I thought the "testing crate" was new stuff, but since all the posts here seem to be months old, maybe this is just "leftovers." Anyway, I bought the testing crate in the store, and all the weapons and mods have garbage text where the synergy descriptions should be, i.e.:

43856_STRING_MISSING
[1] 43857_STRING_MISSING
[2] 43858_STRING_MISSING
[3] 43859_STRING_MISSING
[4] 43860_STRING_MISSING