ScalaTest 1.9.1 is source (but not necessarily binary) compatible with previous releases. To upgrade from 1.8, you should only need to do a clean build.
This release was created to accomdate changes forced by Scala 2.10 and sbt 0.12. As a result, from the user's perspective it differs from 1.8 by only one bug fix and two deprecations:
org.scalatest.concurrent.IntegrationPatienceto enable it to be mixed in as intended.
Assertions, and deprecated
expectwill be used for a different purpose in a future version of ScalaTest.
org.scalatest.matchersto ClassicMatchers and deprecated