diff --git a/.github/workflows/test_common.yml b/.github/workflows/test_common.yml
index 59f68a26..c68f724e 100644
--- a/.github/workflows/test_common.yml
+++ b/.github/workflows/test_common.yml
@@ -6,6 +6,7 @@ on:
     inputs:
       node1:
         required: true
+        type: string
         description: "Node that usually publishes messages. Used for all tests"
         default: "wakuorg/go-waku:latest"
       node2: