ReactJS & Enzyme: Matching elements contents to string

I have simple Intro component in React.js which renders a h1 and a p.

I am trying to write a test for the passed h1 & p strings with Enzyme but I'm unable to do this. What is wrong with this code?

      it('description of element is okay <p>', () => {
        const wrapper = shallow(<Intro title="Heading of element" description="Description of element" />);
        expect(wrapper.find('p').text().to.contain("Description of element")); // This is not working!
      });

If I console log the wrapper.find('p').text() it's not undefined... And yet the console says like this:

  1) (Component) Intro contains a single <p>:
 TypeError: Cannot read property 'contain' of undefined
  at Context.<anonymous> (test/components/alerts/alert.spec.js:19:12)