diff --git a/test/18-startup.coffee b/test/18-startup.coffee
deleted file mode 100644
index ed079354..00000000
--- a/test/18-startup.coffee
+++ /dev/null
@@ -1,13 +0,0 @@
-{ expect } = require './lib/chai-config'
-
-{ Supervisor } = require '../src/supervisor'
-
-describe 'Startup', ->
-	it 'should startup correctly', ->
-		supervisor = new Supervisor()
-		expect(supervisor.init()).to.not.throw
-		expect(supervisor.db).to.not.be.null
-		expect(supervisor.config).to.not.be.null
-		expect(supervisor.logger).to.not.be.null
-		expect(supervisor.deviceState).to.not.be.null
-		expect(supervisor.apiBinder).to.not.be.null
diff --git a/test/18-startup.ts b/test/18-startup.ts
new file mode 100644
index 00000000..7cec2ab1
--- /dev/null
+++ b/test/18-startup.ts
@@ -0,0 +1,16 @@
+import { Supervisor } from '../src/supervisor';
+import { expect } from './lib/chai-config';
+
+describe('Startup', () => {
+	it('should startup correctly', function() {
+		const supervisor = new Supervisor();
+		expect(supervisor.init()).to.not.throw;
+		// Cast as any to access private properties
+		const anySupervisor = supervisor as any;
+		expect(anySupervisor.db).to.not.be.null;
+		expect(anySupervisor.config).to.not.be.null;
+		expect(anySupervisor.logger).to.not.be.null;
+		expect(anySupervisor.deviceState).to.not.be.null;
+		expect(anySupervisor.apiBinder).to.not.be.null;
+	});
+});