diff --git a/lib/extend/tag.js b/lib/extend/tag.js
index df66add124..ba8efef76e 100644
--- a/lib/extend/tag.js
+++ b/lib/extend/tag.js
@@ -69,7 +69,7 @@ function getContext(lines, errLine, location, type) {
   Array.prototype.push.apply(message,
     // get LINES_OF_CONTEXT lines surrounding `errLine`
     getContextLineNums(1, lines.length, errLine, LINES_OF_CONTEXT)
-      .map(function(lnNum) {
+      .map(lnNum => {
         const line = '  ' + lnNum + ' | ' + lines[lnNum - 1];
         if (lnNum === errLine) {
           return colorize.bold(line);
diff --git a/lib/plugins/tag/code.js b/lib/plugins/tag/code.js
index e7cfd8a614..69700a1c60 100644
--- a/lib/plugins/tag/code.js
+++ b/lib/plugins/tag/code.js
@@ -52,7 +52,7 @@ function getHighlightOptions(config, arg) {
   let mark = [];
   if (rMark.test(arg)) {
     arg = arg.replace(rMark, (match, _mark) => {
-      mark = _mark.split(',').reduce(function getMarkedLines(prev, cur) {
+      mark = _mark.split(',').reduce((prev, cur) => {
         if (/-/.test(cur)) {
           let a = Number(cur.substr(0, cur.indexOf('-')));
           let b = Number(cur.substr(cur.indexOf('-') + 1));
diff --git a/test/scripts/console/list_categories.js b/test/scripts/console/list_categories.js
index 822bc312a1..1519533356 100644
--- a/test/scripts/console/list_categories.js
+++ b/test/scripts/console/list_categories.js
@@ -13,7 +13,7 @@ describe('Console list', () => {
 
   before(() => {
     const log = console.log;
-    sinon.stub(console, 'log').callsFake(function(...args) {
+    sinon.stub(console, 'log').callsFake((...args) => {
       return log.apply(log, args);
     });
   });
diff --git a/test/scripts/console/list_page.js b/test/scripts/console/list_page.js
index d4f2afd1c5..96cd89a26d 100644
--- a/test/scripts/console/list_page.js
+++ b/test/scripts/console/list_page.js
@@ -12,7 +12,7 @@ describe('Console list', () => {
   hexo.config.permalink = ':title/';
   before(() => {
     const log = console.log;
-    sinon.stub(console, 'log').callsFake(function(...args) {
+    sinon.stub(console, 'log').callsFake((...args) => {
       return log.apply(log, args);
     });
   });
diff --git a/test/scripts/console/list_post.js b/test/scripts/console/list_post.js
index 96f424fdfb..6509e3751e 100644
--- a/test/scripts/console/list_post.js
+++ b/test/scripts/console/list_post.js
@@ -12,7 +12,7 @@ describe('Console list', () => {
 
   before(() => {
     const log = console.log;
-    sinon.stub(console, 'log').callsFake(function(...args) {
+    sinon.stub(console, 'log').callsFake((...args) => {
       return log.apply(log, args);
     });
   });
diff --git a/test/scripts/console/list_tags.js b/test/scripts/console/list_tags.js
index 50b38419f1..0b9d9247df 100644
--- a/test/scripts/console/list_tags.js
+++ b/test/scripts/console/list_tags.js
@@ -14,7 +14,7 @@ describe('Console list', () => {
   hexo.config.permalink = ':title/';
   before(() => {
     const log = console.log;
-    sinon.stub(console, 'log').callsFake(function(...args) {
+    sinon.stub(console, 'log').callsFake((...args) => {
       return log.apply(log, args);
     });
   });