We need more information here.
Do you mean they flicker when you first turn them on, and then stop? If so live with it.
Or flicker all the time when they are on?
Or flicker when the switch is off?
I have a feeling it might be your wall switch. If you are using a dimmer they might flicker when they are on (assuming the other CFLs are dimmable). And if your wall switch has a light in it (like an LED) most fluorescent bulbs will flicker when they are off unless used with ordinary incandescent bulbs. The LED or light in the switch draws a small amount of current you see.
So give us more info.