diff --git a/examples/basic.ts b/examples/basic.ts
index f8a3561..aea2f64 100644
--- a/examples/basic.ts
+++ b/examples/basic.ts
@@ -5,7 +5,37 @@ driver({ browser: 'chrome' }).then(({ service }) => {
 		{
 			method: 'getTitle',
 			operator: 'assertEquals',
-			except: 'Todo App',
+			except: 'Drowser',
+		},
+		{
+			method: 'getTitle',
+			operator: 'assertEquals',
+			except: 'Drowser',
+		},
+		{
+			method: 'getTitle',
+			operator: 'assertEquals',
+			except: 'Drowsers',
+		},
+		{
+			method: 'getTitle',
+			operator: 'assertEquals',
+			except: 'Drowser',
+		},
+		{
+			method: 'getTitle',
+			operator: 'assertEquals',
+			except: 'Drowsers',
+		},
+		{
+			method: 'getTitle',
+			operator: 'assertEquals',
+			except: 'Drowsers',
+		},
+		{
+			method: 'getTitle',
+			operator: 'assertEquals',
+			except: 'Drowser',
 		},
 	]
 }).catch((error) => {
diff --git a/src/constants.ts b/src/constants.ts
index ca09926..b03fba4 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -22,8 +22,8 @@ const seleniumExceptions: Record<string, string> = {
 }
 
 const caseStatus: Record<string, string> = {
-	ok: 'ok',
-	ko: 'ko',
+	passed: 'passed',
+	failed: 'failed',
 }
 
 export { caseStatus, driverBrowserList, driverBrowsers, seleniumExceptions }
diff --git a/src/driver.ts b/src/driver.ts
index 0f87726..f2fd028 100644
--- a/src/driver.ts
+++ b/src/driver.ts
@@ -85,7 +85,8 @@ const driver = async (
 				)
 				const methodPromises: Promise<void>[] = []
 				const result = (
-					{ id, name, actual, exceptation, status }: TDataResult,
+					{ id, name, actual, exceptation, status, duration, timestamp }:
+						TDataResult,
 				) => {
 					return {
 						id,
@@ -93,11 +94,14 @@ const driver = async (
 						actual,
 						exceptation,
 						status,
-						timestamp: new Date(),
+						timestamp,
+						duration,
 					}
 				}
 
 				service.cases.forEach((c: TDrowserServiceCase) => {
+					const start = performance.now()
+
 					if (typeof c === 'object') {
 						const method =
 							(builder as unknown as Record<string, Function>)[c.method]
@@ -110,24 +114,33 @@ const driver = async (
 								const assertFunction = assert[c.operator] as TAssertFunction
 								actualValue = v
 								assertFunction(actualValue, c.except)
+
+								const end = performance.now()
+
 								data.results.push(
 									result({
 										id: nanoid(),
 										name: c.method,
 										actual: actualValue,
 										exceptation: c.except,
-										status: caseStatus.ok,
+										status: caseStatus.passed,
+										timestamp: new Date(),
+										duration: end - start,
 									}),
 								)
 							})
 								.catch(() => {
+									const end = performance.now()
+
 									data.results.push(
 										result({
 											id: nanoid(),
 											name: c.method,
 											actual: actualValue,
 											exceptation: c.except,
-											status: caseStatus.ko,
+											status: caseStatus.failed,
+											timestamp: new Date(),
+											duration: end - start,
 										}),
 									)
 								})
diff --git a/src/export.ts b/src/export.ts
index 2c326e9..46e5f43 100644
--- a/src/export.ts
+++ b/src/export.ts
@@ -7,7 +7,7 @@ import {
 	writeJson,
 	writeJsonSync,
 } from '@deps'
-import { generateFileName } from '@pkg/utils.ts'
+import { generateFileName, humanizeDuration } from '@pkg/utils.ts'
 import { TDataResult, TJSON } from '@pkg/types.ts'
 
 const exportGeneratedLog = (
@@ -96,10 +96,13 @@ const exportJSONReport = (
 
 	if (Array.isArray(results) && results.length > 0) {
 		const jsonData = readJsonSync(filePath) as TJSON
+		const totalDuration = results.reduce((sum, r) => sum + r.duration, 0)
+		const averageDuration = totalDuration / results.length
 
 		jsonData.drowser.cases.push({
 			id: nanoid(),
 			time: new Date().toISOString(),
+			avg_duration: humanizeDuration(averageDuration),
 			cases: results,
 		})
 
diff --git a/src/types.ts b/src/types.ts
index 5934b49..b4200da 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -22,7 +22,8 @@ export type TDataResult = {
 	actual: unknown
 	exceptation: unknown
 	status: string
-	timestamp?: Date
+	timestamp: Date
+	duration: number
 }
 
 export type TData = {
@@ -71,6 +72,7 @@ export type TJSON = {
 			{
 				id: string
 				time: string
+				avg_duration: string
 				cases: Array<TDataResult>
 			},
 		]
diff --git a/src/utils.ts b/src/utils.ts
index aa9fe9a..4d0fb93 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -27,4 +27,24 @@ const generateFileName = (prefix: string, ext: 'log' | 'pdf'): string => {
 	return `${prefix}_${timestamp}.${ext}`
 }
 
-export { generateFileName, getTimestamp, isValidHttpUrl }
+const humanizeDuration = (durationMs: number): string => {
+	const secondsTotal = Math.round(durationMs / 1000)
+	const seconds = secondsTotal % 60
+	const minutesTotal = Math.floor(secondsTotal / 60)
+	const minutes = minutesTotal % 60
+	const hoursTotal = Math.floor(minutesTotal / 60)
+	const hours = hoursTotal % 24
+	const days = Math.floor(hoursTotal / 24)
+
+	let humanized = ''
+	if (days > 0) humanized += `${days}d `
+	if (hours > 0) humanized += `${hours}h `
+	if (minutes > 0) humanized += `${minutes}m `
+	if (seconds > 0 || (days === 0 && hours === 0 && minutes === 0)) {
+		humanized += `${seconds}s`
+	}
+
+	return humanized.trim()
+}
+
+export { generateFileName, getTimestamp, humanizeDuration, isValidHttpUrl }