# Coverage dropped a lot with a commit which only contains untracked files

**URL:** <https://community.codecov.com/t/coverage-dropped-a-lot-with-a-commit-which-only-contains-untracked-files/65>\
**Category:** Support\
**Created:** [March 26, 2019, 5:01am UTC](https://community.codecov.com/t/coverage-dropped-a-lot-with-a-commit-which-only-contains-untracked-files/65 "2019-03-26T05:01:37Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![plrthink](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.codecov.com/plrthink/32/31_2.png) [@plrthink](https://community.codecov.com/u/plrthink)\
**Post date:** [March 26, 2019, 5:01am UTC](https://community.codecov.com/t/coverage-dropped-a-lot-with-a-commit-which-only-contains-untracked-files/65/1 "2019-03-26T05:01:37Z")

</div>

### Description

We’re using Codecov on a Rails application. Recently, we saw the code coverage dropped a lot since a commit, which only contains file marked as untracked. And we also see the coverage reported by simplecov stays the same.

### Repository

> **[Code coverage done right.](https://app.codecov.io/gh/mockingbot/imock)**
>
> Hosted coverage report highly integrated with GitHub, Bitbucket and GitLab. Awesome pull request comments to enhance your QA.

### Versions

Chrome 73 on macOS 14.4.3

### Additional Information

We first saw the decrease in this commit [Codecov](https://codecov.io/gh/mockingbot/imock/commit/b42def71835ed8d0bda1f9715250efacd3b0883d).

Here’s the code we used in our test\_helper.rb to invoke the codecov

```
require 'simplecov'
SimpleCov.start 'rails' do
  add_filter '/app/admin/'
end
require 'codecov'
SimpleCov.formatter = SimpleCov::Formatter::Codecov

```

---

<div class="post-metadata">

**Author:** ![plrthink](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.codecov.com/plrthink/32/31_2.png) [@plrthink](https://community.codecov.com/u/plrthink)\
**Post date:** [March 29, 2019, 10:53am UTC](https://community.codecov.com/t/coverage-dropped-a-lot-with-a-commit-which-only-contains-untracked-files/65/2 "2019-03-29T10:53:34Z")

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Can anyone help us out with this problem? Please

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<div class="post-metadata">

**Author:** ![jerrod](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.codecov.com/jerrod/32/41_2.png) [@jerrod](https://community.codecov.com/u/jerrod)\
**Post date:** [April 5, 2019, 6:14pm UTC](https://community.codecov.com/t/coverage-dropped-a-lot-with-a-commit-which-only-contains-untracked-files/65/3 "2019-04-05T18:14:40Z")

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Hey! Thanks for your patience.

Is the coverage report generated for the commit running your full test suite? If not / only running partial testing, Codecov doesn’t know how to assume coverage on the rest of the report.

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<div class="post-metadata">

**Author:** ![plrthink](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.codecov.com/plrthink/32/31_2.png) [@plrthink](https://community.codecov.com/u/plrthink)\
**Post date:** [April 19, 2019, 4:02am UTC](https://community.codecov.com/t/coverage-dropped-a-lot-with-a-commit-which-only-contains-untracked-files/65/4 "2019-04-19T04:02:03Z")

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I think it has tested over the whole test suits, but not sure about that, is there something I can confirm this?