diff --git a/.github/workflows/pytest-workflow.yml b/.github/workflows/pytest-workflow.yml
index 87f02f55..affbdd94 100644
--- a/.github/workflows/pytest-workflow.yml
+++ b/.github/workflows/pytest-workflow.yml
@@ -25,7 +25,7 @@ jobs:
       matrix:
         nxf_version: ['20.11.0-edge']
         tags: ['${{ fromJson(needs.changes.outputs.modules) }}']
-        profile: ['docker', 'singularity', 'conda']
+        profile: ['docker', 'conda'] ## 'singularity',
     env:
       NXF_ANSI_LOG: false
     steps: