Listen to Testament on iHeartRadio

Thrash metal vets Testament will have a new lineup when they return to the stage next month. 

The band announced Monday that they've mutually parted ways with bassist Greg Christian.  Christian was an original member of Testament when the group came together in 1983.  He left the band for almost a decade in the mid-'90s and was temporarily replaced by Sadus and Death bassist Steve DiGiorgio. 

Now, Testament is once again bringing DiGiorgio back into the fold to take over for Christian.  The new-look Testament will kick off their 2014 touring cycle with an Australian trek in February. 

Photo Credit Getty Images