Can't run a test under vows?

I'm trying to follow the unit testing scheme on an open source project, and I don't entirely understand what I'm doing wrong. I have the following:

vows    = require 'vows'
assert  = require 'assert'
phantom = require '../phantom'

describe = (name, bat) -> vows.describe(name).addBatch(bat).run()

# Make coffeescript not return anything
# This is needed because vows topics do different things if you have a return value
t = (fn) ->
  ->
    fn.apply this, arguments
    return

describe "The phantom module (error behavior)",
  "Cannot create an instance at a nonexistent path":
    topic: t ->
      phantom.create {port: 12302, path: "./test/dir-does-not-exist"}, (ph, err) =>
        @callback null, [ph, err]

      "which is null": ([ph, err]) ->
        assert.isNull ph

Before, I had addBatch(bat).export(module), which followed the style of existing tests, but when I tried to run the whole thing, all it printed was:

vows runner running The phantom module (error behavior)

and nothing else. So I changed it to .run() in order to run it as an individual file, and instead I get

➜  phantomjs-node git:(master) ✗ coffee test/error.coffee 
Could not find any tests to run.%

I believe that I'm following the docs, which say that

vows.describe('subject').addBatch({/* ... */}).run();

is "the simplest way to run a test suite." My test follows the same format as the existing tests, so I assume that the body of my batch is fine.

What am I doing wrong?