diff --git a/packages/docusaurus/src/server/__tests__/configValidation.test.ts b/packages/docusaurus/src/server/__tests__/configValidation.test.ts
index 008f71c71588..70eaa3900e3c 100644
--- a/packages/docusaurus/src/server/__tests__/configValidation.test.ts
+++ b/packages/docusaurus/src/server/__tests__/configValidation.test.ts
@@ -37,6 +37,7 @@ describe('normalizeConfig', () => {
       organizationName: 'facebook',
       projectName: 'docusaurus',
       githubHost: 'github.com',
+      githubPort: '8000',
       customFields: {
         myCustomField: '42',
       },