diff --git a/docs/core-concepts/1203-client.md b/docs/core-concepts/1203-client.md
index 0655651a..78151611 100644
--- a/docs/core-concepts/1203-client.md
+++ b/docs/core-concepts/1203-client.md
@@ -32,7 +32,7 @@ You can use a local socket in an action:
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 
-<Tabs defaultValue="unix" groupId="client-env">
+<Tabs defaultValue={window.navigator.userAgent.indexOf('Win') != -1 ? 'windows': 'unix'} groupId="client-env">
 
 <TabItem value="unix" label="Linux/macOS">
 
diff --git a/docs/getting-started/1200-local-dev.md b/docs/getting-started/1200-local-dev.md
index 45f8a556..f1ab70d5 100644
--- a/docs/getting-started/1200-local-dev.md
+++ b/docs/getting-started/1200-local-dev.md
@@ -12,7 +12,10 @@ Within 5 minutes, you will have a local CI/CD loop and run your first test & bui
 
 import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem';
 
-<Tabs defaultValue="macos"
+<Tabs defaultValue={
+	window.navigator.userAgent.indexOf('Linux') != -1 ? 'linux':
+	window.navigator.userAgent.indexOf('Win') != -1 ? 'windows':
+	'macos'}
 groupId="os"
 values={[
 {label: 'macOS', value: 'macos'}, {label: 'Linux', value: 'linux'}, {label: 'Windows', value: 'windows'},