t/op/universal.t See if UNIVERSAL class works
t/op/unshift.t See if unshift works
t/op/upgrade.t See if upgrading and assigning scalars works
+t/op/utf8cache.t Tests malfunctions of utf8 cache
t/op/utf8decode.t See if UTF-8 decoding works
t/op/utfhash.t See if utf8 keys in hashes behave
t/op/utftaint.t See if utf8 and taint work together