diff --git a/examples/run-examples/basic-game/.github/workflows/ci.yml b/examples/run-examples/basic-game/.github/workflows/ci.yml
new file mode 100644
index 0000000..8e84736
--- /dev/null
+++ b/examples/run-examples/basic-game/.github/workflows/ci.yml
@@ -0,0 +1,14 @@
+name: build
+
+on: [push, pull_request]
+jobs:
+  wollok-ts:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - run: |
+          wget -O wollok-ts-cli https://github.com/uqbar-project/wollok-ts-cli/releases/latest/download/wollok-ts-cli-linux-x64
+          chmod a+x ./wollok-ts-cli
+          ./wollok-ts-cli test --skipValidations -p ./
+        shell: bash
diff --git a/examples/run-examples/basic-game/README.md b/examples/run-examples/basic-game/README.md
new file mode 100644
index 0000000..76b305e
--- /dev/null
+++ b/examples/run-examples/basic-game/README.md
@@ -0,0 +1,6 @@
+
+
+## example
+
+TODO
+
diff --git a/examples/run-examples/basic-game/example.wlk b/examples/run-examples/basic-game/example.wlk
new file mode 100644
index 0000000..4be5144
--- /dev/null
+++ b/examples/run-examples/basic-game/example.wlk
@@ -0,0 +1,14 @@
+object pepita {
+  var energy = 100
+
+  method energy() = energy
+
+  method eat(grams) {
+    energy = energy + grams * 10
+  }
+
+  method fly(minutes) {
+    energy = energy - minutes * 3
+  }
+
+}
\ No newline at end of file
diff --git a/examples/run-examples/basic-game/mainExample.wpgm b/examples/run-examples/basic-game/mainExample.wpgm
new file mode 100644
index 0000000..dc75868
--- /dev/null
+++ b/examples/run-examples/basic-game/mainExample.wpgm
@@ -0,0 +1,14 @@
+import example.pepita
+
+program PepitaProgram {
+
+	pepita.fly(10)
+	console.println("Pepita empieza con " + pepita.energy())
+	console.println("Vuela")
+	pepita.fly(10)
+	console.println(pepita.energy())
+	console.println("Come")
+	pepita.eat(25)
+	console.println(pepita.energy())
+
+}
\ No newline at end of file
diff --git a/examples/run-examples/basic-game/mainGame.wpgm b/examples/run-examples/basic-game/mainGame.wpgm
new file mode 100644
index 0000000..01573ad
--- /dev/null
+++ b/examples/run-examples/basic-game/mainGame.wpgm
@@ -0,0 +1,32 @@
+object pepita {
+  var energy = 100
+  var nombre = "Pepita"
+  var property image = "pepita.png"
+  var property position = new MutablePosition(x = 0, y = 1)
+  var height = 10
+  var width = 10
+
+  method energy() = energy
+
+  method eat(grams) {
+    energy = energy + grams * 10
+  }
+
+  method fly(minutes) {
+    energy = energy - minutes * 3
+  }
+
+}
+
+program PepitaGame {
+	game.addVisualCharacter(pepita)
+
+  // Stop on connection (from any client)
+  game.onTick(0, "end", {
+    console.println("finishing...")
+    game.stop()
+  })
+
+  console.println("starting...")
+	game.start()
+}
diff --git a/examples/run-examples/basic-game/package.json b/examples/run-examples/basic-game/package.json
new file mode 100644
index 0000000..e662fff
--- /dev/null
+++ b/examples/run-examples/basic-game/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "existing-folder",
+  "version": "1.0.0",
+  "resourceFolder": "specialAssets",
+  "wollokVersion": "4.0.0",
+  "author": "dodain",
+  "license": "ISC"
+}
diff --git a/examples/run-examples/basic-game/specialAssets/pepita.png b/examples/run-examples/basic-game/specialAssets/pepita.png
new file mode 100644
index 0000000..bb052db
Binary files /dev/null and b/examples/run-examples/basic-game/specialAssets/pepita.png differ
diff --git a/examples/run-examples/basic-game/testExample.wtest b/examples/run-examples/basic-game/testExample.wtest
new file mode 100644
index 0000000..7886ddb
--- /dev/null
+++ b/examples/run-examples/basic-game/testExample.wtest
@@ -0,0 +1,9 @@
+import example.pepita
+
+describe "group of tests for pepita" {
+
+  test "pepita has initial energy" {
+    assert.equals(100, pepita.energy())
+  }
+
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index f8a8c62..7f5735c 100644
--- a/package.json
+++ b/package.json
@@ -22,11 +22,12 @@
     "prepare": "node ./scripts/download-libs.js && npm run build:tools",
     "start": "node ./build/src/index.js",
     "test": "npm run lint && npm run test:unit",
-    "test:diagram": "mocha -r ts-node/register/transpile-only test/**/diagram.test.ts --timeout 7000",
+    "test:diagram": "mocha -r ts-node/register/transpile-only test/**/diagram.test.ts --timeout 5000",
+    "test:run": "mocha -r ts-node/register/transpile-only test/**/run.test.ts --timeout 2000",
     "test-with-coverage": "npm run lint && nyc --reporter=json --lines 70 npm run test:unit",
     "lint": "eslint . ",
     "lint:fix": "eslint . --fix",
-    "test:unit": "mocha --parallel -r ts-node/register/transpile-only test/**/*.test.ts --timeout 7000",
+    "test:unit": "mocha --parallel -r ts-node/register/transpile-only test/**/*.test.ts --timeout 5000",
     "build:tools": "shx cp ./node_modules/wollok-web-tools/dist/web/game-index.js ./public/game/lib && shx cp ./node_modules/wollok-web-tools/dist/dynamicDiagram/diagram-index.js ./public/diagram",
     "build": "shx rm -rf build && shx mkdir ./build && shx cp -r ./public ./build/public && tsc -p ./tsconfig.build.json",
     "watch": "npm run build -- -w",
diff --git a/src/commands/run.ts b/src/commands/run.ts
index d03c012..677644c 100644
--- a/src/commands/run.ts
+++ b/src/commands/run.ts
@@ -21,7 +21,7 @@ export type Options = {
   host: string,
   port: string
   game: boolean,
-  startDiagram: boolean
+  startDiagram: boolean,
 }
 
 const DEFAULT_PORT = '4200'
@@ -31,8 +31,8 @@ type DynamicDiagramClient = {
   onReload: () => void,
 }
 
-export default async function (programFQN: Name, options: Options): Promise<void> {
-  const { project, game } = options
+export default async function (programFQN: Name, options: Options): Promise<Server | undefined> {
+  const { game, project, assets } = options
   const timeMeasurer = new TimeMeasurer()
   try {
     logger.info(`${game ? gameIcon : programIcon} Running program ${valueDescription(programFQN)} ${runner(game)} on ${valueDescription(project)}`)
@@ -52,16 +52,18 @@ export default async function (programFQN: Name, options: Options): Promise<void
     const environment = await buildEnvironmentForProgram(options)
     const debug = logger.getLevel() <= logger.levels.DEBUG
     if (debug) time(successDescription('Run initiated successfully'))
+    const assetFiles = getAllAssets(project, assets)
 
-
-    const ioGame: Server | undefined = initializeGameClient(options)
     const interpreter = game ? getGameInterpreter(environment) : interpret(environment, { ...natives })
     const programPackage = environment.getNodeByFQN<Package>(programFQN).parent as Package
     const dynamicDiagramClient = await initializeDynamicDiagram(programPackage, options, interpreter)
+    const ioGame: Server | undefined = initializeGameClient(options)
 
     interpreter.run(programFQN)
 
-    eventsFor(ioGame!, interpreter, dynamicDiagramClient, options)
+    if (game) {
+      eventsFor(ioGame!, interpreter, dynamicDiagramClient, assetFiles)
+    }
 
     if (debug) timeEnd(successDescription('Run finalized successfully'))
 
@@ -69,6 +71,8 @@ export default async function (programFQN: Name, options: Options): Promise<void
       fileLogger.info({ message: `${programIcon} Program executed ${programFQN} on ${project}`, timeElapsed: timeMeasurer.elapsedTime(), ok: true })
       process.exit(0)
     }
+
+    return ioGame
   } catch (error: any) {
     handleError(error)
     fileLogger.info({ message: `${game ? gameIcon : programIcon} ${game ? 'Game' : 'Program'} executed ${programFQN} on ${project}`, timeElapsed: timeMeasurer.elapsedTime(), ok: false, error: sanitizeStackTrace(error) })
@@ -145,15 +149,7 @@ export async function initializeDynamicDiagram(programPackage: Package, options:
   }
 }
 
-export const eventsFor = (io: Server, interpreter: Interpreter, dynamicDiagramClient: DynamicDiagramClient, { game, project, assets }: Options): void => {
-  if (!game) return
-  const baseFolder = join(project, assets)
-  if (!existsSync(baseFolder))
-    logger.warn(failureDescription(`Resource folder for images not found: ${assets}`))
-
-
-  const assetFiles = getAllAssets(project, assets)
-
+export const eventsFor = (io: Server, interpreter: Interpreter, dynamicDiagramClient: DynamicDiagramClient, assetFiles: Asset[]): void => {
   io.on('connection', socket => {
     logger.info(successDescription('Running game!'))
     socket.on('keyPressed', (events: string[]) => {
@@ -211,7 +207,7 @@ export const eventsFor = (io: Server, interpreter: Interpreter, dynamicDiagramCl
 export const getAllAssets = (projectPath: string, assetsFolder: string): Asset[] => {
   const baseFolder = join(projectPath, assetsFolder)
   if (!existsSync(baseFolder))
-    throw `Folder image ${baseFolder} does not exist`
+    throw new Error(`Folder image ${baseFolder} does not exist`)
 
   const fileRelativeFor = (fileName: string) => ({ name: fileName, url: fileName })
 
diff --git a/src/index.ts b/src/index.ts
index 80ffc44..708e90b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -27,7 +27,7 @@ program.command('run')
   .option('-g, --game', 'sets the program as a game', false)
   .option('-v, --verbose', 'print debugging information', false)
   .option('-d, --startDiagram', 'activate the dynamic diagram (only for games)', false)
-  .action(run)
+  .action((programFQN, options) => { run(programFQN, options) })
 
 program.command('test')
   .description('Run Wollok tests')
diff --git a/test/diagram.test.ts b/test/diagram.test.ts
index 887fec0..24ba8b9 100644
--- a/test/diagram.test.ts
+++ b/test/diagram.test.ts
@@ -19,7 +19,7 @@ describe('Dynamic diagram', () => {
     port: '8080',
     host: 'localhost',
     darkMode: true,
-    skipDiagram: false,
+    skipDiagram: true, // we don't want to open a socket
   }
   let interpreter: Interpreter
 
diff --git a/test/dynamicDiagramClient.test.ts b/test/dynamicDiagramClient.test.ts
index 7aca140..b8a254b 100644
--- a/test/dynamicDiagramClient.test.ts
+++ b/test/dynamicDiagramClient.test.ts
@@ -36,10 +36,13 @@ describe('dynamic diagram client', () => {
 
   it('should work for root path', async () => {
     const { enabled, app, server } = await initializeClient(options, repl, interpreter)
-    expect(enabled).to.be.true
-    const result = await chai.request(app).get('/index.html')
-    expect(result).to.have.status(200)
-    server!.close()
+    try {
+      expect(enabled).to.be.true
+      const result = await chai.request(app).get('/index.html')
+      expect(result).to.have.status(200)
+    } finally {
+      server!.close()
+    }
   })
 
   it('should return a fake client if skipDiagram is set', async () => {
diff --git a/test/fullRepl.test.ts b/test/fullRepl.test.ts
index 93eb427..068b49f 100644
--- a/test/fullRepl.test.ts
+++ b/test/fullRepl.test.ts
@@ -30,10 +30,6 @@ const buildOptionsFor = (path: string, skipValidations = false) => ({
 const callRepl = (autoImportPath: string, options: Options) =>
   replFn(join(options.project, autoImportPath), options)
 
-// Be careful, if you are in developing mode
-// and some of these tests fail it will lead to exit code 13
-// because an active session of the dynamic diagram
-// will remain running in background
 describe('REPL integration test for valid project', () => {
   const projectPath = join('examples', 'repl-examples')
 
@@ -43,7 +39,7 @@ describe('REPL integration test for valid project', () => {
     darkMode: true,
     host: 'localhost',
     port: '8080',
-    skipDiagram: false,
+    skipDiagram: true,
   }
   let processExitSpy: sinon.SinonStub
   let consoleLogSpy: sinon.SinonStub
diff --git a/test/repl.test.ts b/test/repl.test.ts
index c8e806d..4f1dfbf 100644
--- a/test/repl.test.ts
+++ b/test/repl.test.ts
@@ -16,7 +16,7 @@ describe('REPL', () => {
     darkMode: true,
     port: '8080',
     host: 'localhost',
-    skipDiagram: false,
+    skipDiagram: true,
   }
 
   let interpreter: Interpreter
diff --git a/test/run.test.ts b/test/run.test.ts
index 3055d0a..7193cd3 100644
--- a/test/run.test.ts
+++ b/test/run.test.ts
@@ -1,14 +1,17 @@
 import chai from 'chai'
+import chaiAsPromised from 'chai-as-promised'
+import chaiHttp from 'chai-http'
 import { mkdirSync, rmdirSync } from 'fs'
 import { join } from 'path'
 import sinon from 'sinon'
-import { io as ioc } from 'socket.io-client'
+import * as utils from '../src/utils'
 import run, { buildEnvironmentForProgram, getAllAssets, getAssetsFolder, getGameInterpreter, getSoundsFolder, getVisuals, Options } from '../src/commands/run'
 import { logger as fileLogger } from '../src/logger'
 import { spyCalledWithSubstring } from './assertions'
 
-
 chai.should()
+chai.use(chaiHttp)
+chai.use(chaiAsPromised)
 const expect = chai.expect
 
 const project = join('examples', 'run-examples', 'basic-example')
@@ -216,20 +219,53 @@ describe('testing run', () => {
   })
 
   describe('run a simple game', () => {
+    let handleErrorSpy: sinon.SinonStub
+    let processExitSpy: sinon.SinonStub
+    let errorReturned: string | undefined = undefined
+
+    beforeEach(() => {
+      handleErrorSpy = sinon.stub(utils, 'handleError')
+      handleErrorSpy.callsFake((error) => {
+        console.info(`👾👾👾 ${error.message} 👾👾👾`)
+        errorReturned = error.message
+      })
+      processExitSpy = sinon.stub(process, 'exit')
+    })
+
+    afterEach(() => {
+      sinon.restore()
+    })
 
-    it('smoke test - should work if program has no errors', done => {
-      run('mainGame.PepitaGame', {
+    it('smoke test - should work if program has no errors', async () => {
+      const ioGame = await run('mainGame.PepitaGame', {
+        project: join('examples', 'run-examples', 'basic-game'),
+        skipValidations: false,
+        game: true,
+        startDiagram: false,
+        assets: 'specialAssets',
+        port: '3000',
+        host: 'localhost',
+      })
+      ioGame?.close()
+      expect(processExitSpy.calledWith(0)).to.be.false
+      expect(errorReturned).to.be.undefined
+    })
+
+    it('smoke test - should not work if program has errors', async () => {
+      const ioGame = await run('mainGame.PepitaGame', {
         project: join('examples', 'run-examples', 'basic-example'),
         skipValidations: false,
         game: true,
         startDiagram: false,
-        assets,
+        assets: 'specialAssets',
         port: '3000',
         host: 'localhost',
       })
-      const clientSocket = ioc('http://localhost:3000')
-      clientSocket.on('connect', done) // Game finish on client connection
+      ioGame?.close()
+      expect(processExitSpy.calledWith(21)).to.be.false
+      expect(errorReturned).to.equal('Folder image examples/run-examples/basic-example/specialAssets does not exist')
     })
+
   })
 
 })
\ No newline at end of file