diff --git a/index.js b/index.js
index 41088f6c..3d65758a 100644
--- a/index.js
+++ b/index.js
@@ -227,7 +227,7 @@ function parse (args, opts) {
       next = args[i + 1]
       key = arg.match(/^-(.\..+)/)[1]
 
-      if(!configuration['ignore-unknown-options'] || hasAnyFlag(key)) {
+      if (!configuration['ignore-unknown-options'] || hasAnyFlag(key)) {
         if (next !== undefined && !next.match(/^-/) &&
           !checkAllAliases(key, flags.bools) &&
           !checkAllAliases(key, flags.counts)) {
@@ -242,7 +242,7 @@ function parse (args, opts) {
     } else if (arg.match(/^-[^-]+/) && !arg.match(negative)) {
       letters = arg.slice(1, -1).split('')
       broken = false
-      unmatched = []
+      let unmatched = []
 
       for (var j = 0; j < letters.length; j++) {
         next = arg.slice(j + 2)
@@ -262,9 +262,9 @@ function parse (args, opts) {
           } else if (!configuration['ignore-unknown-options'] || hasAnyFlag(key)) {
             setArg(key, value)
           } else {
-            unmatched.push(key);
-            unmatched.push('=');
-            unmatched.push(value);
+            unmatched.push(key)
+            unmatched.push('=')
+            unmatched.push(value)
           }
 
           broken = true
@@ -275,8 +275,8 @@ function parse (args, opts) {
           if (!configuration['ignore-unknown-options'] || hasAnyFlag(letters[j])) {
             setArg(letters[j], next)
           } else {
-            unmatched.push(letters[j]);
-            unmatched.push(next);
+            unmatched.push(letters[j])
+            unmatched.push(next)
           }
           continue
         }
@@ -287,8 +287,8 @@ function parse (args, opts) {
           if (!configuration['ignore-unknown-options'] || hasAnyFlag(letters[j])) {
             setArg(letters[j], next)
           } else {
-            unmatched.push(letters[j]);
-            unmatched.push(next);
+            unmatched.push(letters[j])
+            unmatched.push(next)
           }
           broken = true
           break
@@ -298,8 +298,8 @@ function parse (args, opts) {
           if (!configuration['ignore-unknown-options'] || hasAnyFlag(letters[j])) {
             setArg(letters[j], next)
           } else {
-            unmatched.push(letters[j]);
-            unmatched.push(next);
+            unmatched.push(letters[j])
+            unmatched.push(next)
           }
           broken = true
           break
@@ -335,7 +335,7 @@ function parse (args, opts) {
             setArg(key, defaultValue(key))
           }
         } else {
-          unmatched.push(key);
+          unmatched.push(key)
         }
       }
       if (unmatched.length > 0) {
@@ -805,7 +805,7 @@ function parse (args, opts) {
 
     return isSet
   }
-  
+
   function hasAnyFlag (key) {
     var isSet = false
     var toCheck = [].concat(Object.values(flags))
diff --git a/test/yargs-parser.js b/test/yargs-parser.js
index af74a19d..c4f890b8 100644
--- a/test/yargs-parser.js
+++ b/test/yargs-parser.js
@@ -3040,7 +3040,7 @@ describe('yargs-parser', function () {
       })
       argv.should.deep.equal({
         _: ['-u=2'],
-        'k':  1
+        'k': 1
       })
     })
     it('should ignore unknown options in short format followed by hyphen', function () {
@@ -3052,7 +3052,7 @@ describe('yargs-parser', function () {
       })
       argv.should.deep.equal({
         _: ['-u-'],
-        'k':  '-'
+        'k': '-'
       })
     })
     it('should ignore unknown options in short format separated by space', function () {
@@ -3064,7 +3064,7 @@ describe('yargs-parser', function () {
       })
       argv.should.deep.equal({
         _: ['-u', 2],
-        'k':  1
+        'k': 1
       })
     })
     it('should ignore unknown options in short format followed by a number', function () {
@@ -3076,7 +3076,7 @@ describe('yargs-parser', function () {
       })
       argv.should.deep.equal({
         _: ['-u2'],
-        'k':  1
+        'k': 1
       })
     })
     it('should ignore unknown options in short format followed by a non-word character', function () {
@@ -3088,7 +3088,7 @@ describe('yargs-parser', function () {
       })
       argv.should.deep.equal({
         _: ['-u/2/'],
-        'k':  '/1/'
+        'k': '/1/'
       })
     })
   })
@@ -3101,7 +3101,7 @@ describe('yargs-parser', function () {
     })
     argv.should.deep.equal({
       _: ['-u'],
-      'k':  true,
+      'k': true,
       'v': true
     })
     it('should ignore unknown options in short format with multiple flags in one argument where an unknown flag is at the end', function () {
@@ -3113,7 +3113,7 @@ describe('yargs-parser', function () {
       })
       argv.should.deep.equal({
         _: ['-u'],
-        'k':  true,
+        'k': true,
         'v': true
       })
     })