diff --git a/tests/cwl/misc/wf-port-completer.cwl b/tests/cwl/misc/wf-port-completer.cwl
new file mode 100644
index 0000000..bc92483
--- /dev/null
+++ b/tests/cwl/misc/wf-port-completer.cwl
@@ -0,0 +1,25 @@
+class: Workflow
+cwlVersion: v1.0
+
+inputs:
+  in1: string
+
+steps:
+  - id: step1
+    run: clt1.cwl
+    in:
+       in1: in1
+    out: [out1]
+
+  - id: step2
+    run: clt1.cwl
+    in:
+      in1: step1/out1
+    out: [out1]
+
+outputs:
+  out1:
+    type: string[]
+    outputSource:
+      - step1/out1
+      - in1