diff --git a/config/vsc_hortense.py b/config/vsc_hortense.py
index 7c1f6017..3ad2c674 100644
--- a/config/vsc_hortense.py
+++ b/config/vsc_hortense.py
@@ -2,6 +2,7 @@
 # https://docs.vscentrum.be/en/latest/gent/tier1_hortense.html
 #
 # authors: Samuel Moors (VUB-HPC), Kenneth Hoste (HPC-UGent)
+import os
 
 from reframe.core.backends import register_launcher
 from reframe.core.launchers import JobLauncher
@@ -20,6 +21,7 @@ class MyMpirunLauncher(JobLauncher):
     def command(self, job):
         return ['mympirun', '--hybrid', str(job.num_tasks_per_node)]
 
+
 eessi_cvmfs_repo = os.getenv('EESSI_CVMFS_REPO', None)
 if eessi_cvmfs_repo is not None:
     prepare_eessi_init = 'module --force purge'