diff --git a/lib/init.spec.lua b/lib/init.spec.lua
index ed333b6..85a4691 100644
--- a/lib/init.spec.lua
+++ b/lib/init.spec.lua
@@ -9,7 +9,7 @@ return function()
 		assert(t.type("table")({}))
 		assert(t.type("userdata")(newproxy()))
 		assert(t.type("function")(function() end))
-		assert(t.type("thread")(coroutine.running()))
+		assert(t.type("thread")(coroutine.create(nction() end)))
 
 		assert(not t.type("nil")(true))
 		assert(not t.type("boolean")("true"))