diff --git a/packages/runtime-test/src/serialize.ts b/packages/runtime-test/src/serialize.ts
index 72ed03d2..57a3e7a5 100644
--- a/packages/runtime-test/src/serialize.ts
+++ b/packages/runtime-test/src/serialize.ts
@@ -42,7 +42,7 @@ function serializeElement(
       const value = node.props[key]
       return isOn(key) || value == null ? `` : `${key}=${JSON.stringify(value)}`
     })
-    .filter(_ => _)
+    .filter(Boolean)
     .join(' ')
   const padding = indent ? ` `.repeat(indent).repeat(depth) : ``
   return (
diff --git a/scripts/build.js b/scripts/build.js
index 9bc27c60..2e576d7a 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -68,7 +68,7 @@ async function build(target) {
         args.types ? `TYPES:true` : ``,
         prodOnly ? `PROD_ONLY:true` : ``
       ]
-        .filter(_ => _)
+        .filter(Boolean)
         .join(',')
     ],
     { stdio: 'inherit' }