diff --git a/test/checkHost.test.js b/test/checkHost.test.js
new file mode 100644
index 0000000000..d036218438
--- /dev/null
+++ b/test/checkHost.test.js
@@ -0,0 +1,62 @@
+"use strict";
+
+const Server = require("../lib/Server");
+
+describe("Server.prototype.checkHost", () => {
+	const checkHost = (context, headers) => Server.prototype.checkHost.call(context, headers);
+	let context;
+	let headers;
+
+	beforeEach(() => {
+		context = {};
+		headers = { host: "www.example.com" };
+	});
+
+	it("should return false by default", () => {
+		checkHost(context, headers).should.be.false;
+	});
+	it("should return true if 'disableHostCheck' option is true", () => {
+		context = { disableHostCheck: true };
+		checkHost(context, headers).should.be.true;
+	});
+	it("should return false if no host header is present and disableHostCheck is not true", () => {
+		headers = {};
+		checkHost(context, headers).should.be.false;
+	});
+	it("should return true if host is 'localhost' or '127.0.0.1'", () => {
+		headers = { host: "localhost" };
+		checkHost(context, headers).should.be.true;
+
+		headers = { host: "127.0.0.1" };
+		checkHost(context, headers).should.be.true;
+	});
+	it("should return true if host === listenHostName", () => {
+		context = { listenHostName: "www.example.com" };
+		checkHost(context, headers).should.be.true;
+	});
+	it("should return true if host === publicHost", () => {
+		context = { publicHost: "www.example.com" };
+		checkHost(context, headers).should.be.true;
+	});
+	describe("allowed hosts", () => {
+		it("should return true if host is in allowedHosts", () => {
+			context = { allowedHosts: ["www.example.com"] };
+			checkHost(context, headers).should.be.true;
+		});
+		it("should return true if host passes a wildcard in allowedHosts", () => {
+			context = { allowedHosts: [".example.com"] };
+
+			headers = { host: "www.example.com" };
+			checkHost(context, headers).should.be.true;
+
+			headers = { host: "subdomain.example.com" };
+			checkHost(context, headers).should.be.true;
+
+			headers = { host: "example.com" };
+			checkHost(context, headers).should.be.true;
+
+			headers = { host: "subsubdomain.subdomain.example.com" };
+			checkHost(context, headers).should.be.true;
+		});
+	});
+});