With the annotation you get the possibility to reset your database.
See also the source code FlywayTest or a usage example UsageFlywaySpringTest.

• invokeCleanDB
  execute flyway command clean.
  Default value is true

• invokeBaselineDB
  execute flyway command baseline.
  Default value is false

• invokeMigrateDB
  execute flyway command migrate.
  Default value is true

• locationForMigrate
  extend the default directory with the list of directories.

• overrideLocations
  if it is set to true the content of locationsForMigrate will complete replace the search path for migration files.
  Default value is false