diff --git a/extensions/microsoft-authentication/src/AADHelper.ts b/extensions/microsoft-authentication/src/AADHelper.ts
index 24599f62b22..670ebc6a0ce 100644
--- a/extensions/microsoft-authentication/src/AADHelper.ts
+++ b/extensions/microsoft-authentication/src/AADHelper.ts
@@ -339,7 +339,7 @@ export class AzureActiveDirectoryService {
 	}
 
 	private getCallbackEnvironment(callbackUri: vscode.Uri): string {
-		if (callbackUri.authority.endsWith('.workspaces.github.com')) {
+		if (callbackUri.authority.endsWith('.workspaces.github.com') || callbackUri.authority.endsWith('.github.dev')) {
 			return `${callbackUri.authority},`;
 		}