Prueba de transferencia de tokens con trufa

Tengo un contrato de Token:

pragma solidity ^0.4.24;

import "openzeppelin-solidity/contracts/token/ERC20/StandardToken.sol";

contract MyToken is StandardToken{

    string public name = "MyToken";
    string public symbol = "MYT";
    uint8 public decimals = 10;
    uint public INITIAL_SUPPLY = 100000000000000000;

    constructor() public {
        totalSupply_ = INITIAL_SUPPLY;
        balances[msg.sender] = INITIAL_SUPPLY;
    }

}

Y las siguientes pruebas:

pragma solidity ^0.4.0;

import "truffle/Assert.sol";
import "truffle/DeployedAddresses.sol";
import "../contracts/MyToken.sol";

contract TestMyToken{
    MyToken mytoken;

    constructor() public{
       mytoken  = MyToken(DeployedAddresses.MyToken());

    }

    // Testing the adopt() function
    function testTotalSupply() public {
      uint returned = mytoken.totalSupply();
      uint expected = 100000000000000000;
      Assert.equal(returned, expected, "Total Supply should be 100000000000000000.");
    }

    function testTransferFrom() public  {
        address _to = 0x89EAB984AbB3E7Cc0f847dc321fCD9B95a538f05;

        bool result = mytoken.transfer( _to, 1);
        Assert.isTrue(result, "Transfer should succeed.");
    }

}

Estoy usando trufa con Ganache. Cuando ejecuto las pruebas me sale:

    truffle test
Using network 'development'.

Compiling ./test/TestMyToken.sol...


  TestMyToken
    ✓ testTotalSupply (58ms)
    1) testTransferFrom
    > No events were emitted


  1 passing (3s)
  1 failing

  1) TestMyToken
       testTransferFrom:
     Error: Returned error: VM Exception while processing transaction: revert
      at Object.ErrorResponse (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3-core-helpers/src/errors.js:29:1)
      at /usr/local/lib/node_modules/truffle/build/webpack:/~/web3-core-requestmanager/src/index.js:140:1
      at /usr/local/lib/node_modules/truffle/build/webpack:/packages/truffle-provider/wrapper.js:101:1
      at XMLHttpRequest.request.onreadystatechange (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3-providers-http/src/index.js:79:1)
      at XMLHttpRequestEventTarget.dispatchEvent (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2-cookies/dist/xml-http-request-event-target.js:34:1)
      at XMLHttpRequest._setReadyState (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2-cookies/dist/xml-http-request.js:208:1)
      at XMLHttpRequest._onHttpResponseEnd (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2-cookies/dist/xml-http-request.js:318:1)
      at IncomingMessage.<anonymous> (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2-cookies/dist/xml-http-request.js:289:47)
      at endReadableNT (_stream_readable.js:1092:12)
      at process._tickCallback (internal/process/next_tick.js:63:19

La dirección:

address _to = 0x89EAB984AbB3E7Cc0f847dc321fCD9B95a538f05;

es una de las direcciones de prueba que proporciona Ganache al inicio.

Por lo que he leído, creo que eso "Error: Returned error: VM Exception while processing transaction: revert"indica que la dirección no es válida. ¿Está bien? ¿Es un problema con la dirección _to?

¿Cómo trabajo con las direcciones de prueba proporcionadas por Ganache en mis pruebas?

¿Cuál es la forma correcta de probar la transferencia de tokens MyToken (no ether) de una dirección a otra?

Actualizar:

Modifiqué MyToken para que sea Burnable. Luego agregué esta prueba:

function testBurn() public {
    mytoken.burn(1000);
    uint balance = mytoken.balanceOf(msg.sender);
    uint expected = 100000000000000000 - 1000;
    Assert.equal(balance, expected, "Balance should be reduced.");

}

Esa prueba también falla. Siento que me estoy perdiendo algo aquí. Las lecturas funcionan bien, pero si trato de modificar los datos, se está revirtiendo.

  1) TestMyToken
       testBurn:
     Error: Returned error: VM Exception while processing transaction: revert
      at Object.ErrorResponse (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3-core-helpers/src/errors.js:29:1)
      at /usr/local/lib/node_modules/truffle/build/webpack:/~/web3-core-requestmanager/src/index.js:140:1
      at /usr/local/lib/node_modules/truffle/build/webpack:/packages/truffle-provider/wrapper.js:101:1
      at XMLHttpRequest.request.onreadystatechange (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3-providers-http/src/index.js:79:1)
      at XMLHttpRequestEventTarget.dispatchEvent (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2-cookies/dist/xml-http-request-event-target.js:34:1)
      at XMLHttpRequest._setReadyState (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2-cookies/dist/xml-http-request.js:208:1)
      at XMLHttpRequest._onHttpResponseEnd (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2-cookies/dist/xml-http-request.js:318:1)
      at IncomingMessage.<anonymous> (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2-cookies/dist/xml-http-request.js:289:47)
      at endReadableNT (_stream_readable.js:1092:12)
      at process._tickCallback (internal/process/next_tick.js:63:19)