diff --git a/tests/test.lua b/tests/test.lua
index abfbd4d..5872717 100644
--- a/tests/test.lua
+++ b/tests/test.lua
@@ -136,7 +136,10 @@ io.write(".")
 io.flush()
 
 -- Trying to get attributes of a non-existent file
-assert (lfs.attributes ("this couldn't be an actual file") == nil, "could get attributes of a non-existent file")
+local attr_ok, err, errno = lfs.attributes("this couldn't be an actual file")
+assert(attr_ok == nil, "could get attributes of a non-existent file")
+assert(type(err) == "string", "failed lfs.attributes did not return an error message")
+assert(type(errno) == "number", "failed lfs.attributes did not return error code")
 assert (type(lfs.attributes (upper)) == "table", "couldn't get attributes of upper directory")
 
 io.write(".")