diff --git a/binaries/data/mods/public/simulation/components/tests/test_Attack.js b/binaries/data/mods/public/simulation/components/tests/test_Attack.js
index fd69000176..dd09ea97ea 100644
--- a/binaries/data/mods/public/simulation/components/tests/test_Attack.js
+++ b/binaries/data/mods/public/simulation/components/tests/test_Attack.js
@@ -34,7 +34,7 @@ function attackComponentTest(defenderClass, test_function)
 	});
 
 	AddMock(attacker, IID_Ownership, {
-		"GetOwner": owner => 1
+		"GetOwner": () => 1
 	});
 
 	let cmpAttack = ConstructComponent(attacker, "Attack", {