diff --git a/types/sinon/index.d.ts b/types/sinon/index.d.ts
index 224ab4003f..4a02ec691a 100644
--- a/types/sinon/index.d.ts
+++ b/types/sinon/index.d.ts
@@ -394,6 +394,7 @@ declare namespace Sinon {
     }
 
     interface SinonSandbox {
+        assert: SinonAssert;
         clock: SinonFakeTimers;
         requests: SinonFakeXMLHttpRequest;
         server: SinonFakeServer;
@@ -407,6 +408,8 @@ declare namespace Sinon {
         reset(): void;
         resetHistory(): void;
         resetBehavior(): void;
+        verify(): void;
+        verifyAndRestore(): void;
     }
 
     interface SinonSandboxStatic {
diff --git a/types/sinon/sinon-tests.ts b/types/sinon/sinon-tests.ts
index 8354045a25..2637d92c33 100644
--- a/types/sinon/sinon-tests.ts
+++ b/types/sinon/sinon-tests.ts
@@ -90,6 +90,9 @@ function testNine() {
 
 function testSandbox() {
     var sandbox = sinon.sandbox.create();
+
+    sandbox.assert.notCalled(sinon.spy());
+
     if (sandbox.spy().called) {
         sandbox.stub(objectUnderTest, "process").yieldsTo("success");
         sandbox.mock(objectUnderTest).expects("process").once();
@@ -101,6 +104,8 @@ function testSandbox() {
     sandbox.reset();
     sandbox.resetHistory();
     sandbox.resetBehavior();
+    sandbox.verify();
+    sandbox.verifyAndRestore();
 }
 
 function testPromises() {