diff --git a/lib/filesystem.js b/lib/filesystem.js
index d45f513..0b2ea84 100755
--- a/lib/filesystem.js
+++ b/lib/filesystem.js
@@ -491,7 +491,7 @@ function fsStats(callback) {
   return new Promise((resolve) => {
     process.nextTick(() => {
       if (_windows) {
-        resolve(null);
+        return resolve(null);
       }
 
       let result = {
@@ -633,10 +633,10 @@ function disksIO(callback) {
   return new Promise((resolve) => {
     process.nextTick(() => {
       if (_windows) {
-        resolve(null);
+        return resolve(null);
       }
       if (_sunos) {
-        resolve(null);
+        return resolve(null);
       }
 
       let result = {