Date object value is changes -- JavaScript

I am doing a unit test on a component that receive date as a variable. My test fails because the ate variable in the actual and expected object keeps adding few milliseconds to the date value.

describe('Clock',()=>{
    it('works',()=>{
        let renderer = createRenderer();
        let date = new Date();


        renderer.render(<Clock time={ date}> </Clock>);
        let actualElement = renderer.getRenderOutput();

        let expectedElement = <FormattedTime value={date} hour="numeric" minute="numeric" second="numeric" />;

        expect(actualElement).toEqual(expectedElement);
    });
});

When i run my test . IN the above, it shows the expectedElement date added some few milliseconds.

-    "value": [Date: 2016-01-28T04:48:57.000Z]
+    "value": [Date: 2016-01-28T04:48:57.893Z]

Please how do i make the date tally ? Or better get rid of the milli seconds . I tried many opetions like

let date = Math.floor(new Date().getTime()/1000);
let rTime = new Date(date * 1000);

renderer.render(<Clock time={ rTime}> </Clock>);
let actualElement = renderer.getRenderOutput();

let expectedElement = <FormattedTime value={rTime} hour="numeric" minute="numeric" second="numeric" />;

Any help would be appreciated.