The Best Scrum Masters…
"The best Scrum Masters are also good software engineers. The Scrum Master helps the team improve its engineering practices, just as a coach teaches a team to play better." -- Ken Schwaber (co-creator of Scrum) As Scrum Master, you must make judgements on a team's engineering practices (or lack thereof). BDD (Behavior-Driven Development) , TDD (Test-Driven Development) and Test Automation are examples of best engineering practices that SAFe 4.6 is evangelizing... that best Scrum Masters are aware of and helping the team improve by adopting these software engineering practices.