diff --git a/sinon-chai/sinon-chai.expect.d.ts b/sinon-chai/sinon-chai.expect.d.ts
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+// Type definitions for sinon-chai expect 2.4.0
+// Project: https://github.com/domenic/sinon-chai
+// Definitions by: Kazi Manzur Rashid <https://github.com/kazimanzurrashid/>
+// DefinitelyTyped: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../chai/chai.expect.d.ts" />
+
+declare module chai {
+    interface Been {
+        called: bool;
+        calledOnce: bool;
+        calledTwice: bool;
+        calledThrice: bool;
+        calledBefore(spy: any): bool;
+        calledAfter(spy: any): bool;
+        calledOn(context: any): bool;
+        alwaysCalledOn(context: any): bool;
+        calledWith(...args: any[]): bool;
+        alwaysCalledWith(...args: any[]): bool;
+        calledWithExactly(...args: any[]): bool;
+        alwaysCalledWithExactly(...args: any[]): bool;
+        calledWithMatch(...args: any[]): bool;
+        alwaysCalledWithMatch(...args: any[]): bool;
+        returned(returnVal: any): bool;
+        alwaysReturned(returnVal: any): bool;
+        threw(errorObjOrErrorTypeStringOrNothing: any): bool;
+        alwaysThrew(errorObjOrErrorTypeStringOrNothing: any): bool;
+    }
+
+    interface Have {
+        been: Been;
+    }
+}
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diff --git a/sinon-chai/sinon-chai.expect.ts b/sinon-chai/sinon-chai.expect.ts
new file mode 100644
index 000000000..ef4b4b784
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+++ b/sinon-chai/sinon-chai.expect.ts
@@ -0,0 +1,30 @@
+/// <reference path="../chai/chai.expect.d.ts" />
+/// <reference path="sinon-chai.expect.d.ts" />
+
+var expect = chai.expect;
+
+function test() {
+    var spy;
+    var anotherSpy;
+    var context;
+    var match;
+
+    expect(spy).to.have.been.called;
+    expect(spy).to.have.been.calledOnce;
+    expect(spy).to.have.been.calledTwice;
+    expect(spy).to.have.been.calledThrice;
+    expect(spy).to.have.been.calledBefore(anotherSpy);
+    expect(spy).to.have.been.calledAfter(anotherSpy);
+    expect(spy).to.have.been.calledOn(context);
+    expect(spy).to.have.been.alwaysCalledOn(context);
+    expect(spy).to.have.been.calledWith('foo', 'bar');
+    expect(spy).to.have.been.alwaysCalledWith('foo', 'bar');
+    expect(spy).to.have.been.calledWithExactly('foo', 'bar');
+    expect(spy).to.have.been.alwaysCalledWithExactly('foo', 'bar');
+    expect(spy).to.have.been.calledWithMatch(match);
+    expect(spy).to.have.been.alwaysCalledWithMatch(match);
+    expect(spy).to.have.been.returned(1);
+    expect(spy).to.have.been.alwaysReturned(1);
+    expect(spy).to.have.been.threw('an error');
+    expect(spy).to.have.been.alwaysThrew('an error');
+}
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