diff --git a/test/unit/errors.test.js b/test/unit/errors.test.js
deleted file mode 100644
index 9c4393a..0000000
--- a/test/unit/errors.test.js
+++ /dev/null
@@ -1,132 +0,0 @@
-'use strict';
-
-const expect = require('chai').expect;
-
-const jstp = require('../..');
-const RemoteError = jstp.RemoteError;
-
-describe('RemoteError', () => {
-  describe('instance', () => {
-    it('must be a subclass of Error', () => {
-      const error = new RemoteError(1);
-      expect(error).to.be.an.instanceof(Error);
-    });
-
-    it('must have error name equal to \'RemoteError\'', () => {
-      const error = new RemoteError(1);
-      expect(error.name).to.equal('RemoteError');
-    });
-
-    it('must have the \'code\' property', () => {
-      const error = new RemoteError(42);
-      expect(error.code).to.equal(42);
-    });
-
-    it('must accept an optional message', () => {
-      const message = 'Sample message';
-      const error = new RemoteError(1, message);
-      expect(error.message).to.equal(message);
-    });
-
-    it('must use a default message when the message is not specified and ' +
-       'the error code is known', () => {
-      const error = new RemoteError(10);
-      expect(error.message).to.be.a('string');
-    });
-
-    it('must use the code as a message when the message is not specified ' +
-       'and the error code is unknown', () => {
-      const error = new RemoteError(42);
-      expect(error.message).to.equal('42');
-    });
-  });
-
-  describe('toJstpArray', () => {
-    it('must return an array with the only element which is error code ' +
-       'for known errors', () => {
-      [ new RemoteError(10),
-        new RemoteError(10, 'Application not found')
-      ].forEach((error) => {
-        expect(error.toJstpArray()).to.eql([10]);
-      });
-    });
-
-    it('must return an array of code and message for unknown errors',
-      () => {
-        const error = new RemoteError(42, 'Sample message');
-        expect(error.toJstpArray()).to.eql([42, 'Sample message']);
-      });
-
-    it('must return a one-element array with error code if the error message ' +
-       'is missing', () => {
-      const error = new RemoteError(42);
-      expect(error.toJstpArray()).to.eql([42]);
-    });
-  });
-
-  describe('fromJstpArray', () => {
-    it('must create a standard error', () => {
-      const error = RemoteError.fromJstpArray([jstp.ERR_APP_NOT_FOUND]);
-      expect(error).to.be.an.instanceof(RemoteError);
-      expect(error.code).to.equal(jstp.ERR_APP_NOT_FOUND);
-      expect(error.message).to.equal(
-        RemoteError.defaultMessages[jstp.ERR_APP_NOT_FOUND]);
-    });
-
-    it('must create an error without description', () => {
-      const error = RemoteError.fromJstpArray([42]);
-      expect(error).to.be.an.instanceof(RemoteError);
-      expect(error.code).to.equal(42);
-      expect(error.message).to.equal('42');
-    });
-
-    it('must create an error with description', () => {
-      const error = RemoteError.fromJstpArray([42, 'Message']);
-      expect(error).to.be.an.instanceof(RemoteError);
-      expect(error.code).to.equal(42);
-      expect(error.message).to.equal('Message');
-    });
-  });
-
-  describe('getJstpArrayFor', () => {
-    it('must return an an array for RemoteError', () => {
-      const firstError = new RemoteError(10);
-      const secondError = new RemoteError(42);
-      const thirdError = new RemoteError(42, 'Sample message');
-
-      expect(RemoteError.getJstpArrayFor(firstError)).to.eql([10]);
-      expect(RemoteError.getJstpArrayFor(secondError)).to.eql([42]);
-      expect(RemoteError.getJstpArrayFor(thirdError))
-        .to.eql([42, 'Sample message']);
-    });
-
-    it('must return an array for Error', () => {
-      const error = new TypeError('Invalid argument');
-      const array = RemoteError.getJstpArrayFor(error);
-      expect(array).to.eql([1, 'TypeError: Invalid argument']);
-    });
-
-    it('must return correctly formatted arrays untouched', () => {
-      const error = [42, 'Sample message'];
-      const array = RemoteError.getJstpArrayFor(error);
-      expect(array).to.eql(error);
-    });
-
-    it('must return an array with error code for number', () => {
-      const array = RemoteError.getJstpArrayFor(42);
-      expect(array).to.eql([42]);
-    });
-
-    it('must return an array for string', () => {
-      const array = RemoteError.getJstpArrayFor('Sample message');
-      expect(array).to.eql([1, 'Sample message']);
-    });
-  });
-
-  it('must have predefined protocol errors', () => {
-    const errors = Object.keys(jstp)
-      .filter(key => key.startsWith('ERR_'))
-      .map(key => jstp[key].toString());
-    expect(RemoteError.defaultMessages).to.contain.keys(errors);
-  });
-});