Execute Stored Procedure with SQL Task Action Failing (exec msdb.dbo.sp_start_job)

I am attempting this query with an Execute SQL action:

exec msdb.dbo.sp_start_job @job_name=test

And I get this error:

The execution returned an unexpected error.
The specified @job_name ('test') does not exist.

The same statement works when I run it using SSMS:

exec msdb.dbo.sp_start_job @job_name=test

result: Job 'test' started successfully.

I copied and pasted between SSMS and Nintex to be certain that I am using the exact same job name.

Any ideas would be appreciated. Thank you!