diff --git a/sinon/sinon-tests.ts b/sinon/sinon-tests.ts
index 78ee261ab..60751e908 100644
--- a/sinon/sinon-tests.ts
+++ b/sinon/sinon-tests.ts
@@ -19,7 +19,7 @@ function testOne() {
 }
 
 function testTwo() {
-	var callback = sinon.spy();
+	var callback = sinon.spy(() => {});
 	var proxy = once(callback);
 	proxy();
 	proxy();
@@ -28,7 +28,7 @@ function testTwo() {
 
 function testThree() {
 	var obj = { thisObj: true };
-	var callback = sinon.spy();
+	var callback = sinon.spy({}, "method");
 	var proxy = once(callback);
 	proxy.call(obj, callback, 1, 2, 3);
 	if (callback.calledOn(obj)) { console.log("test3 calledOn success"); } else { console.log("test3 calledOn failure"); }
@@ -80,6 +80,18 @@ function testEight() {
     var combinedMatcher = sinon.match.typeOf("object").and(sinon.match.has("pages"));
 }
 
+function testSandbox() {
+	var sandbox = sinon.sandbox.create();
+	if (sandbox.spy().called) {
+		sandbox.stub(objectUnderTest, "process").yieldsTo("success");
+		sandbox.mock(objectUnderTest).expects("process").once();
+	}
+	sandbox.useFakeTimers();
+	sandbox.useFakeXMLHttpRequest();
+	sandbox.useFakeServer();
+	sandbox.restore();
+}
+
 testOne();
 testTwo();
 testThree();
diff --git a/sinon/sinon.d.ts b/sinon/sinon.d.ts
index 0ae83aa4d..161ea8e60 100644
--- a/sinon/sinon.d.ts
+++ b/sinon/sinon.d.ts
@@ -347,11 +347,12 @@ interface SinonSandbox {
 	clock: SinonFakeTimers;
 	requests: SinonFakeXMLHttpRequest;
 	server: SinonFakeServer;
-	spy(): SinonSpy;
-	stub(): SinonStub;
-	mock(): SinonMock;
-	useFakeTimers: SinonFakeTimers;
-	useFakeXMLHttpRequest: SinonFakeXMLHttpRequest;
+	spy: SinonSpyStatic;
+	stub: SinonStubStatic;
+	mock: SinonMockStatic;
+	useFakeTimers: SinonFakeTimersStatic;
+	useFakeXMLHttpRequest: SinonFakeXMLHttpRequestStatic;
+	useFakeServer(): SinonFakeServer;
 	restore(): void;
 }