diff --git a/mocha/mocha.d.ts b/mocha/mocha.d.ts
new file mode 100644
index 0000000000..55b20cecc8
--- /dev/null
+++ b/mocha/mocha.d.ts
@@ -0,0 +1,24 @@
+declare var describe : {
+    (description: string, spec: () => void): void;
+    only(description: string, spec: () => void): void;
+    skip(description: string, spec: () => void): void;
+    timeout(ms: number);
+}
+
+declare var it: {
+    (expectation: string, assertion?: () => void): void;
+    (expectation: string, assertion?: (done: () => void) => void): void;
+    only(expectation: string, assertion?: () => void): void;
+    only(expectation: string, assertion?: (done: () => void) => void): void;
+    skip(expectation: string, assertion?: () => void): void;
+    skip(expectation: string, assertion?: (done: () => void) => void): void;
+    timeout(ms: number);
+};
+
+declare function beforeEach(action: () => void): void;
+
+declare function beforeEach(action: (done: () => void) => void): void;
+
+declare function afterEach(action: () => void): void;
+
+declare function afterEach(action: (done: () => void) => void): void;
\ No newline at end of file