · kubk · Mar 12, 2026 · Mar 12, 2026 · Mar 12, 2026 · Mar 12, 2026
diff --git a/jest.config.js b/jest.config.js
@@ -1,6 +1,5 @@
-const buildConfig = require("./jest.base.config")
-
-module.exports = buildConfig(__dirname, {
+module.exports = {
+    coverageDirectory: "<rootDir>/coverage/",
+    coverageReporters: ["lcov", "text"],
     projects: ["<rootDir>/packages/*/jest.config.js", "<rootDir>/packages/*/jest.config-*.js"]
-    // collectCoverageFrom: ["<rootDir>/packages/*/src/**/*.{ts,tsx}"]
-})
+}
diff --git a/package.json b/package.json
@@ -5,7 +5,7 @@
         "packages/*"
     ],
     "resolutions": {
-        "jest": "^29.5.0",
+        "jest": "^30.3.0",
         "typescript": "^5.9.2",
         "recast": "^0.23.1"
     },
@@ -36,7 +36,7 @@
         "@testing-library/dom": "^10.4.0",
         "@testing-library/jest-dom": "^5.16.4",
         "@testing-library/react": "^16.1.0",
-        "@types/jest": "^26.0.15",
+        "@types/jest": "^30.0.0",
         "@types/node": "18",
         "@types/prop-types": "^15.5.2",
         "@types/react": "^18.0.0",
@@ -50,8 +50,8 @@
         "husky": "^4.2.5",
         "import-size": "^1.0.2",
         "iterall": "^1.3.0",
-        "jest": "^29.5.0",
-        "jest-environment-jsdom": "^29.5.0",
+        "jest": "^30.3.0",
+        "jest-environment-jsdom": "^30.3.0",
         "jest-mock-console": "^1.0.1",
         "lerna": "^3.22.1",
         "lint-staged": "^10.1.7",
@@ -66,7 +66,7 @@
         "react-test-renderer": "^18.0.0",
         "serializr": "^2.0.3",
         "tape": "^5.0.1",
-        "ts-jest": "^29.0.5",
+        "ts-jest": "^29.4.6",
         "tsdx": "^0.14.1",
         "typescript": "^5.9.2"
     },

diff --git a/packages/mobx-react-lite/__tests__/__snapshots__/observer.test.tsx.snap b/packages/mobx-react-lite/__tests__/__snapshots__/observer.test.tsx.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`changing state in render should fail 1`] = `
 <div>

diff --git a/packages/mobx-react-lite/__tests__/__snapshots__/printDebugValue.test.ts.snap b/packages/mobx-react-lite/__tests__/__snapshots__/printDebugValue.test.ts.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`printDebugValue 1`] = `
 {

diff --git a/...es/mobx-react-lite/__tests__/__snapshots__/useAsObservableSource.deprecated.test.tsx.snap b/...es/mobx-react-lite/__tests__/__snapshots__/useAsObservableSource.deprecated.test.tsx.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`base useAsObservableSource should work with <Observer> 1`] = `
 [MockFunction] {

diff --git a/packages/mobx-react-lite/__tests__/__snapshots__/useLocalStore.deprecated.test.tsx.snap b/packages/mobx-react-lite/__tests__/__snapshots__/useLocalStore.deprecated.test.tsx.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`base useLocalStore should work 1`] = `
 [MockFunction] {

diff --git a/packages/mobx-react-lite/__tests__/enforceActions.test.tsx b/packages/mobx-react-lite/__tests__/enforceActions.test.tsx
@@ -31,7 +31,7 @@ describe("enforcing actions", () => {
         })
 
         render(<Parent />)
-        expect(consoleWarnMock).not.toBeCalled()
+        expect(consoleWarnMock).not.toHaveBeenCalled()
     })
 
     it("'observed' should work", () => {
@@ -50,7 +50,7 @@ describe("enforcing actions", () => {
         })
 
         render(<Parent />)
-        expect(consoleWarnMock).toBeCalledTimes(1)
+        expect(consoleWarnMock).toHaveBeenCalledTimes(1)
     })
 
     it("'always' should work", () => {
@@ -69,6 +69,6 @@ describe("enforcing actions", () => {
         })
 
         render(<Parent />)
-        expect(consoleWarnMock).toBeCalledTimes(1)
+        expect(consoleWarnMock).toHaveBeenCalledTimes(1)
     })
 })
diff --git a/packages/mobx-react-lite/__tests__/observer.test.tsx b/packages/mobx-react-lite/__tests__/observer.test.tsx
@@ -996,32 +996,32 @@ it("dependencies should not become temporarily unobserved", async () => {
 
     expect(computed).toBe(1)
     expect(renders).toBe(1)
-    expect(doubleDisposed).toBeCalledTimes(0)
+    expect(doubleDisposed).toHaveBeenCalledTimes(0)
 
     store.inc()
     expect(computed).toBe(2) // change propagated
     expect(renders).toBe(1) // but not yet rendered
-    expect(doubleDisposed).toBeCalledTimes(0) // if we dispose to early, this fails!
+    expect(doubleDisposed).toHaveBeenCalledTimes(0) // if we dispose to early, this fails!
 
     // Bug: change the state, before the useEffect fires, can cause the reaction to be disposed
     mobx.reaction(() => store.x, reactionFired)
-    expect(reactionFired).toBeCalledTimes(0)
+    expect(reactionFired).toHaveBeenCalledTimes(0)
     expect(computed).toBe(2) // Not 3!
     expect(renders).toBe(1)
-    expect(doubleDisposed).toBeCalledTimes(0)
+    expect(doubleDisposed).toHaveBeenCalledTimes(0)
 
     await runEffects()
-    expect(reactionFired).toBeCalledTimes(0)
+    expect(reactionFired).toHaveBeenCalledTimes(0)
     expect(computed).toBe(2) // Not 3!
     expect(renders).toBe(2)
-    expect(doubleDisposed).toBeCalledTimes(0)
+    expect(doubleDisposed).toHaveBeenCalledTimes(0)
 
     r.unmount()
     cleanups.filter(Boolean).forEach(f => f())
-    expect(reactionFired).toBeCalledTimes(0)
+    expect(reactionFired).toHaveBeenCalledTimes(0)
     expect(computed).toBe(2)
     expect(renders).toBe(2)
-    expect(doubleDisposed).toBeCalledTimes(1)
+    expect(doubleDisposed).toHaveBeenCalledTimes(1)
 })
 
 it.skip("Legacy context support", () => {

diff --git a/packages/mobx-react-lite/__tests__/useAsObservableSource.deprecated.test.tsx b/packages/mobx-react-lite/__tests__/useAsObservableSource.deprecated.test.tsx
@@ -303,7 +303,7 @@ describe("enforcing actions", () => {
                 }
             }
         )
-        expect(onError).not.toBeCalled()
+        expect(onError).not.toHaveBeenCalled()
     })
     it("only when 'observed' should work", () => {
         configure({ enforceActions: "observed" })
@@ -323,7 +323,7 @@ describe("enforcing actions", () => {
                 }
             }
         )
-        expect(onError).not.toBeCalled()
+        expect(onError).not.toHaveBeenCalled()
     })
     it("'always' should work", () => {
         configure({ enforceActions: "always" })
@@ -343,6 +343,6 @@ describe("enforcing actions", () => {
                 }
             }
         )
-        expect(onError).not.toBeCalled()
+        expect(onError).not.toHaveBeenCalled()
     })
 })
diff --git a/packages/mobx-react-lite/__tests__/useAsObservableSource.test.tsx b/packages/mobx-react-lite/__tests__/useAsObservableSource.test.tsx
@@ -366,7 +366,7 @@ describe("enforcing actions", () => {
                 }
             }
         )
-        expect(onError).not.toBeCalled()
+        expect(onError).not.toHaveBeenCalled()
     })
     it("only when 'observed' should work", () => {
         configure({ enforceActions: "observed" })
@@ -386,7 +386,7 @@ describe("enforcing actions", () => {
                 }
             }
         )
-        expect(onError).not.toBeCalled()
+        expect(onError).not.toHaveBeenCalled()
     })
     it("'always' should work", () => {
         configure({ enforceActions: "always" })
@@ -406,7 +406,7 @@ describe("enforcing actions", () => {
                 }
             }
         )
-        expect(onError).not.toBeCalled()
+        expect(onError).not.toHaveBeenCalled()
     })
 })
 

diff --git a/packages/mobx-react-lite/__tests__/useLocalObservable.test.tsx b/packages/mobx-react-lite/__tests__/useLocalObservable.test.tsx
@@ -468,8 +468,8 @@ describe("enforcing actions", () => {
             }
         )
 
-        expect(onError).not.toBeCalled()
-        expect(consoleWarnMock).not.toBeCalled()
+        expect(onError).not.toHaveBeenCalled()
+        expect(consoleWarnMock).not.toHaveBeenCalled()
     })
     it("only when 'observed' should work", () => {
         mobx.configure({ enforceActions: "observed" })
@@ -504,8 +504,8 @@ describe("enforcing actions", () => {
             }
         )
 
-        expect(onError).not.toBeCalled()
-        expect(consoleWarnMock).not.toBeCalled()
+        expect(onError).not.toHaveBeenCalled()
+        expect(consoleWarnMock).not.toHaveBeenCalled()
     })
     it("'always' should work", () => {
         mobx.configure({ enforceActions: "always" })
@@ -540,7 +540,7 @@ describe("enforcing actions", () => {
             }
         )
 
-        expect(onError).not.toBeCalled()
-        expect(consoleWarnMock).toBeCalledTimes(2)
+        expect(onError).not.toHaveBeenCalled()
+        expect(consoleWarnMock).toHaveBeenCalledTimes(2)
     })
 })
diff --git a/packages/mobx-react/__tests__/__snapshots__/hooks.test.tsx.snap b/packages/mobx-react/__tests__/__snapshots__/hooks.test.tsx.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`computed properties react to props when using hooks 1`] = `
 [MockFunction] {

diff --git a/packages/mobx-react/__tests__/__snapshots__/observer.test.tsx.snap b/packages/mobx-react/__tests__/__snapshots__/observer.test.tsx.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`#3492 should not cause warning by calling forceUpdate on uncommited components 1`] = `[MockFunction]`;
 

diff --git a/packages/mobx-react/__tests__/__snapshots__/stateless.test.tsx.snap b/packages/mobx-react/__tests__/__snapshots__/stateless.test.tsx.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`stateless component with forwardRef is reactive 1`] = `
 <div>

diff --git a/packages/mobx-react/__tests__/issue806.test.tsx b/packages/mobx-react/__tests__/issue806.test.tsx
@@ -44,7 +44,7 @@ test("verify issue 806", () => {
     // make sure observableRequiresReaction is still working outside component
     withConsole(["warn"], () => {
         x.a.toString()
-        expect(console.warn).toBeCalledTimes(1)
+        expect(console.warn).toHaveBeenCalledTimes(1)
         expect(console.warn).toHaveBeenCalledWith(
             "[mobx] Observable 'ObservableObject@1.a' being read outside a reactive context."
         )

diff --git a/packages/mobx-react/__tests__/observer.test.tsx b/packages/mobx-react/__tests__/observer.test.tsx
@@ -1025,7 +1025,7 @@ test("#3492 should not cause warning by calling forceUpdate on uncommited compon
             }
         )
 
-        expect(() => render(<TestCmp />)).toThrowError(
+        expect(() => render(<TestCmp />)).toThrow(
             new RegExp(`^\\[mobx-react\\] Cannot read "TestCmp.${key}" in a reactive context`)
         )
 
@@ -1108,8 +1108,8 @@ test(`Observable changes in componenWillUnmount don't cause any warnings or erro
     expect(container).toHaveTextContent("0")
     unmount()
 
-    expect(consoleErrorSpy).not.toBeCalled()
-    expect(consoleWarnSpy).not.toBeCalled()
+    expect(consoleErrorSpy).not.toHaveBeenCalled()
+    expect(consoleWarnSpy).not.toHaveBeenCalled()
 
     consoleErrorSpy.mockRestore()
     consoleWarnSpy.mockRestore()

diff --git a/packages/mobx/__tests__/decorators_20223/stage3-decorators.ts b/packages/mobx/__tests__/decorators_20223/stage3-decorators.ts
@@ -196,7 +196,7 @@ test("ClassFieldDecorators should NOT work without accessor without legacy compi
         class Order {
             @observable price: number = 3
         }
-    }).toThrowError("[MobX] Please use `@observable accessor price` instead of `@observable price`")
+    }).toThrow("[MobX] Please use `@observable accessor price` instead of `@observable price`")
 })
 
 test("Reasonable error for decorator kind mismatch", () => {
@@ -205,7 +205,7 @@ test("Reasonable error for decorator kind mismatch", () => {
             // @ts-ignore
             @computed total = 3
         }
-    }).toThrowError("[MobX] The decorator applied to 'total' cannot be used on a field element")
+    }).toThrow("[MobX] The decorator applied to 'total' cannot be used on a field element")
 })
 
 test("typescript: parameterized computed decorator", () => {

diff --git a/packages/mobx/__tests__/v4/base/__snapshots__/array.js.snap b/packages/mobx/__tests__/v4/base/__snapshots__/array.js.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`very long arrays can be safely passed to nativeArray.concat #2379 1`] = `
 [MockFunction] {

diff --git a/packages/mobx/__tests__/v4/base/__snapshots__/extras.js.snap b/packages/mobx/__tests__/v4/base/__snapshots__/extras.js.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`spy 1 1`] = `
 [

diff --git a/packages/mobx/__tests__/v4/base/__snapshots__/makereactive.js.snap b/packages/mobx/__tests__/v4/base/__snapshots__/makereactive.js.snap
@@ -1,3 +1,3 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`computed value 1`] = `"ComputedValue@1[() => 3]"`;
diff --git a/packages/mobx/__tests__/v4/base/__snapshots__/object-api.js.snap b/packages/mobx/__tests__/v4/base/__snapshots__/object-api.js.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`observe & intercept 1`] = `
 [

diff --git a/packages/mobx/__tests__/v4/base/__snapshots__/observables.js.snap b/packages/mobx/__tests__/v4/base/__snapshots__/observables.js.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`delay autorun until end of transaction 1`] = `
 [

diff --git a/packages/mobx/__tests__/v4/base/__snapshots__/spy.js.snap b/packages/mobx/__tests__/v4/base/__snapshots__/spy.js.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`spy error 1`] = `
 [

diff --git a/packages/mobx/__tests__/v4/base/autorun.js b/packages/mobx/__tests__/v4/base/autorun.js
@@ -40,7 +40,7 @@ test("autorun can be disposed on first run", function () {
 test("autorun warns when passed an action", function () {
     const action = mobx.action(() => {})
     expect.assertions(1)
-    expect(() => mobx.autorun(action)).toThrowError(/Autorun does not accept actions/)
+    expect(() => mobx.autorun(action)).toThrow(/Autorun does not accept actions/)
 })
 
 test("autorun batches automatically", function () {