Since summer 19,
sfdx force:source:deploy allows us to push source format meta-data into static orgs and production. The Commands are introduced here
However when I check the help of
sfdx force:source:deploy, it seems the lowest number of Apex tests that you can run is
Is it possible to set it to run only specific apex tests when deploying into a production org?
Now with the latest sfdx update(7.21.0) you can run 'sfdx force:source:deploy' command with specific test classes. Check below command.