diff --git a/modules/svdb/merge/main.nf b/modules/svdb/merge/main.nf
index 05fb2b17..477dbb0d 100644
--- a/modules/svdb/merge/main.nf
+++ b/modules/svdb/merge/main.nf
@@ -48,7 +48,7 @@ process SVDB_MERGE {
     stub:
     def prefix = task.ext.prefix ?: "${meta.id}"
     """
-    touch ${prefix}_sv_merge.vcf
+    touch ${prefix}_sv_merge.vcf.gz
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":
diff --git a/tests/modules/svdb/merge/test.yml b/tests/modules/svdb/merge/test.yml
index 12355020..5af282ae 100644
--- a/tests/modules/svdb/merge/test.yml
+++ b/tests/modules/svdb/merge/test.yml
@@ -12,3 +12,10 @@
     - svdb/merge
   files:
     - path: output/svdb/test_sv_merge.vcf.gz
+- name: svdb merge test_svdb_merge_noprio stub
+  command: nextflow run ./tests/modules/svdb/merge -entry test_svdb_merge_noprio -c ./tests/config/nextflow.config -c ./tests/modules/svdb/merge/nextflow.config -stub
+  tags:
+    - svdb
+    - svdb/merge
+  files:
+    - path: output/svdb/test_sv_merge.vcf.gz