fix linting

.github/CONTRIBUTING.md

@@ -26,8 +26,11 @@ If you're not used to this workflow with git, you can start with some [docs from
 
 ## Tests
 
-You can optionally test your changes by running the pipeline locally. Then it is recommended to use the `debug` profile to
-receive warnings about process selectors and other debug info. Example: `nextflow run . -profile debug,test,docker --outdir <OUTDIR>`.
+You have the option to test your changes locally by running the pipeline. For receiving warnings about process selectors and other `debug` information, it is recommended to use the debug profile. Execute all the tests with the following command:
+
+```bash
+nf-test test --profile debug,test,docker --verbose
+```
 
 When you create a pull request with changes, [GitHub Actions](https://github.com/features/actions) will run automatic tests.
 Typically, pull-requests are only fully reviewed when these tests are passing, though of course we can help out before then.

.github/workflows/download_pipeline.yml

@@ -83,3 +83,4 @@ jobs:
         env:
           NXF_SINGULARITY_CACHEDIR: ./
           NXF_SINGULARITY_HOME_MOUNT: true
+        run: nextflow run ./${{ env.REPOTITLE_LOWERCASE }}/$( sed 's/\W/_/g' <<< ${{ env.REPO_BRANCH }}) -profile test,singularity --outdir ./results