diff --git a/__test__/git-auth-helper.test.ts b/__test__/git-auth-helper.test.ts
index 64d49cc83..adadd8b2c 100644
--- a/__test__/git-auth-helper.test.ts
+++ b/__test__/git-auth-helper.test.ts
@@ -5,8 +5,8 @@ import * as io from '@actions/io'
 import * as os from 'os'
 import * as path from 'path'
 import * as stateHelper from '../lib/state-helper'
-import {IGitCommandManager} from '../lib/git-command-manager'
-import {IGitSourceSettings} from '../lib/git-source-settings'
+import { IGitCommandManager } from '../lib/git-command-manager'
+import { IGitSourceSettings } from '../lib/git-source-settings'
 
 const isWindows = process.platform === 'win32'
 const testWorkspace = path.join(__dirname, '_temp', 'git-auth-helper')
@@ -17,9 +17,10 @@ let localGitConfigPath: string
 let globalGitConfigPath: string
 let runnerTemp: string
 let tempHomedir: string
-let git: IGitCommandManager & {env: {[key: string]: string}}
+let git: IGitCommandManager & { env: { [key: string]: string } }
 let settings: IGitSourceSettings
 let sshPath: string
+let githubServerUrl: string
 
 describe('git-auth-helper tests', () => {
   beforeAll(async () => {
@@ -32,7 +33,7 @@ describe('git-auth-helper tests', () => {
 
   beforeEach(() => {
     // Mock setSecret
-    jest.spyOn(core, 'setSecret').mockImplementation((secret: string) => {})
+    jest.spyOn(core, 'setSecret').mockImplementation((secret: string) => { })
 
     // Mock error/warning/info/debug
     jest.spyOn(core, 'error').mockImplementation(jest.fn())
@@ -67,11 +68,15 @@ describe('git-auth-helper tests', () => {
     }
   })
 
-  const configureAuth_configuresAuthHeader =
-    'configureAuth configures auth header'
-  it(configureAuth_configuresAuthHeader, async () => {
+  async function testAuthHeader(testName: string, serverUrl: string | undefined = undefined) {
     // Arrange
-    await setup(configureAuth_configuresAuthHeader)
+    let expectedServerUrl = 'https://github.com'
+    if (serverUrl) {
+      githubServerUrl = serverUrl
+      expectedServerUrl = githubServerUrl
+    }
+
+    await setup(testName)
     expect(settings.authToken).toBeTruthy() // sanity check
     const authHelper = gitAuthHelper.createAuthHelper(git, settings)
 
@@ -88,9 +93,25 @@ describe('git-auth-helper tests', () => {
     ).toString('base64')
     expect(
       configContent.indexOf(
-        `http.https://github.com/.extraheader AUTHORIZATION: basic ${basicCredential}`
+        `http.${expectedServerUrl}/.extraheader AUTHORIZATION: basic ${basicCredential}`
       )
     ).toBeGreaterThanOrEqual(0)
+  }
+
+  const configureAuth_configuresAuthHeader =
+    'configureAuth configures auth header'
+  it(configureAuth_configuresAuthHeader, async () => {
+    await testAuthHeader(configureAuth_configuresAuthHeader);
+  })
+
+  const configureAuth_AcceptsGitHubServerUrl = 'inject https://my-ghes-server.com as github server url'
+  it(configureAuth_AcceptsGitHubServerUrl, async () => {
+    await testAuthHeader(configureAuth_AcceptsGitHubServerUrl, 'https://my-ghes-server.com');
+  })
+
+  const configureAuth_AcceptsGitHubServerUrlSetToGHEC = 'inject https://github.com as github server url'
+  it(configureAuth_AcceptsGitHubServerUrlSetToGHEC, async () => {
+    await testAuthHeader(configureAuth_AcceptsGitHubServerUrl, 'https://github.com');
   })
 
   const configureAuth_configuresAuthHeaderEvenWhenPersistCredentialsFalse =
@@ -678,9 +699,9 @@ async function setup(testName: string): Promise<void> {
   workspace = path.join(testWorkspace, testName, 'workspace')
   runnerTemp = path.join(testWorkspace, testName, 'runner-temp')
   tempHomedir = path.join(testWorkspace, testName, 'home-dir')
-  await fs.promises.mkdir(workspace, {recursive: true})
-  await fs.promises.mkdir(runnerTemp, {recursive: true})
-  await fs.promises.mkdir(tempHomedir, {recursive: true})
+  await fs.promises.mkdir(workspace, { recursive: true })
+  await fs.promises.mkdir(runnerTemp, { recursive: true })
+  await fs.promises.mkdir(tempHomedir, { recursive: true })
   process.env['RUNNER_TEMP'] = runnerTemp
   process.env['HOME'] = tempHomedir
 
@@ -688,7 +709,7 @@ async function setup(testName: string): Promise<void> {
   globalGitConfigPath = path.join(tempHomedir, '.gitconfig')
   await fs.promises.writeFile(globalGitConfigPath, '')
   localGitConfigPath = path.join(workspace, '.git', 'config')
-  await fs.promises.mkdir(path.dirname(localGitConfigPath), {recursive: true})
+  await fs.promises.mkdir(path.dirname(localGitConfigPath), { recursive: true })
   await fs.promises.writeFile(localGitConfigPath, '')
 
   git = {
@@ -779,7 +800,7 @@ async function setup(testName: string): Promise<void> {
     sshStrict: true,
     workflowOrganizationId: 123456,
     setSafeDirectory: true,
-    githubServerUrl: undefined
+    githubServerUrl: githubServerUrl
   }
 }