Fixed BC break introduced in #45

We forgot to change one thing: The filename change. This fixes that.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | [comma separated list of tickets fixed by the PR]
| License       | MIT
| Doc PR        | -