The best replacement for black box is white box testing.

The best alternatives to black box are rated as following:
★★★★★  white box testing
★★★  white box
★★  bota box
★★  direct hit
★★  rocket launcher
★★  transponder
★  bota box wine
★  military classic
★  cow mangler 5000
★  glass box
★  liberty launcher
  green box
  flight recorder
  line 6 pod
  red box
  pod xt

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