diff --git a/services/chat/test/acceptance/coffee/DeletingAMessageTests.js b/services/chat/test/acceptance/coffee/DeletingAMessageTests.js
index 7d6ca8b00b..0969d522cf 100644
--- a/services/chat/test/acceptance/coffee/DeletingAMessageTests.js
+++ b/services/chat/test/acceptance/coffee/DeletingAMessageTests.js
@@ -1,32 +1,48 @@
-{ObjectId} = require "../../../app/js/mongojs"
-expect = require("chai").expect
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const {ObjectId} = require("../../../app/js/mongojs");
+const { expect } = require("chai");
 
-ChatClient = require "./helpers/ChatClient"
-ChatApp = require "./helpers/ChatApp"
+const ChatClient = require("./helpers/ChatClient");
+const ChatApp = require("./helpers/ChatApp");
 
-describe "Deleting a message", ->
-	before (done) ->
-		@project_id = ObjectId().toString()
-		@user_id = ObjectId().toString()
-		@thread_id = ObjectId().toString()
-		ChatApp.ensureRunning done
+describe("Deleting a message", function() {
+	before(function(done) {
+		this.project_id = ObjectId().toString();
+		this.user_id = ObjectId().toString();
+		this.thread_id = ObjectId().toString();
+		return ChatApp.ensureRunning(done);
+	});
 
-	describe "in a thread", ->
-		before (done) ->
-			ChatClient.sendMessage @project_id, @thread_id, @user_id, "first message", (error, response, @message) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 201
-				ChatClient.sendMessage @project_id, @thread_id, @user_id, "deleted message", (error, response, @message) =>
-					expect(error).to.be.null
-					expect(response.statusCode).to.equal 201
-					ChatClient.deleteMessage @project_id, @thread_id, @message.id, (error, response, body) =>
-						expect(error).to.be.null
-						expect(response.statusCode).to.equal 204
-						done()
+	return describe("in a thread", function() {
+		before(function(done) {
+			return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, "first message", (error, response, message) => {
+				this.message = message;
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(201);
+				return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, "deleted message", (error, response, message1) => {
+					this.message = message1;
+					expect(error).to.be.null;
+					expect(response.statusCode).to.equal(201);
+					return ChatClient.deleteMessage(this.project_id, this.thread_id, this.message.id, (error, response, body) => {
+						expect(error).to.be.null;
+						expect(response.statusCode).to.equal(204);
+						return done();
+					});
+				});
+			});
+		});
 		
-		it "should then remove the message from the threads", (done) ->
-			ChatClient.getThreads @project_id, (error, response, threads) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(threads[@thread_id].messages.length).to.equal 1
-				done()
\ No newline at end of file
+		return it("should then remove the message from the threads", function(done) {
+			return ChatClient.getThreads(this.project_id, (error, response, threads) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(threads[this.thread_id].messages.length).to.equal(1);
+				return done();
+			});
+		});
+	});
+});
\ No newline at end of file
diff --git a/services/chat/test/acceptance/coffee/DeletingAThreadTests.js b/services/chat/test/acceptance/coffee/DeletingAThreadTests.js
index a803e730c7..843134bbd8 100644
--- a/services/chat/test/acceptance/coffee/DeletingAThreadTests.js
+++ b/services/chat/test/acceptance/coffee/DeletingAThreadTests.js
@@ -1,31 +1,44 @@
-{ObjectId} = require "../../../app/js/mongojs"
-expect = require("chai").expect
-crypto = require "crypto"
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const {ObjectId} = require("../../../app/js/mongojs");
+const { expect } = require("chai");
+const crypto = require("crypto");
 
-ChatClient = require "./helpers/ChatClient"
-ChatApp = require "./helpers/ChatApp"
+const ChatClient = require("./helpers/ChatClient");
+const ChatApp = require("./helpers/ChatApp");
 
-describe "Deleting a thread", ->
-	before (done) ->
-		@project_id = ObjectId().toString()
-		@user_id = ObjectId().toString()
-		ChatApp.ensureRunning done
+describe("Deleting a thread", function() {
+	before(function(done) {
+		this.project_id = ObjectId().toString();
+		this.user_id = ObjectId().toString();
+		return ChatApp.ensureRunning(done);
+	});
 
-	describe "with a thread that is deleted", ->
-		before (done) ->
-			@thread_id = ObjectId().toString()
-			@content = "deleted thread message"
-			ChatClient.sendMessage @project_id, @thread_id, @user_id, @content, (error, response, body) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 201
-				ChatClient.deleteThread @project_id, @thread_id, (error, response, body) =>
-					expect(error).to.be.null
-					expect(response.statusCode).to.equal 204
-					done()
+	return describe("with a thread that is deleted", function() {
+		before(function(done) {
+			this.thread_id = ObjectId().toString();
+			this.content = "deleted thread message";
+			return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, this.content, (error, response, body) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(201);
+				return ChatClient.deleteThread(this.project_id, this.thread_id, (error, response, body) => {
+					expect(error).to.be.null;
+					expect(response.statusCode).to.equal(204);
+					return done();
+				});
+			});
+		});
 		
-		it "should then not list the thread for the project", (done) ->
-			ChatClient.getThreads @project_id, (error, response, threads) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(Object.keys(threads).length).to.equal 0
-				done()
+		return it("should then not list the thread for the project", function(done) {
+			return ChatClient.getThreads(this.project_id, (error, response, threads) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(Object.keys(threads).length).to.equal(0);
+				return done();
+			});
+		});
+	});
+});
diff --git a/services/chat/test/acceptance/coffee/EditingAMessageTests.js b/services/chat/test/acceptance/coffee/EditingAMessageTests.js
index f507e4b205..03bbbeab0a 100644
--- a/services/chat/test/acceptance/coffee/EditingAMessageTests.js
+++ b/services/chat/test/acceptance/coffee/EditingAMessageTests.js
@@ -1,34 +1,49 @@
-{ObjectId} = require "../../../app/js/mongojs"
-expect = require("chai").expect
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const {ObjectId} = require("../../../app/js/mongojs");
+const { expect } = require("chai");
 
-ChatClient = require "./helpers/ChatClient"
-ChatApp = require "./helpers/ChatApp"
+const ChatClient = require("./helpers/ChatClient");
+const ChatApp = require("./helpers/ChatApp");
 
-describe "Editing a message", ->
-	before (done) ->
-		@project_id = ObjectId().toString()
-		@user_id = ObjectId().toString()
-		@thread_id = ObjectId().toString()
-		ChatApp.ensureRunning done
+describe("Editing a message", function() {
+	before(function(done) {
+		this.project_id = ObjectId().toString();
+		this.user_id = ObjectId().toString();
+		this.thread_id = ObjectId().toString();
+		return ChatApp.ensureRunning(done);
+	});
 
-	describe "in a thread", ->
-		before (done) ->
-			@content = "thread message"
-			@new_content = "updated thread message"
-			ChatClient.sendMessage @project_id, @thread_id, @user_id, @content, (error, response, @message) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 201
-				expect(@message.id).to.exist
-				expect(@message.content).to.equal @content
-				ChatClient.editMessage @project_id, @thread_id, @message.id, @new_content, (error, response, @new_message) =>
-					expect(error).to.be.null
-					expect(response.statusCode).to.equal 204
-					done()
+	return describe("in a thread", function() {
+		before(function(done) {
+			this.content = "thread message";
+			this.new_content = "updated thread message";
+			return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, this.content, (error, response, message) => {
+				this.message = message;
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(201);
+				expect(this.message.id).to.exist;
+				expect(this.message.content).to.equal(this.content);
+				return ChatClient.editMessage(this.project_id, this.thread_id, this.message.id, this.new_content, (error, response, new_message) => {
+					this.new_message = new_message;
+					expect(error).to.be.null;
+					expect(response.statusCode).to.equal(204);
+					return done();
+				});
+			});
+		});
 		
-		it "should then list the updated message in the threads", (done) ->
-			ChatClient.getThreads @project_id, (error, response, threads) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(threads[@thread_id].messages.length).to.equal 1
-				expect(threads[@thread_id].messages[0].content).to.equal @new_content
-				done()
\ No newline at end of file
+		return it("should then list the updated message in the threads", function(done) {
+			return ChatClient.getThreads(this.project_id, (error, response, threads) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(threads[this.thread_id].messages.length).to.equal(1);
+				expect(threads[this.thread_id].messages[0].content).to.equal(this.new_content);
+				return done();
+			});
+		});
+	});
+});
\ No newline at end of file
diff --git a/services/chat/test/acceptance/coffee/GettingMessagesTests.js b/services/chat/test/acceptance/coffee/GettingMessagesTests.js
index b0c872e5cd..a2d3c81df6 100644
--- a/services/chat/test/acceptance/coffee/GettingMessagesTests.js
+++ b/services/chat/test/acceptance/coffee/GettingMessagesTests.js
@@ -1,64 +1,79 @@
-{ObjectId} = require "../../../app/js/mongojs"
-expect = require("chai").expect
-async = require "async"
-crypto = require "crypto"
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const {ObjectId} = require("../../../app/js/mongojs");
+const { expect } = require("chai");
+const async = require("async");
+const crypto = require("crypto");
 
-ChatClient = require "./helpers/ChatClient"
-ChatApp = require "./helpers/ChatApp"
+const ChatClient = require("./helpers/ChatClient");
+const ChatApp = require("./helpers/ChatApp");
 
-describe "Getting messages", ->
-	before (done) ->
-		@user_id1 = ObjectId().toString()
-		@user_id2 = ObjectId().toString()
-		@content1 = "foo bar"
-		@content2 = "hello world"
-		ChatApp.ensureRunning done
+describe("Getting messages", function() {
+	before(function(done) {
+		this.user_id1 = ObjectId().toString();
+		this.user_id2 = ObjectId().toString();
+		this.content1 = "foo bar";
+		this.content2 = "hello world";
+		return ChatApp.ensureRunning(done);
+	});
 
-	describe "globally", ->
-		before (done) ->
-			@project_id = ObjectId().toString()
-			async.series [
-				(cb) => ChatClient.sendGlobalMessage @project_id, @user_id1, @content1, cb
-				(cb) => ChatClient.sendGlobalMessage @project_id, @user_id2, @content2, cb
-			], done
+	describe("globally", function() {
+		before(function(done) {
+			this.project_id = ObjectId().toString();
+			return async.series([
+				cb => ChatClient.sendGlobalMessage(this.project_id, this.user_id1, this.content1, cb),
+				cb => ChatClient.sendGlobalMessage(this.project_id, this.user_id2, this.content2, cb)
+			], done);
+		});
 		
-		it "should contain the messages and populated users when getting the messages", (done) ->
-			ChatClient.getGlobalMessages @project_id, (error, response, messages) =>
-				expect(messages.length).to.equal 2
-				messages.reverse()
-				expect(messages[0].content).to.equal @content1
-				expect(messages[0].user_id).to.equal @user_id1
-				expect(messages[1].content).to.equal @content2
-				expect(messages[1].user_id).to.equal @user_id2
-				done()
+		return it("should contain the messages and populated users when getting the messages", function(done) {
+			return ChatClient.getGlobalMessages(this.project_id, (error, response, messages) => {
+				expect(messages.length).to.equal(2);
+				messages.reverse();
+				expect(messages[0].content).to.equal(this.content1);
+				expect(messages[0].user_id).to.equal(this.user_id1);
+				expect(messages[1].content).to.equal(this.content2);
+				expect(messages[1].user_id).to.equal(this.user_id2);
+				return done();
+			});
+		});
+	});
 
-	describe "from all the threads", ->
-		before (done) ->
-			@project_id = ObjectId().toString()
-			@thread_id1 = ObjectId().toString()
-			@thread_id2 = ObjectId().toString()
-			async.series [
-				(cb) => ChatClient.sendMessage @project_id, @thread_id1, @user_id1, "one", cb
-				(cb) => ChatClient.sendMessage @project_id, @thread_id2, @user_id2, "two", cb
-				(cb) => ChatClient.sendMessage @project_id, @thread_id1, @user_id1, "three", cb
-				(cb) => ChatClient.sendMessage @project_id, @thread_id2, @user_id2, "four", cb
-			], done
+	return describe("from all the threads", function() {
+		before(function(done) {
+			this.project_id = ObjectId().toString();
+			this.thread_id1 = ObjectId().toString();
+			this.thread_id2 = ObjectId().toString();
+			return async.series([
+				cb => ChatClient.sendMessage(this.project_id, this.thread_id1, this.user_id1, "one", cb),
+				cb => ChatClient.sendMessage(this.project_id, this.thread_id2, this.user_id2, "two", cb),
+				cb => ChatClient.sendMessage(this.project_id, this.thread_id1, this.user_id1, "three", cb),
+				cb => ChatClient.sendMessage(this.project_id, this.thread_id2, this.user_id2, "four", cb)
+			], done);
+		});
 		
-		it "should contain a dictionary of threads with messages with populated users", (done) ->
-			ChatClient.getThreads @project_id, (error, response, threads) =>
-				expect(Object.keys(threads).length).to.equal 2
-				thread1 = threads[@thread_id1]
-				expect(thread1.messages.length).to.equal 2
-				thread2 = threads[@thread_id2]
-				expect(thread2.messages.length).to.equal 2
+		return it("should contain a dictionary of threads with messages with populated users", function(done) {
+			return ChatClient.getThreads(this.project_id, (error, response, threads) => {
+				expect(Object.keys(threads).length).to.equal(2);
+				const thread1 = threads[this.thread_id1];
+				expect(thread1.messages.length).to.equal(2);
+				const thread2 = threads[this.thread_id2];
+				expect(thread2.messages.length).to.equal(2);
 				
-				expect(thread1.messages[0].content).to.equal "one"
-				expect(thread1.messages[0].user_id).to.equal @user_id1
-				expect(thread1.messages[1].content).to.equal "three"
-				expect(thread1.messages[1].user_id).to.equal @user_id1
+				expect(thread1.messages[0].content).to.equal("one");
+				expect(thread1.messages[0].user_id).to.equal(this.user_id1);
+				expect(thread1.messages[1].content).to.equal("three");
+				expect(thread1.messages[1].user_id).to.equal(this.user_id1);
 
-				expect(thread2.messages[0].content).to.equal "two"
-				expect(thread2.messages[0].user_id).to.equal @user_id2
-				expect(thread2.messages[1].content).to.equal "four"
-				expect(thread2.messages[1].user_id).to.equal @user_id2
-				done()
+				expect(thread2.messages[0].content).to.equal("two");
+				expect(thread2.messages[0].user_id).to.equal(this.user_id2);
+				expect(thread2.messages[1].content).to.equal("four");
+				expect(thread2.messages[1].user_id).to.equal(this.user_id2);
+				return done();
+			});
+		});
+	});
+});
diff --git a/services/chat/test/acceptance/coffee/ResolvingAThreadTests.js b/services/chat/test/acceptance/coffee/ResolvingAThreadTests.js
index d162f881f6..bad9b5feef 100644
--- a/services/chat/test/acceptance/coffee/ResolvingAThreadTests.js
+++ b/services/chat/test/acceptance/coffee/ResolvingAThreadTests.js
@@ -1,72 +1,97 @@
-{ObjectId} = require "../../../app/js/mongojs"
-expect = require("chai").expect
-crypto = require "crypto"
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const {ObjectId} = require("../../../app/js/mongojs");
+const { expect } = require("chai");
+const crypto = require("crypto");
 
-ChatClient = require "./helpers/ChatClient"
-ChatApp = require "./helpers/ChatApp"
+const ChatClient = require("./helpers/ChatClient");
+const ChatApp = require("./helpers/ChatApp");
 
-describe "Resolving a thread", ->
-	before (done) ->
-		@project_id = ObjectId().toString()
-		@user_id = ObjectId().toString()
-		ChatApp.ensureRunning done
+describe("Resolving a thread", function() {
+	before(function(done) {
+		this.project_id = ObjectId().toString();
+		this.user_id = ObjectId().toString();
+		return ChatApp.ensureRunning(done);
+	});
 
-	describe "with a resolved thread", ->
-		before (done) ->
-			@thread_id = ObjectId().toString()
-			@content = "resolved message"
-			ChatClient.sendMessage @project_id, @thread_id, @user_id, @content, (error, response, body) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 201
-				ChatClient.resolveThread @project_id, @thread_id, @user_id, (error, response, body) =>
-					expect(error).to.be.null
-					expect(response.statusCode).to.equal 204
-					done()
+	describe("with a resolved thread", function() {
+		before(function(done) {
+			this.thread_id = ObjectId().toString();
+			this.content = "resolved message";
+			return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, this.content, (error, response, body) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(201);
+				return ChatClient.resolveThread(this.project_id, this.thread_id, this.user_id, (error, response, body) => {
+					expect(error).to.be.null;
+					expect(response.statusCode).to.equal(204);
+					return done();
+				});
+			});
+		});
 		
-		it "should then list the thread as resolved", (done) ->
-			ChatClient.getThreads @project_id, (error, response, threads) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(threads[@thread_id].resolved).to.equal true
-				expect(threads[@thread_id].resolved_by_user_id).to.equal @user_id
-				resolved_at = new Date(threads[@thread_id].resolved_at)
-				expect(new Date() - resolved_at).to.be.below 1000
-				done()
+		return it("should then list the thread as resolved", function(done) {
+			return ChatClient.getThreads(this.project_id, (error, response, threads) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(threads[this.thread_id].resolved).to.equal(true);
+				expect(threads[this.thread_id].resolved_by_user_id).to.equal(this.user_id);
+				const resolved_at = new Date(threads[this.thread_id].resolved_at);
+				expect(new Date() - resolved_at).to.be.below(1000);
+				return done();
+			});
+		});
+	});
 
-	describe "when a thread is not resolved", ->
-		before (done) ->
-			@thread_id = ObjectId().toString()
-			@content = "open message"
-			ChatClient.sendMessage @project_id, @thread_id, @user_id, @content, (error, response, body) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 201
-				done()
+	describe("when a thread is not resolved", function() {
+		before(function(done) {
+			this.thread_id = ObjectId().toString();
+			this.content = "open message";
+			return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, this.content, (error, response, body) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(201);
+				return done();
+			});
+		});
 		
-		it "should not list the thread as resolved", (done) ->
-			ChatClient.getThreads @project_id, (error, response, threads) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(threads[@thread_id].resolved).to.be.undefined
-				done()
+		return it("should not list the thread as resolved", function(done) {
+			return ChatClient.getThreads(this.project_id, (error, response, threads) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(threads[this.thread_id].resolved).to.be.undefined;
+				return done();
+			});
+		});
+	});
 	
-	describe "when a thread is resolved then reopened", ->
-		before (done) ->
-			@thread_id = ObjectId().toString()
-			@content = "resolved message"
-			ChatClient.sendMessage @project_id, @thread_id, @user_id, @content, (error, response, body) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 201
-				ChatClient.resolveThread @project_id, @thread_id, @user_id, (error, response, body) =>
-					expect(error).to.be.null
-					expect(response.statusCode).to.equal 204
-					ChatClient.reopenThread @project_id, @thread_id, (error, response, body) =>
-						expect(error).to.be.null
-						expect(response.statusCode).to.equal 204
-						done()
+	return describe("when a thread is resolved then reopened", function() {
+		before(function(done) {
+			this.thread_id = ObjectId().toString();
+			this.content = "resolved message";
+			return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, this.content, (error, response, body) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(201);
+				return ChatClient.resolveThread(this.project_id, this.thread_id, this.user_id, (error, response, body) => {
+					expect(error).to.be.null;
+					expect(response.statusCode).to.equal(204);
+					return ChatClient.reopenThread(this.project_id, this.thread_id, (error, response, body) => {
+						expect(error).to.be.null;
+						expect(response.statusCode).to.equal(204);
+						return done();
+					});
+				});
+			});
+		});
 				
-		it "should not list the thread as resolved", (done) ->
-			ChatClient.getThreads @project_id, (error, response, threads) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(threads[@thread_id].resolved).to.be.undefined
-				done()
+		return it("should not list the thread as resolved", function(done) {
+			return ChatClient.getThreads(this.project_id, (error, response, threads) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(threads[this.thread_id].resolved).to.be.undefined;
+				return done();
+			});
+		});
+	});
+});
diff --git a/services/chat/test/acceptance/coffee/SendingAMessageTests.js b/services/chat/test/acceptance/coffee/SendingAMessageTests.js
index 64a2d5dbe5..d1459efe9b 100644
--- a/services/chat/test/acceptance/coffee/SendingAMessageTests.js
+++ b/services/chat/test/acceptance/coffee/SendingAMessageTests.js
@@ -1,101 +1,135 @@
-{ObjectId} = require "../../../app/js/mongojs"
-expect = require("chai").expect
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const {ObjectId} = require("../../../app/js/mongojs");
+const { expect } = require("chai");
 
-ChatClient = require "./helpers/ChatClient"
-ChatApp = require "./helpers/ChatApp"
+const ChatClient = require("./helpers/ChatClient");
+const ChatApp = require("./helpers/ChatApp");
 
-describe "Sending a message", ->
-	before (done) ->
-		ChatApp.ensureRunning done
+describe("Sending a message", function() {
+	before(done => ChatApp.ensureRunning(done));
 
-	describe "globally", ->
-		before (done) ->
-			@project_id = ObjectId().toString()
-			@user_id = ObjectId().toString()
-			@content = "global message"
-			ChatClient.sendGlobalMessage @project_id, @user_id, @content, (error, response, body) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 201
-				expect(body.content).to.equal @content
-				expect(body.user_id).to.equal @user_id
-				expect(body.room_id).to.equal @project_id
-				done()
+	describe("globally", function() {
+		before(function(done) {
+			this.project_id = ObjectId().toString();
+			this.user_id = ObjectId().toString();
+			this.content = "global message";
+			return ChatClient.sendGlobalMessage(this.project_id, this.user_id, this.content, (error, response, body) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(201);
+				expect(body.content).to.equal(this.content);
+				expect(body.user_id).to.equal(this.user_id);
+				expect(body.room_id).to.equal(this.project_id);
+				return done();
+			});
+		});
 		
-		it "should then list the message in the project messages", (done) ->
-			ChatClient.getGlobalMessages @project_id, (error, response, messages) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(messages.length).to.equal 1
-				expect(messages[0].content).to.equal @content
-				done()
+		return it("should then list the message in the project messages", function(done) {
+			return ChatClient.getGlobalMessages(this.project_id, (error, response, messages) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(messages.length).to.equal(1);
+				expect(messages[0].content).to.equal(this.content);
+				return done();
+			});
+		});
+	});
 
-	describe "to a thread", ->
-		before (done) ->
-			@project_id = ObjectId().toString()
-			@user_id = ObjectId().toString()
-			@thread_id = ObjectId().toString()
-			@content = "thread message"
-			ChatClient.sendMessage @project_id, @thread_id, @user_id, @content, (error, response, body) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 201
-				expect(body.content).to.equal @content
-				expect(body.user_id).to.equal @user_id
-				expect(body.room_id).to.equal @project_id
-				done()
+	describe("to a thread", function() {
+		before(function(done) {
+			this.project_id = ObjectId().toString();
+			this.user_id = ObjectId().toString();
+			this.thread_id = ObjectId().toString();
+			this.content = "thread message";
+			return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, this.content, (error, response, body) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(201);
+				expect(body.content).to.equal(this.content);
+				expect(body.user_id).to.equal(this.user_id);
+				expect(body.room_id).to.equal(this.project_id);
+				return done();
+			});
+		});
 		
-		it "should then list the message in the threads", (done) ->
-			ChatClient.getThreads @project_id, (error, response, threads) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(threads[@thread_id].messages.length).to.equal 1
-				expect(threads[@thread_id].messages[0].content).to.equal @content
-				done()
+		it("should then list the message in the threads", function(done) {
+			return ChatClient.getThreads(this.project_id, (error, response, threads) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(threads[this.thread_id].messages.length).to.equal(1);
+				expect(threads[this.thread_id].messages[0].content).to.equal(this.content);
+				return done();
+			});
+		});
 		
-		it "should not appear in the global messages", (done) ->
-			ChatClient.getGlobalMessages @project_id, (error, response, messages) =>
-				expect(error).to.be.null
-				expect(response.statusCode).to.equal 200
-				expect(messages.length).to.equal 0
-				done()
+		return it("should not appear in the global messages", function(done) {
+			return ChatClient.getGlobalMessages(this.project_id, (error, response, messages) => {
+				expect(error).to.be.null;
+				expect(response.statusCode).to.equal(200);
+				expect(messages.length).to.equal(0);
+				return done();
+			});
+		});
+	});
 	
-	describe "failure cases", ->
-		before () ->
-			@project_id = ObjectId().toString()
-			@user_id = ObjectId().toString()
-			@thread_id = ObjectId().toString()
+	return describe("failure cases", function() {
+		before(function() {
+			this.project_id = ObjectId().toString();
+			this.user_id = ObjectId().toString();
+			return this.thread_id = ObjectId().toString();
+		});
 		
-		describe "with a malformed user_id", ->
-			it "should return a graceful error", (done) ->
-				ChatClient.sendMessage @project_id, @thread_id, "malformed-user", "content", (error, response, body) =>
-					expect(response.statusCode).to.equal 400
-					expect(body).to.equal "Invalid user_id"
-					done()
+		describe("with a malformed user_id", () =>
+			it("should return a graceful error", function(done) {
+				return ChatClient.sendMessage(this.project_id, this.thread_id, "malformed-user", "content", (error, response, body) => {
+					expect(response.statusCode).to.equal(400);
+					expect(body).to.equal("Invalid user_id");
+					return done();
+				});
+			})
+		);
 		
-		describe "with a malformed project_id", ->
-			it "should return a graceful error", (done) ->
-				ChatClient.sendMessage "malformed-project", @thread_id, @user_id, "content", (error, response, body) =>
-					expect(response.statusCode).to.equal 400
-					expect(body).to.equal "Invalid project_id"
-					done()
+		describe("with a malformed project_id", () =>
+			it("should return a graceful error", function(done) {
+				return ChatClient.sendMessage("malformed-project", this.thread_id, this.user_id, "content", (error, response, body) => {
+					expect(response.statusCode).to.equal(400);
+					expect(body).to.equal("Invalid project_id");
+					return done();
+				});
+			})
+		);
 		
-		describe "with a malformed thread_id", ->
-			it "should return a graceful error", (done) ->
-				ChatClient.sendMessage @project_id, "malformed-thread-id", @user_id, "content", (error, response, body) =>
-					expect(response.statusCode).to.equal 400
-					expect(body).to.equal "Invalid thread_id"
-					done()
+		describe("with a malformed thread_id", () =>
+			it("should return a graceful error", function(done) {
+				return ChatClient.sendMessage(this.project_id, "malformed-thread-id", this.user_id, "content", (error, response, body) => {
+					expect(response.statusCode).to.equal(400);
+					expect(body).to.equal("Invalid thread_id");
+					return done();
+				});
+			})
+		);
 		
-		describe "with no content", ->
-			it "should return a graceful error", (done) ->
-				ChatClient.sendMessage @project_id, @thread_id, @user_id, null, (error, response, body) =>
-					expect(response.statusCode).to.equal 400
-					expect(body).to.equal "No content provided"
-					done()
+		describe("with no content", () =>
+			it("should return a graceful error", function(done) {
+				return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, null, (error, response, body) => {
+					expect(response.statusCode).to.equal(400);
+					expect(body).to.equal("No content provided");
+					return done();
+				});
+			})
+		);
 		
-		describe "with very long content", ->
-			it "should return a graceful error", (done) ->
-				content = new Buffer(10240).toString("hex")
-				ChatClient.sendMessage @project_id, @thread_id, @user_id, content, (error, response, body) =>
-					expect(response.statusCode).to.equal 400
-					expect(body).to.equal "Content too long (> 10240 bytes)"
-					done()
\ No newline at end of file
+		return describe("with very long content", () =>
+			it("should return a graceful error", function(done) {
+				const content = new Buffer(10240).toString("hex");
+				return ChatClient.sendMessage(this.project_id, this.thread_id, this.user_id, content, (error, response, body) => {
+					expect(response.statusCode).to.equal(400);
+					expect(body).to.equal("Content too long (> 10240 bytes)");
+					return done();
+				});
+			})
+		);
+	});
+});
\ No newline at end of file
diff --git a/services/chat/test/acceptance/coffee/helpers/ChatApp.js b/services/chat/test/acceptance/coffee/helpers/ChatApp.js
index 8973541003..916901b08c 100644
--- a/services/chat/test/acceptance/coffee/helpers/ChatApp.js
+++ b/services/chat/test/acceptance/coffee/helpers/ChatApp.js
@@ -1,20 +1,38 @@
-app = require('../../../../app')
-require("logger-sharelatex").logger.level("error")
+/*
+ * decaffeinate suggestions:
+ * DS101: Remove unnecessary use of Array.from
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS205: Consider reworking code to avoid use of IIFEs
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const app = require('../../../../app');
+require("logger-sharelatex").logger.level("error");
 
-module.exports =
-	running: false
-	initing: false
-	callbacks: []
-	ensureRunning: (callback = (error) ->) ->
-		if @running
-			return callback()
-		else if @initing
-			@callbacks.push callback
-		else
-			@initing = true
-			@callbacks.push callback
-			app.listen 3010, "localhost", (error) => 
-				throw error if error?
-				@running = true
-				for callback in @callbacks
-					callback()
\ No newline at end of file
+module.exports = {
+	running: false,
+	initing: false,
+	callbacks: [],
+	ensureRunning(callback) {
+		if (callback == null) { callback = function(error) {}; }
+		if (this.running) {
+			return callback();
+		} else if (this.initing) {
+			return this.callbacks.push(callback);
+		} else {
+			this.initing = true;
+			this.callbacks.push(callback);
+			return app.listen(3010, "localhost", error => { 
+				if (error != null) { throw error; }
+				this.running = true;
+				return (() => {
+					const result = [];
+					for (callback of Array.from(this.callbacks)) {
+						result.push(callback());
+					}
+					return result;
+				})();
+			});
+		}
+	}
+};
\ No newline at end of file
diff --git a/services/chat/test/acceptance/coffee/helpers/ChatClient.js b/services/chat/test/acceptance/coffee/helpers/ChatClient.js
index 902d743d21..34c8d4cf5b 100644
--- a/services/chat/test/acceptance/coffee/helpers/ChatClient.js
+++ b/services/chat/test/acceptance/coffee/helpers/ChatClient.js
@@ -1,60 +1,78 @@
-request = require("request").defaults({baseUrl: "http://localhost:3010"})
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const request = require("request").defaults({baseUrl: "http://localhost:3010"});
 
-module.exports =
-	sendGlobalMessage: (project_id, user_id, content, callback) ->
-		request.post {
-			url: "/project/#{project_id}/messages"
-			json:
-				user_id: user_id
-				content: content
-		}, callback
-	
-	getGlobalMessages: (project_id, callback) ->
-		request.get {
-			url: "/project/#{project_id}/messages",
-			json: true
-		}, callback
-
-	sendMessage: (project_id, thread_id, user_id, content, callback) ->
-		request.post {
-			url: "/project/#{project_id}/thread/#{thread_id}/messages"
-			json:
-				user_id: user_id
-				content: content
-		}, callback
-	
-	getThreads: (project_id, callback) ->
-		request.get {
-			url: "/project/#{project_id}/threads",
-			json: true
-		}, callback
-	
-	resolveThread: (project_id, thread_id, user_id, callback) ->
-		request.post {
-			url: "/project/#{project_id}/thread/#{thread_id}/resolve",
+module.exports = {
+	sendGlobalMessage(project_id, user_id, content, callback) {
+		return request.post({
+			url: `/project/${project_id}/messages`,
 			json: {
-				user_id: user_id
+				user_id,
+				content
 			}
-		}, callback
+		}, callback);
+	},
+	
+	getGlobalMessages(project_id, callback) {
+		return request.get({
+			url: `/project/${project_id}/messages`,
+			json: true
+		}, callback);
+	},
 
-	reopenThread: (project_id, thread_id, callback) ->
-		request.post {
-			url: "/project/#{project_id}/thread/#{thread_id}/reopen",
-		}, callback
+	sendMessage(project_id, thread_id, user_id, content, callback) {
+		return request.post({
+			url: `/project/${project_id}/thread/${thread_id}/messages`,
+			json: {
+				user_id,
+				content
+			}
+		}, callback);
+	},
+	
+	getThreads(project_id, callback) {
+		return request.get({
+			url: `/project/${project_id}/threads`,
+			json: true
+		}, callback);
+	},
+	
+	resolveThread(project_id, thread_id, user_id, callback) {
+		return request.post({
+			url: `/project/${project_id}/thread/${thread_id}/resolve`,
+			json: {
+				user_id
+			}
+		}, callback);
+	},
 
-	deleteThread: (project_id, thread_id, callback) ->
-		request.del {
-			url: "/project/#{project_id}/thread/#{thread_id}",
-		}, callback
+	reopenThread(project_id, thread_id, callback) {
+		return request.post({
+			url: `/project/${project_id}/thread/${thread_id}/reopen`,
+		}, callback);
+	},
 
-	editMessage: (project_id, thread_id, message_id, content, callback) ->
-		request.post {
-			url: "/project/#{project_id}/thread/#{thread_id}/messages/#{message_id}/edit"
-			json:
-				content: content
-		}, callback
+	deleteThread(project_id, thread_id, callback) {
+		return request.del({
+			url: `/project/${project_id}/thread/${thread_id}`,
+		}, callback);
+	},
 
-	deleteMessage: (project_id, thread_id, message_id, callback) ->
-		request.del {
-			url: "/project/#{project_id}/thread/#{thread_id}/messages/#{message_id}",
-		}, callback
+	editMessage(project_id, thread_id, message_id, content, callback) {
+		return request.post({
+			url: `/project/${project_id}/thread/${thread_id}/messages/${message_id}/edit`,
+			json: {
+				content
+			}
+		}, callback);
+	},
+
+	deleteMessage(project_id, thread_id, message_id, callback) {
+		return request.del({
+			url: `/project/${project_id}/thread/${thread_id}/messages/${message_id}`,
+		}, callback);
+	}
+};