diff --git a/lib/command-exists.js b/lib/command-exists.js
index 2230e18..7c37ca3 100644
--- a/lib/command-exists.js
+++ b/lib/command-exists.js
@@ -62,7 +62,8 @@ var commandExistsUnix = function(commandName, cleanedCommandName, callback) {
 }
 
 var commandExistsWindows = function(commandName, cleanedCommandName, callback) {
-  if (/[\x00-\x1f<>:"\|\?\*]/.test(commandName)) {
+  // Regex from Julio from: https://stackoverflow.com/questions/51494579/regex-windows-path-validator
+  if (!(/^(?!(?:.*\s|.*\.|\W+)$)(?:[a-zA-Z]:)?(?:(?:[^<>:"\|\?\*\n])+(?:\/\/|\/|\\\\|\\)?)+$/m.test(commandName))) {
     callback(null, false);
     return;
   }
@@ -93,7 +94,8 @@ var commandExistsUnixSync = function(commandName, cleanedCommandName) {
 }
 
 var commandExistsWindowsSync = function(commandName, cleanedCommandName, callback) {
-  if (/[\x00-\x1f<>:"\|\?\*]/.test(commandName)) {
+  // Regex from Julio from: https://stackoverflow.com/questions/51494579/regex-windows-path-validator
+  if (!(/^(?!(?:.*\s|.*\.|\W+)$)(?:[a-zA-Z]:)?(?:(?:[^<>:"\|\?\*\n])+(?:\/\/|\/|\\\\|\\)?)+$/m.test(commandName))) {
     return false;
   }
   try {
diff --git a/test/test.js b/test/test.js
index 89ee1ba..34670e6 100644
--- a/test/test.js
+++ b/test/test.js
@@ -3,14 +3,15 @@
 var expect = require('expect.js');
 var commandExists = require('..');
 var commandExistsSync = commandExists.sync;
+var resolve = require('path').resolve;
 var isUsingWindows = process.platform == 'win32'
 
 describe('commandExists', function(){
     describe('async - callback', function() {
-        it('it should find a command named ls or dir', function(done){
+        it('it should find a command named ls or xcopy', function(done){
             var commandToUse = 'ls'
             if (isUsingWindows) {
-                commandToUse = 'dir'
+                commandToUse = 'xcopy'
             }
 
             commandExists(commandToUse, function(err, exists) {
@@ -30,10 +31,10 @@ describe('commandExists', function(){
     });
 
     describe('async - promise', function() {
-        it('it should find a command named ls or dir', function(done){
+        it('it should find a command named ls or xcopy', function(done){
             var commandToUse = 'ls'
             if (isUsingWindows) {
-                commandToUse = 'dir'
+                commandToUse = 'xcopy'
             }
 
             commandExists(commandToUse)
@@ -56,10 +57,10 @@ describe('commandExists', function(){
     });
 
     describe('sync', function() {
-        it('it should find a command named ls or dir', function(){
+        it('it should find a command named ls or xcopy', function(){
             var commandToUse = 'ls'
             if (isUsingWindows) {
-                commandToUse = 'dir'
+                commandToUse = 'xcopy'
             }
             expect(commandExistsSync(commandToUse)).to.be(true);
         });
@@ -68,10 +69,10 @@ describe('commandExists', function(){
             expect(commandExistsSync('fdsafdsafdsafdsafdsa')).to.be(false);
         });
 
-        it('it should not find a command named ls or dir prefixed with some nonsense', function(){
+        it('it should not find a command named ls or xcopy prefixed with some nonsense', function(){
             var commandToUse = 'fdsafdsa ls'
             if (isUsingWindows) {
-                commandToUse = 'fdsafdsaf dir'
+                commandToUse = 'fdsafdsaf xcopy'
             }
             expect(commandExistsSync(commandToUse)).to.be(false);
         });
@@ -127,4 +128,20 @@ describe('commandExists', function(){
             });
         }
     });
+
+    describe('absolute path', function() {
+        it('it should report true if there is a command with that name in absolute path', function(done) {
+            var commandToUse = resolve('test/executable-script.js');
+            commandExists(commandToUse)
+            .then(function(command){
+                expect(command).to.be(commandToUse);
+                done();
+            });
+        });
+        
+        it('it should report false if there is not a command with that name in absolute path', function() {
+            var commandToUse = resolve('executable-script.js');
+            expect(commandExists.sync(commandToUse)).to.be(false);
+        });
+    });
 });