Compared values have no visual difference error for a prop component

I am doing testing with enzyme for my props component and have this error:

import icon from "./icon.svg";


it("should have a prop space", () => {
    const tree = shallow(
      <button name="button test" space={icon} />
    );
    expect(tree.props().space).toEqual(<span>{icon} </span>);
  });

I am getting this message:

expect(received).toEqual(expected)

Expected value to equal:
     <span>test-file-stub </span>
Received:
      <span>test-file-stub </span>

What am I missing?