diff --git a/build/params_testnet.go b/build/params_testnet.go
index c222862eb..202dfb231 100644
--- a/build/params_testnet.go
+++ b/build/params_testnet.go
@@ -12,9 +12,8 @@ import (
 )
 
 func init() {
-	power.ConsensusMinerMinPower = big.NewInt(1024 << 20)
+	power.ConsensusMinerMinPower = big.NewInt(1024 << 30)
 	miner.SupportedProofTypes = map[abi.RegisteredSealProof]struct{}{
-		abi.RegisteredSealProof_StackedDrg512MiBV1: {},
 		abi.RegisteredSealProof_StackedDrg32GiBV1:  {},
 		abi.RegisteredSealProof_StackedDrg64GiBV1:  {},
 	}