diff --git a/packages/vitest/src/node/reporters/json.ts b/packages/vitest/src/node/reporters/json.ts
index bdad4fe9a3f7..8d102e7ee4cb 100644
--- a/packages/vitest/src/node/reporters/json.ts
+++ b/packages/vitest/src/node/reporters/json.ts
@@ -6,13 +6,20 @@ import { getSuites, getTests } from '../../utils'
 
 // for compatibility reasons, the reporter produces a JSON similar to the one produced by the Jest JSON reporter
 // the following types are extracted from the Jest repository (and simplified)
+type Milliseconds = number
 interface TestResult {
   displayName?: string
   failureMessage?: string | null
   skipped: boolean
   status?: string
   testFilePath?: string
+  perfStats: {
+    end?: Milliseconds
+    runtime?: Milliseconds
+    start?: Milliseconds
+  }
 }
+
 interface AggregatedResult {
   numFailedTests: number
   numFailedTestSuites: number
@@ -54,6 +61,11 @@ export class JsonReporter implements Reporter {
     const success = numFailedTestSuites === 0 && numFailedTests === 0
 
     const testResults: Array<TestResult> = tests.map(t => ({
+      perfStats: {
+        runtime: t.result?.duration,
+        start: t.result?.startTime,
+        end: t.result?.duration && t.result?.startTime && t.result.duration + t.result.startTime,
+      },
       displayName: t.name,
       failureMessage: t.result?.error?.message,
       skipped: t.mode === 'skip',
diff --git a/packages/vitest/src/runtime/run.ts b/packages/vitest/src/runtime/run.ts
index cdf48bf2aea2..4726f6508e76 100644
--- a/packages/vitest/src/runtime/run.ts
+++ b/packages/vitest/src/runtime/run.ts
@@ -71,6 +71,7 @@ export async function runTest(test: Test) {
 
   test.result = {
     state: 'run',
+    startTime: Date.now(),
   }
   updateTask(test)
 
@@ -154,6 +155,7 @@ export async function runSuite(suite: Suite) {
 
   suite.result = {
     state: 'run',
+    startTime: Date.now(),
   }
 
   updateTask(suite)
diff --git a/packages/vitest/src/types/tasks.ts b/packages/vitest/src/types/tasks.ts
index 22143492f0cb..fb387764bac7 100644
--- a/packages/vitest/src/types/tasks.ts
+++ b/packages/vitest/src/types/tasks.ts
@@ -18,6 +18,7 @@ export interface TaskBase {
 export interface TaskResult {
   state: TaskState
   duration?: number
+  startTime?: number
   error?: ErrorWithDiff
   hooks?: Partial<Record<keyof SuiteHooks, TaskState>>
 }
diff --git a/test/reporters/tests/__snapshots__/reporters.spec.ts.snap b/test/reporters/tests/__snapshots__/reporters.spec.ts.snap
index daacc0152ac2..6aeae86d21bb 100644
--- a/test/reporters/tests/__snapshots__/reporters.spec.ts.snap
+++ b/test/reporters/tests/__snapshots__/reporters.spec.ts.snap
@@ -31,70 +31,91 @@ AssertionError: expected 2.23606797749979 to equal 2
 `;
 
 exports[`json reporter 1`] = `
-"{
-  \\"numTotalTestSuites\\": 3,
-  \\"numPassedTestSuites\\": 3,
-  \\"numFailedTestSuites\\": 0,
-  \\"numPendingTestSuites\\": 0,
-  \\"numTotalTests\\": 8,
-  \\"numPassedTests\\": 7,
-  \\"numFailedTests\\": 1,
-  \\"numPendingTests\\": 0,
-  \\"numTodoTests\\": 0,
-  \\"startTime\\": 1642587001759,
-  \\"success\\": false,
-  \\"testResults\\": [
+{
+  "numFailedTestSuites": 0,
+  "numFailedTests": 1,
+  "numPassedTestSuites": 3,
+  "numPassedTests": 7,
+  "numPendingTestSuites": 0,
+  "numPendingTests": 0,
+  "numTodoTests": 0,
+  "numTotalTestSuites": 3,
+  "numTotalTests": 8,
+  "startTime": 1642587001759,
+  "success": false,
+  "testResults": [
     {
-      \\"displayName\\": \\"Math.sqrt()\\",
-      \\"failureMessage\\": \\"expected 2.23606797749979 to equal 2\\",
-      \\"skipped\\": false,
-      \\"status\\": \\"fail\\",
-      \\"testFilePath\\": \\"/vitest/test/core/test/basic.test.ts\\"
+      "displayName": "Math.sqrt()",
+      "failureMessage": "expected 2.23606797749979 to equal 2",
+      "perfStats": {
+        "runtime": 1.4422860145568848,
+      },
+      "skipped": false,
+      "status": "fail",
+      "testFilePath": "/vitest/test/core/test/basic.test.ts",
     },
     {
-      \\"displayName\\": \\"JSON\\",
-      \\"skipped\\": false,
-      \\"status\\": \\"pass\\",
-      \\"testFilePath\\": \\"/vitest/test/core/test/basic.test.ts\\"
+      "displayName": "JSON",
+      "perfStats": {
+        "runtime": 1.0237109661102295,
+      },
+      "skipped": false,
+      "status": "pass",
+      "testFilePath": "/vitest/test/core/test/basic.test.ts",
     },
     {
-      \\"displayName\\": \\"async with timeout\\",
-      \\"skipped\\": true,
-      \\"testFilePath\\": \\"/vitest/test/core/test/basic.test.ts\\"
+      "displayName": "async with timeout",
+      "perfStats": {},
+      "skipped": true,
+      "testFilePath": "/vitest/test/core/test/basic.test.ts",
     },
     {
-      \\"displayName\\": \\"timeout\\",
-      \\"skipped\\": false,
-      \\"status\\": \\"pass\\",
-      \\"testFilePath\\": \\"/vitest/test/core/test/basic.test.ts\\"
+      "displayName": "timeout",
+      "perfStats": {
+        "runtime": 100.50598406791687,
+      },
+      "skipped": false,
+      "status": "pass",
+      "testFilePath": "/vitest/test/core/test/basic.test.ts",
     },
     {
-      \\"displayName\\": \\"callback setup success \\",
-      \\"skipped\\": false,
-      \\"status\\": \\"pass\\",
-      \\"testFilePath\\": \\"/vitest/test/core/test/basic.test.ts\\"
+      "displayName": "callback setup success ",
+      "perfStats": {
+        "runtime": 20.184875011444092,
+      },
+      "skipped": false,
+      "status": "pass",
+      "testFilePath": "/vitest/test/core/test/basic.test.ts",
     },
     {
-      \\"displayName\\": \\"callback test success \\",
-      \\"skipped\\": false,
-      \\"status\\": \\"pass\\",
-      \\"testFilePath\\": \\"/vitest/test/core/test/basic.test.ts\\"
+      "displayName": "callback test success ",
+      "perfStats": {
+        "runtime": 0.33245420455932617,
+      },
+      "skipped": false,
+      "status": "pass",
+      "testFilePath": "/vitest/test/core/test/basic.test.ts",
     },
     {
-      \\"displayName\\": \\"callback setup success done(false)\\",
-      \\"skipped\\": false,
-      \\"status\\": \\"pass\\",
-      \\"testFilePath\\": \\"/vitest/test/core/test/basic.test.ts\\"
+      "displayName": "callback setup success done(false)",
+      "perfStats": {
+        "runtime": 19.738605976104736,
+      },
+      "skipped": false,
+      "status": "pass",
+      "testFilePath": "/vitest/test/core/test/basic.test.ts",
     },
     {
-      \\"displayName\\": \\"callback test success done(false)\\",
-      \\"skipped\\": false,
-      \\"status\\": \\"pass\\",
-      \\"testFilePath\\": \\"/vitest/test/core/test/basic.test.ts\\"
-    }
-  ]
+      "displayName": "callback test success done(false)",
+      "perfStats": {
+        "runtime": 0.1923508644104004,
+      },
+      "skipped": false,
+      "status": "pass",
+      "testFilePath": "/vitest/test/core/test/basic.test.ts",
+    },
+  ],
 }
-"
 `;
 
 exports[`tap reporter 1`] = `
diff --git a/test/reporters/tests/custom-reporter.spec.ts b/test/reporters/tests/custom-reporter.spec.ts
index 680affdc16bd..f63075ce955b 100644
--- a/test/reporters/tests/custom-reporter.spec.ts
+++ b/test/reporters/tests/custom-reporter.spec.ts
@@ -16,4 +16,4 @@ test('custom reporters work', async() => {
   })
 
   expect(stdout).toContain('hello from custom reporter')
-}, 20000)
+}, 40000)
diff --git a/test/reporters/tests/reporters.spec.ts b/test/reporters/tests/reporters.spec.ts
index 7e41d83cb463..5b341fd5e632 100644
--- a/test/reporters/tests/reporters.spec.ts
+++ b/test/reporters/tests/reporters.spec.ts
@@ -67,5 +67,5 @@ test('json reporter', async() => {
   await reporter.onFinished(files)
 
   // Assert
-  expect(context.output).toMatchSnapshot()
+  expect(JSON.parse(context.output)).toMatchSnapshot()
 })