diff --git a/spec/exampleclass.ts b/spec/exampleclass.ts
new file mode 100644
index 0000000..0428bc1
--- /dev/null
+++ b/spec/exampleclass.ts
@@ -0,0 +1,11 @@
+import TinyDiInjectableBase from '../dist/injectable';
+
+export default class MyClass extends TinyDiInjectableBase {
+  constructor(private dep: any) {
+    super();
+  }
+}
+MyClass.$inject = {
+  deps: ['dependency'],
+  callAs: 'class'
+};
diff --git a/spec/typescript.spec.ts b/spec/typescript.spec.ts
new file mode 100644
index 0000000..0b6058e
--- /dev/null
+++ b/spec/typescript.spec.ts
@@ -0,0 +1,28 @@
+///<reference path="../tiny-di.d.ts" />
+import TinyDiInjectableBase from '../dist/injectable';
+
+describe('typescript class', () => {
+  it('can define $inject property', () => {
+    class MyClass extends TinyDiInjectableBase {}
+    MyClass.$inject = ['dependency'];
+    expect(MyClass.$inject).toBeDefined();
+  });
+
+  it('can be loaded by tiny-di', () => {
+    let tiny = require('../dist');
+    let injector: TinyDiInjector  = new tiny();
+    injector.setResolver(resolver);
+    injector.bind('dependency').to('exampleDep');
+    injector.bind('myClassInstance').load(__dirname + '/exampleclass.js');
+
+    let instance = injector.get('myClassInstance');
+    expect(instance.dep).toEqual('exampleDep');
+  });
+});
+
+/**
+ * define resolver to load default exported classes
+ */
+function resolver(module: string) {
+  return require(module).default;
+}
diff --git a/src/injectable.ts b/src/injectable.ts
index fc20443..867056a 100644
--- a/src/injectable.ts
+++ b/src/injectable.ts
@@ -1,5 +1,5 @@
 export default class TinyDiInjectableBase {
-   public static $inject: string[] | {
+  public static $inject: string[] | {
     deps: string[],
     callAs: 'class' | 'function'
   };
diff --git a/tsconfig.spec.json b/tsconfig.spec.json
new file mode 100644
index 0000000..d20422a
--- /dev/null
+++ b/tsconfig.spec.json
@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {     
+    "noImplicitAny": true,
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "module": "commonjs",
+    "sourceMap": true,
+    "declaration": true,
+    "target": "es5",
+    "outDir": "buildspec"
+  },
+  
+  "exclude": [
+    "node_modules",
+    "src",
+    "buildspec"
+  ]
+}