diff --git a/tests/main.nf.test b/tests/main.nf.test
index 8929b2a..1e49724 100644
--- a/tests/main.nf.test
+++ b/tests/main.nf.test
@@ -932,6 +932,7 @@ test("Should GWAS with chunking and optional step 1 param") {
     }
 
     then {
+        println workflow.stderr.contains("Missing required parameter")
         assert workflow.failed
         snapshot(workflow.trace).match()
     }