diff --git a/lib/jasmine-core/example/node_example/lib/jasmine_examples/Player.js b/lib/jasmine-core/example/node_example/lib/jasmine_examples/Player.js
index fe95f8946..8a7bfbdc3 100644
--- a/lib/jasmine-core/example/node_example/lib/jasmine_examples/Player.js
+++ b/lib/jasmine-core/example/node_example/lib/jasmine_examples/Player.js
@@ -1,24 +1,24 @@
-function Player() {
-}
-Player.prototype.play = function(song) {
-  this.currentlyPlayingSong = song;
-  this.isPlaying = true;
-};
-
-Player.prototype.pause = function() {
-  this.isPlaying = false;
-};
+class Player {
+  play(song) {
+    this.currentlyPlayingSong = song;
+    this.isPlaying = true;
+  }
 
-Player.prototype.resume = function() {
-  if (this.isPlaying) {
-    throw new Error("song is already playing");
+  pause() {
+    this.isPlaying = false;
   }
 
-  this.isPlaying = true;
-};
+  resume() {
+    if (this.isPlaying) {
+      throw new Error('song is already playing');
+    }
 
-Player.prototype.makeFavorite = function() {
-  this.currentlyPlayingSong.persistFavoriteStatus(true);
-};
+    this.isPlaying = true;
+  }
+
+  makeFavorite() {
+    this.currentlyPlayingSong.persistFavoriteStatus(true);
+  }
+}
 
 module.exports = Player;
diff --git a/lib/jasmine-core/example/node_example/lib/jasmine_examples/Song.js b/lib/jasmine-core/example/node_example/lib/jasmine_examples/Song.js
index 3415bb821..f2757786f 100644
--- a/lib/jasmine-core/example/node_example/lib/jasmine_examples/Song.js
+++ b/lib/jasmine-core/example/node_example/lib/jasmine_examples/Song.js
@@ -1,9 +1,8 @@
-function Song() {
+class Song {
+  persistFavoriteStatus(value) {
+    // something complicated
+    throw new Error('not yet implemented');
+  }
 }
 
-Song.prototype.persistFavoriteStatus = function(value) {
-  // something complicated
-  throw new Error("not yet implemented");
-};
-
 module.exports = Song;
diff --git a/lib/jasmine-core/example/node_example/spec/helpers/jasmine_examples/SpecHelper.js b/lib/jasmine-core/example/node_example/spec/helpers/jasmine_examples/SpecHelper.js
index 578b3e862..cc04bd8db 100644
--- a/lib/jasmine-core/example/node_example/spec/helpers/jasmine_examples/SpecHelper.js
+++ b/lib/jasmine-core/example/node_example/spec/helpers/jasmine_examples/SpecHelper.js
@@ -3,11 +3,11 @@ beforeEach(function () {
     toBePlaying: function () {
       return {
         compare: function (actual, expected) {
-          var player = actual;
+          const player = actual;
 
           return {
             pass: player.currentlyPlayingSong === expected && player.isPlaying
-          }
+          };
         }
       };
     }
diff --git a/lib/jasmine-core/example/node_example/spec/jasmine_examples/PlayerSpec.js b/lib/jasmine-core/example/node_example/spec/jasmine_examples/PlayerSpec.js
index 80f149e3a..fa96ccc46 100644
--- a/lib/jasmine-core/example/node_example/spec/jasmine_examples/PlayerSpec.js
+++ b/lib/jasmine-core/example/node_example/spec/jasmine_examples/PlayerSpec.js
@@ -1,36 +1,37 @@
-describe("Player", function() {
-  var Player = require('../../lib/jasmine_examples/Player');
-  var Song = require('../../lib/jasmine_examples/Song');
-  var player;
-  var song;
+const Player = require('../../lib/jasmine_examples/Player');
+const Song = require('../../lib/jasmine_examples/Song');
+
+describe('Player', function() {
+  let player;
+  let song;
 
   beforeEach(function() {
     player = new Player();
     song = new Song();
   });
 
-  it("should be able to play a Song", function() {
+  it('should be able to play a Song', function() {
     player.play(song);
     expect(player.currentlyPlayingSong).toEqual(song);
 
-    //demonstrates use of custom matcher
+    // demonstrates use of custom matcher
     expect(player).toBePlaying(song);
   });
 
-  describe("when song has been paused", function() {
+  describe('when song has been paused', function() {
     beforeEach(function() {
       player.play(song);
       player.pause();
     });
 
-    it("should indicate that the song is currently paused", function() {
+    it('should indicate that the song is currently paused', function() {
       expect(player.isPlaying).toBeFalsy();
 
       // demonstrates use of 'not' with a custom matcher
       expect(player).not.toBePlaying(song);
     });
 
-    it("should be possible to resume", function() {
+    it('should be possible to resume', function() {
       player.resume();
       expect(player.isPlaying).toBeTruthy();
       expect(player.currentlyPlayingSong).toEqual(song);
@@ -38,7 +39,7 @@ describe("Player", function() {
   });
 
   // demonstrates use of spies to intercept and test method calls
-  it("tells the current song if the user has made it a favorite", function() {
+  it('tells the current song if the user has made it a favorite', function() {
     spyOn(song, 'persistFavoriteStatus');
 
     player.play(song);
@@ -48,13 +49,13 @@ describe("Player", function() {
   });
 
   //demonstrates use of expected exceptions
-  describe("#resume", function() {
-    it("should throw an exception if song is already playing", function() {
+  describe('#resume', function() {
+    it('should throw an exception if song is already playing', function() {
       player.play(song);
 
       expect(function() {
         player.resume();
-      }).toThrowError("song is already playing");
+      }).toThrowError('song is already playing');
     });
   });
 });
diff --git a/lib/jasmine-core/example/spec/PlayerSpec.js b/lib/jasmine-core/example/spec/PlayerSpec.js
index f17521fde..9617c4f4d 100644
--- a/lib/jasmine-core/example/spec/PlayerSpec.js
+++ b/lib/jasmine-core/example/spec/PlayerSpec.js
@@ -1,34 +1,34 @@
-describe("Player", function() {
-  var player;
-  var song;
+describe('Player', function() {
+  let player;
+  let song;
 
   beforeEach(function() {
     player = new Player();
     song = new Song();
   });
 
-  it("should be able to play a Song", function() {
+  it('should be able to play a Song', function() {
     player.play(song);
     expect(player.currentlyPlayingSong).toEqual(song);
 
-    //demonstrates use of custom matcher
+    // demonstrates use of custom matcher
     expect(player).toBePlaying(song);
   });
 
-  describe("when song has been paused", function() {
+  describe('when song has been paused', function() {
     beforeEach(function() {
       player.play(song);
       player.pause();
     });
 
-    it("should indicate that the song is currently paused", function() {
+    it('should indicate that the song is currently paused', function() {
       expect(player.isPlaying).toBeFalsy();
 
       // demonstrates use of 'not' with a custom matcher
       expect(player).not.toBePlaying(song);
     });
 
-    it("should be possible to resume", function() {
+    it('should be possible to resume', function() {
       player.resume();
       expect(player.isPlaying).toBeTruthy();
       expect(player.currentlyPlayingSong).toEqual(song);
@@ -36,7 +36,7 @@ describe("Player", function() {
   });
 
   // demonstrates use of spies to intercept and test method calls
-  it("tells the current song if the user has made it a favorite", function() {
+  it('tells the current song if the user has made it a favorite', function() {
     spyOn(song, 'persistFavoriteStatus');
 
     player.play(song);
@@ -46,13 +46,13 @@ describe("Player", function() {
   });
 
   //demonstrates use of expected exceptions
-  describe("#resume", function() {
-    it("should throw an exception if song is already playing", function() {
+  describe('#resume', function() {
+    it('should throw an exception if song is already playing', function() {
       player.play(song);
 
       expect(function() {
         player.resume();
-      }).toThrowError("song is already playing");
+      }).toThrowError('song is already playing');
     });
   });
 });
diff --git a/lib/jasmine-core/example/spec/SpecHelper.js b/lib/jasmine-core/example/spec/SpecHelper.js
index 126752d1e..cc04bd8db 100644
--- a/lib/jasmine-core/example/spec/SpecHelper.js
+++ b/lib/jasmine-core/example/spec/SpecHelper.js
@@ -3,7 +3,7 @@ beforeEach(function () {
     toBePlaying: function () {
       return {
         compare: function (actual, expected) {
-          var player = actual;
+          const player = actual;
 
           return {
             pass: player.currentlyPlayingSong === expected && player.isPlaying
diff --git a/lib/jasmine-core/example/src/Player.js b/lib/jasmine-core/example/src/Player.js
index 118519669..f2fae6f7c 100644
--- a/lib/jasmine-core/example/src/Player.js
+++ b/lib/jasmine-core/example/src/Player.js
@@ -1,22 +1,22 @@
-function Player() {
-}
-Player.prototype.play = function(song) {
-  this.currentlyPlayingSong = song;
-  this.isPlaying = true;
-};
-
-Player.prototype.pause = function() {
-  this.isPlaying = false;
-};
+class Player {
+  play(song) {
+    this.currentlyPlayingSong = song;
+    this.isPlaying = true;
+  }
 
-Player.prototype.resume = function() {
-  if (this.isPlaying) {
-    throw new Error("song is already playing");
+  pause() {
+    this.isPlaying = false;
   }
 
-  this.isPlaying = true;
-};
+  resume() {
+    if (this.isPlaying) {
+      throw new Error('song is already playing');
+    }
 
-Player.prototype.makeFavorite = function() {
-  this.currentlyPlayingSong.persistFavoriteStatus(true);
-};
+    this.isPlaying = true;
+  }
+
+  makeFavorite() {
+    this.currentlyPlayingSong.persistFavoriteStatus(true);
+  }
+}
diff --git a/lib/jasmine-core/example/src/Song.js b/lib/jasmine-core/example/src/Song.js
index 02527cb16..8914793b0 100644
--- a/lib/jasmine-core/example/src/Song.js
+++ b/lib/jasmine-core/example/src/Song.js
@@ -1,7 +1,6 @@
-function Song() {
+class Song {
+  persistFavoriteStatus(value) {
+    // something complicated
+    throw new Error('not yet implemented');
+  }
 }
-
-Song.prototype.persistFavoriteStatus = function(value) {
-  // something complicated
-  throw new Error("not yet implemented");
-};