spell totems + duration spell + increased duration passives: does it work?

Hey guys,

Trying to figure out if spell totem + a duration spell like firestorm + increased duration from the passives increase the duration of the firestorm casted by the totem. I know it wont increase totem duration. The tool tip changes but I don't trust it 100% as it also doesn't take into consideration things like the totem reduced cast speed.

Thanks!

Increased skill effect duration should increase both the duration of the totems and the duration of the firestorm.

When I was using a SRS totem it increased both the duration of the totem and the duration of the SRS.

I expect fire storm would be the same.