diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 000000000..d5f97c6ac
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,87 @@
+// DOM Interaction Helpers
+
+export type Target = string | Element;
+
+export type KeyEvent = 'keydown' | 'keyup' | 'keypress';
+
+export interface KeyModifiers {
+  ctrlKey?: boolean;
+  altKey?: boolean;
+  shiftKey?: boolean;
+  metaKey?: boolean;
+}
+
+export function click(target: Target): Promise<void>;
+export function tap(target: Target): Promise<void>;
+export function focus(target: Target): Promise<void>;
+export function blur(target: Target): Promise<void>;
+export function triggerEvent(target: Target, eventType: string, options?: object): Promise<void>;
+export function triggerKeyEvent(target: Target, eventType: KeyEvent, modifiers?: KeyModifiers): Promise<void>;
+export function fillIn(target: Target, text: string): Promise<void>;
+
+// DOM Query Helpers
+
+export function find(selector: string): Element | null;
+export function findAll(selector: string): Array<Element>;
+export function getRootElement(): Element;
+
+// Routing Helpers
+
+export function visit(url: string): Promise<void>;
+export function currentRouteName(): string;
+export function currentURL(): string;
+
+// Rendering Helpers
+
+import { TemplateFactory } from 'htmlbars-inline-precompile';
+
+export function render(template: TemplateFactory): Promise<void>;
+export function clearRender(): Promise<void>;
+
+// Wait Helpers
+
+export interface WaitForOptions {
+  timeout?: number;
+  count?: number;
+  timeoutMessage?: string;
+}
+
+export interface SettledState {
+  hasRunLoop: boolean;
+  hasPendingTimers: boolean;
+  hasPendingWaiters: boolean;
+  hasPendingRequests: boolean;
+  pendingRequestCount: number;
+}
+
+export function waitFor(selector: string, options?: WaitForOptions): Element | Array<Element>;
+export function waitUntil<T>(callback: () => T, options?: WaitUntilOptions): Promise<T>;
+export function settled(): Promise<void>;
+export function isSettled(): boolean;
+export function getSettledState(): SettledState;
+
+// Pause Helpers
+
+export function pauseTest(): Promise<void>;
+export function resumeTest(): void;
+
+// Test Framework APIs
+
+import Application from '@ember/application';
+import Resolver from '@ember/application/resolver';
+import Error from '@ember/error';
+
+export function setResolver(resolver: Resolver): void;
+export function getResolver(): Resolver;
+export function setupContext<C extends object>(context: C, options?: { resolver?: Resolver }): Promise<C>;
+export function getContext(): object;
+export function setContext(context: object): void;
+export function unsetContext(): void;
+export function teardownContext(context: object): Promise<void>;
+export function setupRenderingContext<C extends object>(context: C): Promise<C>;
+export function teardownRenderingContext(context: object): Promise<void>;
+export function getApplication(): Application;
+export function setApplication(aplication: Application): void;
+export function setupApplicationContext<C extends object>(context: C): Promise<C>;
+export function teardownApplicationContext(context: object): Promise<void>;
+export function validateErrorHandler(callback?: (error: Error) => void): { isValid: boolean, message: string };