Apply suggestions from code review

Co-authored-by: James A. Fellows Yates <jfy133@gmail.com>

Author: d4straub

.github/actions/nf-test/action.yml

@@ -59,8 +59,6 @@ runs:
     - name: Run nf-test
       shell: bash
       env:
-        NFT_DIFF: ${{ env.NFT_DIFF }}
-        NFT_DIFF_ARGS: ${{ env.NFT_DIFF_ARGS }}
         NFT_WORKDIR: ${{ env.NFT_WORKDIR }}
       run: |
         nf-test test \

nf-test.config

@@ -9,7 +9,7 @@ config {
     configFile "tests/nextflow.config"
 
     // ignore tests coming from the nf-core/modules repo
-    ignore 'modules/nf-core/**/*', 'subworkflows/nf-core/**/*'
+    ignore 'modules/nf-core/**/tests/*', 'subworkflows/nf-core/**/tests/*'
 
     // run all test with defined profile(s) from the main nextflow.config
     profile "test"