diff --git a/tests.toml b/tests.toml
index 001ce35..8489737 100644
--- a/tests.toml
+++ b/tests.toml
@@ -4,6 +4,7 @@ test_format = 1.0
 
 [default]
 
+    args.public_key = ""
     # -------------------------------
     # Commits to test upgrade from
     # -------------------------------