How to rerun ScalaCheck Commands tests given a seed

Question

I have a scalacheck Commands test suite. When I run it it fails in a particularly interesting way, and prints out a seed. I would like to re-run the tests with that seed.

I've tried the following:

• sbt Test/runMain MyTest -initialSeed <the seed>
• Stub extends Properties { propertyWithSeed("lol", <the seed>) = MyCommands.property() (instead of calling just property("lol") = MyCommands.property())
• In Stub extends Properties { ... }, define a overrideParameters(p: Test.Parameters): Test.Parameters in which I override the initial seed parameters on p.

In all cases, I seem to get a new random seed.

Why is this, and how can I replay Commands tests with my favorite failing seed?