Another library to take a look at is shpec: https://github.com/rylnd/shpec

Tests are written in way that will be very familiar to rspec users:

describe "shpec"
  describe "basic operations"
    it "asserts equality"
      assert equal "foo" "foo"

    it "asserts inequality"
      assert unequal "foo" "bar"

    it "asserts less than"
      assert lt 5 7

    # ...

  end_describe
end_describe