diff --git a/easybuild/easyconfigs/d/DECAF-synthetic-data/DECAF-synthetic-data-0.1.6-foss-2023b.eb b/easybuild/easyconfigs/d/DECAF-synthetic-data/DECAF-synthetic-data-0.1.6-foss-2023b.eb
index 5e7989af627..a2bfee4e2c8 100644
--- a/easybuild/easyconfigs/d/DECAF-synthetic-data/DECAF-synthetic-data-0.1.6-foss-2023b.eb
+++ b/easybuild/easyconfigs/d/DECAF-synthetic-data/DECAF-synthetic-data-0.1.6-foss-2023b.eb
@@ -23,6 +23,8 @@ dependencies = [
 use_pip = True
 sanity_pip_check = True
 
+local_pretestopts = "export SLURM_NTASKS_PER_NODE=$SLURM_NTASKS && "
+
 exts_list = [
     ('networkx', '2.8.8', {
         'checksums': ['230d388117af870fce5647a3c52401fcf753e94720e6ea6b4197a5355648885e'],
@@ -36,7 +38,7 @@ exts_list = [
         'sources': [{'download_filename': 'v%(version)s.tar.gz', 'filename': SOURCE_TAR_GZ}],
         'checksums': ['8f34e99937d2ccc43bff97b310c371c450e27313c0801cdd36aa91664c8e3180'],
         'testinstall': True,
-        'runtest': 'pytest -vsx',
+        'runtest': local_pretestopts + 'pytest -vsx',
     }),
 ]