diff --git a/packages/docker/package.json b/packages/docker/package.json
index 707e891..ea8ba84 100644
--- a/packages/docker/package.json
+++ b/packages/docker/package.json
@@ -5,7 +5,10 @@
   "main": "lib/index.js",
   "scripts": {
     "test": "jest --runInBand",
-    "build": "npx tsc && npx ncc build"
+    "build": "npx tsc && npx ncc build",
+    "format": "prettier --write '**/*.ts'",
+    "format-check": "prettier --check '**/*.ts'",
+    "lint": "eslint src/**/*.ts"
   },
   "author": "",
   "license": "MIT",
diff --git a/packages/docker/src/dockerCommands/container.ts b/packages/docker/src/dockerCommands/container.ts
index 91637a9..807d77a 100644
--- a/packages/docker/src/dockerCommands/container.ts
+++ b/packages/docker/src/dockerCommands/container.ts
@@ -43,11 +43,16 @@ export async function createContainer(
 
   if (args.environmentVariables) {
     for (const [key] of Object.entries(args.environmentVariables)) {
-      dockerArgs.push('-e')
-      dockerArgs.push(key)
+      dockerArgs.push('-e', key)
     }
   }
 
+  dockerArgs.push('-e', 'GITHUB_ACTIONS=true')
+  // Use same behavior as the runner https://github.com/actions/runner/blob/27d9c886ab9a45e0013cb462529ac85d581f8c41/src/Runner.Worker/Container/DockerCommandManager.cs#L150
+  if (!('CI' in (args.environmentVariables ?? {}))) {
+    dockerArgs.push('-e', 'CI=true')
+  }
+
   const mountVolumes = [
     ...(args.userMountVolumes || []),
     ...(args.systemMountVolumes || [])
@@ -403,11 +408,16 @@ export async function containerRun(
   }
   if (args.environmentVariables) {
     for (const [key] of Object.entries(args.environmentVariables)) {
-      dockerArgs.push('-e')
-      dockerArgs.push(key)
+      dockerArgs.push('-e', key)
     }
   }
 
+  dockerArgs.push('-e', 'GITHUB_ACTIONS=true')
+  // Use same behavior as the runner https://github.com/actions/runner/blob/27d9c886ab9a45e0013cb462529ac85d581f8c41/src/Runner.Worker/Container/DockerCommandManager.cs#L150
+  if (!('CI' in (args.environmentVariables ?? {}))) {
+    dockerArgs.push('-e', 'CI=true')
+  }
+
   const mountVolumes = [
     ...(args.userMountVolumes || []),
     ...(args.systemMountVolumes || [])
diff --git a/packages/docker/tests/run-script-step-test.ts b/packages/docker/tests/run-script-step-test.ts
index 5fdd33c..edf1f02 100644
--- a/packages/docker/tests/run-script-step-test.ts
+++ b/packages/docker/tests/run-script-step-test.ts
@@ -75,4 +75,22 @@ describe('run script step', () => {
       runScriptStep(definitions.runScriptStep.args, prepareJobResponse.state)
     ).resolves.not.toThrow()
   })
+
+  it('Should confirm that CI and GITHUB_ACTIONS are set', async () => {
+    definitions.runScriptStep.args.entryPoint = '/bin/bash'
+    definitions.runScriptStep.args.entryPointArgs = [
+      '-c',
+      `'if [[ ! $(env | grep "^CI=") = "CI=true" ]]; then exit 1; fi'`
+    ]
+    await expect(
+      runScriptStep(definitions.runScriptStep.args, prepareJobResponse.state)
+    ).resolves.not.toThrow()
+    definitions.runScriptStep.args.entryPointArgs = [
+      '-c',
+      `'if [[ ! $(env | grep "^GITHUB_ACTIONS=") = "GITHUB_ACTIONS=true" ]]; then exit 1; fi'`
+    ]
+    await expect(
+      runScriptStep(definitions.runScriptStep.args, prepareJobResponse.state)
+    ).resolves.not.toThrow()
+  })
 })
diff --git a/packages/k8s/src/hooks/prepare-job.ts b/packages/k8s/src/hooks/prepare-job.ts
index 89202dc..1dc7ad3 100644
--- a/packages/k8s/src/hooks/prepare-job.ts
+++ b/packages/k8s/src/hooks/prepare-job.ts
@@ -229,6 +229,18 @@ export function createContainerSpec(
     }
   }
 
+  podContainer.env.push({
+    name: 'GITHUB_ACTIONS',
+    value: 'true'
+  })
+
+  if (!('CI' in container['environmentVariables'])) {
+    podContainer.env.push({
+      name: 'CI',
+      value: 'true'
+    })
+  }
+
   podContainer.volumeMounts = containerVolumes(
     container.userMountVolumes,
     jobContainer
diff --git a/packages/k8s/src/hooks/run-container-step.ts b/packages/k8s/src/hooks/run-container-step.ts
index dbc98b4..e526153 100644
--- a/packages/k8s/src/hooks/run-container-step.ts
+++ b/packages/k8s/src/hooks/run-container-step.ts
@@ -29,7 +29,14 @@ export async function runContainerStep(
   let secretName: string | undefined = undefined
   if (stepContainer.environmentVariables) {
     try {
-      secretName = await createSecretForEnvs(stepContainer.environmentVariables)
+      const envs = JSON.parse(
+        JSON.stringify(stepContainer.environmentVariables)
+      )
+      envs['GITHUB_ACTIONS'] = 'true'
+      if (!('CI' in envs)) {
+        envs.CI = 'true'
+      }
+      secretName = await createSecretForEnvs(envs)
     } catch (err) {
       core.debug(`createSecretForEnvs failed: ${JSON.stringify(err)}`)
       const message = (err as any)?.response?.body?.message || err
diff --git a/packages/k8s/tests/prepare-job-test.ts b/packages/k8s/tests/prepare-job-test.ts
index 18e3683..ca94e6c 100644
--- a/packages/k8s/tests/prepare-job-test.ts
+++ b/packages/k8s/tests/prepare-job-test.ts
@@ -62,6 +62,54 @@ describe('Prepare job', () => {
     ).resolves.not.toThrow()
   })
 
+  it('should prepare job with envs CI and GITHUB_ACTIONS', async () => {
+    await prepareJob(prepareJobData.args, prepareJobOutputFilePath)
+
+    const content = JSON.parse(
+      fs.readFileSync(prepareJobOutputFilePath).toString()
+    )
+
+    const got = await getPodByName(content.state.jobPod)
+    expect(got.spec?.containers[0].env).toEqual(
+      expect.arrayContaining([
+        { name: 'CI', value: 'true' },
+        { name: 'GITHUB_ACTIONS', value: 'true' }
+      ])
+    )
+    expect(got.spec?.containers[1].env).toEqual(
+      expect.arrayContaining([
+        { name: 'CI', value: 'true' },
+        { name: 'GITHUB_ACTIONS', value: 'true' }
+      ])
+    )
+  })
+
+  it('should not override CI env var if already set', async () => {
+    prepareJobData.args.container.environmentVariables = {
+      CI: 'false'
+    }
+
+    await prepareJob(prepareJobData.args, prepareJobOutputFilePath)
+
+    const content = JSON.parse(
+      fs.readFileSync(prepareJobOutputFilePath).toString()
+    )
+
+    const got = await getPodByName(content.state.jobPod)
+    expect(got.spec?.containers[0].env).toEqual(
+      expect.arrayContaining([
+        { name: 'CI', value: 'false' },
+        { name: 'GITHUB_ACTIONS', value: 'true' }
+      ])
+    )
+    expect(got.spec?.containers[1].env).toEqual(
+      expect.arrayContaining([
+        { name: 'CI', value: 'true' },
+        { name: 'GITHUB_ACTIONS', value: 'true' }
+      ])
+    )
+  })
+
   it('should throw an exception if the user volume mount is absolute path outside of GITHUB_WORKSPACE', async () => {
     prepareJobData.args.container.userMountVolumes = [
       {
@@ -133,9 +181,13 @@ describe('Prepare job', () => {
     expect(got.spec?.containers[1].image).toBe('redis')
     expect(got.spec?.containers[1].command).toBeFalsy()
     expect(got.spec?.containers[1].args).toBeFalsy()
-    expect(got.spec?.containers[1].env).toEqual([
-      { name: 'ENV2', value: 'value2' }
-    ])
+    expect(got.spec?.containers[1].env).toEqual(
+      expect.arrayContaining([
+        { name: 'CI', value: 'true' },
+        { name: 'GITHUB_ACTIONS', value: 'true' },
+        { name: 'ENV2', value: 'value2' }
+      ])
+    )
     expect(got.spec?.containers[1].resources).toEqual({
       requests: { memory: '1Mi', cpu: '1' },
       limits: { memory: '1Gi', cpu: '2' }
diff --git a/packages/k8s/tests/run-container-step-test.ts b/packages/k8s/tests/run-container-step-test.ts
index 7689c80..51a33b7 100644
--- a/packages/k8s/tests/run-container-step-test.ts
+++ b/packages/k8s/tests/run-container-step-test.ts
@@ -78,4 +78,15 @@ describe('Run container step', () => {
       runContainerStep(runContainerStepData.args)
     ).resolves.not.toThrow()
   })
+
+  it('should run container step with envs CI and GITHUB_ACTIONS', async () => {
+    runContainerStepData.args.entryPoint = 'bash'
+    runContainerStepData.args.entryPointArgs = [
+      '-c',
+      "'if [[ -z $GITHUB_ACTIONS  ]] || [[ -z $CI ]]; then exit 1; fi'"
+    ]
+    await expect(
+      runContainerStep(runContainerStepData.args)
+    ).resolves.not.toThrow()
+  })
 })