Can I use this to compare classes of the same interface?

[JJPell]

Is there any way to use this library to compare classes which implement the same interface?

For example the following code doesn't appear to work.

const Hash = require('object-hash');

class Test {
  constructor(test, test2) {
    this.test = test;
    this.test2 = test2;
  }

  getTest = () => {
    return this.test;
  }

  getTest2 = () => {
    return this.test2;
  }
}

class Test2 {
  constructor(test, test2) {
    this.test = test;
    this.test2 = test2;
  }

  getTest = () => {
    return this.test;
  }

  getTest2 = () => {
    return this.test2;
  }
}

const options = {
  ignoreUnknown: true,
  respectFunctionProperties: false,
  respectFunctionNames: false,
  respectType: false,
};

console.log(Hash.MD5(new Test('123', 123), options));
console.log(Hash.MD5(new Test2('123', 123), options));