diff --git a/lib/wasi.js b/lib/wasi.js
index eef36d24d487e7..ea2e2b794b22d7 100644
--- a/lib/wasi.js
+++ b/lib/wasi.js
@@ -2,10 +2,10 @@
 /* global WebAssembly */
 const {
   ArrayIsArray,
-  ArrayPrototypeForEach,
   ArrayPrototypeMap,
+  ArrayPrototypePush,
   FunctionPrototypeBind,
-  ObjectKeys,
+  ObjectEntries,
   Symbol,
 } = primordials;
 const {
@@ -39,7 +39,7 @@ class WASI {
       for (const key in env) {
         const value = env[key];
         if (value !== undefined)
-          envPairs.push(`${key}=${value}`);
+          ArrayPrototypePush(envPairs, `${key}=${value}`);
       }
     } else if (env !== undefined) {
       throw new ERR_INVALID_ARG_TYPE('options.env', 'Object', env);
@@ -48,10 +48,9 @@ class WASI {
     const preopenArray = [];
 
     if (typeof preopens === 'object' && preopens !== null) {
-      ArrayPrototypeForEach(ObjectKeys(preopens), (key) => {
-        preopenArray.push(String(key));
-        preopenArray.push(String(preopens[key]));
-      });
+      for (const [key, value] of ObjectEntries(preopens)) {
+        ArrayPrototypePush(preopenArray, String(key), String(value));
+      }
     } else if (preopens !== undefined) {
       throw new ERR_INVALID_ARG_TYPE('options.preopens', 'Object', preopens);
     }