that's a lot of versions :D
idk when this would have changed, good chance it's some random refactor that expected there to only be a single task name
... can you try a few inbetween versions to narrow it down to 1 specific version ?
... or check the code for a place where we should add a task.split(" ").each { |task|

Wasn't this on purpose?
I remember stalling for a while on upgrading the gem because of pull #857 in the 3.9 release

Yes, I've checked. It's 3.9.0

Soo, how to execute this command now? Write a cycle in sh?

the api you are using seems valid, so we should change the code to support it

this could do it:

      ParallelTests::Tasks.run_in_parallel([ParallelTests::Tasks.rake_bin, task_name], args)
->
      ParallelTests::Tasks.run_in_parallel([ParallelTests::Tasks.rake_bin, *task_name.split(" ")], args)

can you try that locally ?

Using 4.6.1

I'm more thinking bundle open parallel_tests and then change the source and retry
if it's tricky/not-working I can take a look soon ™️

Sorry, I don't understand what needs to be done. So help with this please

run bundle open parallel_tests and change that line in lib/parallel_tests/tasks.rb then try again
if this you get stuck I'll try to reproduce/fix later, just stay on old version a bit longer ...

1. Initial fix
   

2. Changed rake_bin to rails_env
   

3. Changed task_name to args.command
   

kk, I'll take a look when I can find some time 👍

@lunulu does #955 work / look right ?

I'm sorry, I completely forgot about this issue.

It works! Thank you very much

bundle exec rake parallel:rake["db:create db:schema:load db:migrate db:test:prepare pg_log:create pg_log:schema:load"] RAILS_ENV=test 
Database 'db_test' already exists
...

And this one too

bundle exec rake parallel:rake["time:zones[US] stats",1]

* UTC -10:00 *
America/Adak
...

Also noticed, that ,1 is space sensitive:

bundle exec rake parallel:rake["time:zones[US] stats", 2]
rake aborted!
Don't know how to build task 'parallel:rake[time:zones[US] stats,' (See the list of available tasks with `rake --tasks`)

But I don't think it's a problem

thx for the update!