How to test a prop update on React component

What is the correct way of unit testing a React component prop update.

Here is my test fixture;

describe('updating the value', function(){
        var component;
        beforeEach(function(){
            component = TestUtils.renderIntoDocument(<MyComponent value={true} />);
        });

        it('should update the state of the component when the value prop is changed', function(){
            // Act
            component.props.value = false;
            component.forceUpdate();
            // Assert
            expect(component.state.value).toBe(false);
        });
});

This works fine and the test passes, however this displays a react warning message

'Warning: Dont set .props.value of the React component <exports />. Instead specify the correct value when initially creating the element or use React.cloneElement to make a new element with updated props.'

All i want to test is the update of a property, not to create a new instance of the element with a different property. Is there a better way to do this property update?