diff --git a/spec/factories/captain/scenario.rb b/spec/factories/captain/scenario.rb
index 937106f58..fc9149bfa 100644
--- a/spec/factories/captain/scenario.rb
+++ b/spec/factories/captain/scenario.rb
@@ -3,9 +3,9 @@ FactoryBot.define do
     sequence(:title) { |n| "Scenario #{n}" }
     description { 'Test scenario description' }
     instruction { 'Test scenario instruction for the assistant to follow' }
-    tools { nil }
+    tools { [] }
     enabled { true }
     association :assistant, factory: :captain_assistant
     association :account
   end
-end
\ No newline at end of file
+end