diff --git a/package.json b/package.json
index 2a8244b25ce..8f347b9314b 100644
--- a/package.json
+++ b/package.json
@@ -370,7 +370,7 @@
 		"pretest": "npm run compile",
 		"dev": "cd webview-ui && npm run dev",
 		"test": "node scripts/run-tests.js",
-		"test:extension": "jest",
+		"test:extension": "jest -w=40%",
 		"test:webview": "cd webview-ui && npm run test",
 		"prepare": "husky",
 		"publish:marketplace": "vsce publish && ovsx publish",
diff --git a/webview-ui/package.json b/webview-ui/package.json
index 5dd9f999e36..8267a7e918c 100644
--- a/webview-ui/package.json
+++ b/webview-ui/package.json
@@ -7,7 +7,7 @@
 		"lint": "eslint src/**/*.ts src/**/*.tsx",
 		"lint-fix": "eslint src/**/*.ts src/**/*.tsx --fix",
 		"check-types": "tsc",
-		"test": "jest",
+		"test": "jest -w=40%",
 		"dev": "vite",
 		"tsc": "tsc -b",
 		"vite-build": "vite build",