Tests assume being ran in certain timezone

[alloy]

When I run the test suite (in my CEST timezone), the following tests fail:

Summary of all failing tests
 FAIL  src/client/apps/edit/components/admin/components/article/test/article_publish_date.test.tsx
  ● ArticlePublishDate › time › Can change the time

    expect(received).toMatch(expected)

    Expected value to match:
      "02:34"
    Received:
      "2017-05-19T00:34:00.000Z"

      119 | 
      120 |       expect(props.onChange.mock.calls[0][0]).toBe("published_at")
    > 121 |       expect(props.onChange.mock.calls[0][1]).toMatch("02:34")
          |                                               ^
      122 |     })
      123 |   })
      124 | 

      at Object.toMatch (src/client/apps/edit/components/admin/components/article/test/article_publish_date.test.tsx:121:47)

 FAIL  src/client/apps/edit/components/admin/components/article/test/index.test.tsx
  ● AdminArticle › Editing › Can change video release date

    expect(received).toMatch(expected)

    Expected value to match:
      "2017-02-07"
    Received:
      "2017-02-06T23:00:00.000Z"

      377 | 
      378 |       expect(props.onChangeArticleAction.mock.calls[0][0]).toEqual("media")
    > 379 |       expect(props.onChangeArticleAction.mock.calls[0][1].release_date).toMatch(
          |                                                                         ^
      380 |         "2017-02-07"
      381 |       )
      382 |     })

      at Object.toMatch (src/client/apps/edit/components/admin/components/article/test/index.test.tsx:379:73)

 FAIL  src/client/apps/settings/client/curations/gucci/test/section.test.tsx
  ● Section Admin › Updates release date and saves as iso

    expect(received).toMatch(expected)

    Expected value to match:
      "2017-11-15T"
    Received:
      "2017-11-14T23:00:00.000Z"

      127 | 
      128 |     expect(props.onChange.mock.calls[0][0]).toMatch("release_date")
    > 129 |     expect(props.onChange.mock.calls[0][1]).toMatch("2017-11-15T")
          |                                             ^
      130 |   })
      131 | 
      132 |   it("Updates video url on input", () => {

      at Object.toMatch (src/client/apps/settings/client/curations/gucci/test/section.test.tsx:129:45)


Test Suites: 3 failed, 113 passed, 116 total
Tests:       3 failed, 7 skipped, 1311 passed, 1321 total

These tests should not assume the timezone to be New York (probably?)