diff --git a/itests/deadlines_test.go b/itests/deadlines_test.go
index 9551465a5..3c8303ac0 100644
--- a/itests/deadlines_test.go
+++ b/itests/deadlines_test.go
@@ -3,7 +3,6 @@ package itests
 import (
 	"bytes"
 	"context"
-	"fmt"
 	"os"
 	"testing"
 	"time"
@@ -22,12 +21,11 @@ import (
 	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/extern/sector-storage/mock"
-	"github.com/filecoin-project/lotus/itests/kit"
+	"github.com/filecoin-project/lotus/itests/kit2"
 	"github.com/filecoin-project/lotus/node/impl"
 	miner2 "github.com/filecoin-project/specs-actors/v2/actors/builtin/miner"
 	"github.com/ipfs/go-cid"
 	cbor "github.com/ipfs/go-ipld-cbor"
-	logging "github.com/ipfs/go-log/v2"
 	"github.com/stretchr/testify/require"
 )
 
@@ -58,11 +56,8 @@ func TestDeadlineToggling(t *testing.T) {
 	if os.Getenv("LOTUS_TEST_DEADLINE_TOGGLING") != "1" {
 		t.Skip("this takes a few minutes, set LOTUS_TEST_DEADLINE_TOGGLING=1 to run")
 	}
-	_ = logging.SetLogLevel("miner", "ERROR")
-	_ = logging.SetLogLevel("chainstore", "ERROR")
-	_ = logging.SetLogLevel("chain", "ERROR")
-	_ = logging.SetLogLevel("sub", "ERROR")
-	_ = logging.SetLogLevel("storageminer", "FATAL")
+
+	kit2.QuietMiningLogs()
 
 	const sectorsC, sectorsD, sectorsB = 10, 9, 8
 
@@ -75,21 +70,26 @@ func TestDeadlineToggling(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
-	n, sn := kit.MockMinerBuilder(t, []kit.FullNodeOpts{kit.FullNodeWithNetworkUpgradeAt(network.Version12, upgradeH)}, kit.OneMiner)
+	var (
+		client kit2.TestFullNode
+		minerA kit2.TestMiner
+		minerB kit2.TestMiner
+		minerC kit2.TestMiner
+		minerD kit2.TestMiner
+		minerE kit2.TestMiner
+	)
+	opts := []kit2.NodeOpt{kit2.ConstructorOpts(kit2.NetworkUpgradeAt(network.Version12, upgradeH))}
+	ens := kit2.NewEnsemble(t, kit2.MockProofs()).
+		FullNode(&client, opts...).
+		Miner(&minerA, &client, opts...).
+		Start().
+		InterconnectAll()
+	ens.BeginMining(blocktime)
 
-	client := n[0].FullNode.(*impl.FullNodeAPI)
-	minerA := sn[0]
-
-	{
-		addrinfo, err := client.NetAddrsListen(ctx)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		if err := minerA.NetConnect(ctx, addrinfo); err != nil {
-			t.Fatal(err)
-		}
-	}
+	opts = append(opts, kit2.OwnerAddr(client.DefaultKey))
+	ens.Miner(&minerB, &client, opts...).
+		Miner(&minerC, &client, opts...).
+		Start()
 
 	defaultFrom, err := client.WalletDefaultAddress(ctx)
 	require.NoError(t, err)
@@ -99,28 +99,6 @@ func TestDeadlineToggling(t *testing.T) {
 
 	build.Clock.Sleep(time.Second)
 
-	done := make(chan struct{})
-	go func() {
-		defer close(done)
-		for ctx.Err() == nil {
-			build.Clock.Sleep(blocktime)
-			if err := minerA.MineOne(ctx, kit.MineNext); err != nil {
-				if ctx.Err() != nil {
-					// context was canceled, ignore the error.
-					return
-				}
-				t.Error(err)
-			}
-		}
-	}()
-	defer func() {
-		cancel()
-		<-done
-	}()
-
-	minerB := n[0].Stb(ctx, t, kit.TestSpt, defaultFrom)
-	minerC := n[0].Stb(ctx, t, kit.TestSpt, defaultFrom)
-
 	maddrB, err := minerB.ActorAddress(ctx)
 	require.NoError(t, err)
 	maddrC, err := minerC.ActorAddress(ctx)
@@ -131,20 +109,20 @@ func TestDeadlineToggling(t *testing.T) {
 
 	// pledge sectors on C, go through a PP, check for power
 	{
-		kit.PledgeSectors(t, ctx, minerC, sectorsC, 0, nil)
+		minerC.PledgeSectors(ctx, sectorsC, 0, nil)
 
 		di, err := client.StateMinerProvingDeadline(ctx, maddrC, types.EmptyTSK)
 		require.NoError(t, err)
 
-		fmt.Printf("Running one proving period (miner C)\n")
-		fmt.Printf("End for head.Height > %d\n", di.PeriodStart+di.WPoStProvingPeriod*2)
+		t.Log("Running one proving period (miner C)")
+		t.Logf("End for head.Height > %d", di.PeriodStart+di.WPoStProvingPeriod*2)
 
 		for {
 			head, err := client.ChainHead(ctx)
 			require.NoError(t, err)
 
 			if head.Height() > di.PeriodStart+provingPeriod*2 {
-				fmt.Printf("Now head.Height = %d\n", head.Height())
+				t.Logf("Now head.Height = %d", head.Height())
 				break
 			}
 			build.Clock.Sleep(blocktime)
@@ -165,7 +143,7 @@ func TestDeadlineToggling(t *testing.T) {
 		require.NoError(t, err)
 
 		if head.Height() > upgradeH+provingPeriod {
-			fmt.Printf("Now head.Height = %d\n", head.Height())
+			t.Logf("Now head.Height = %d", head.Height())
 			break
 		}
 		build.Clock.Sleep(blocktime)
@@ -216,8 +194,9 @@ func TestDeadlineToggling(t *testing.T) {
 	require.NoError(t, err)
 	require.GreaterOrEqual(t, nv, network.Version12)
 
-	minerD := n[0].Stb(ctx, t, kit.TestSpt, defaultFrom)
-	minerE := n[0].Stb(ctx, t, kit.TestSpt, defaultFrom)
+	ens.Miner(&minerD, &client, opts...).
+		Miner(&minerE, &client, opts...).
+		Start()
 
 	maddrD, err := minerD.ActorAddress(ctx)
 	require.NoError(t, err)
@@ -225,7 +204,7 @@ func TestDeadlineToggling(t *testing.T) {
 	require.NoError(t, err)
 
 	// first round of miner checks
-	checkMiner(maddrA, types.NewInt(uint64(ssz)*kit.GenesisPreseals), true, true, types.EmptyTSK)
+	checkMiner(maddrA, types.NewInt(uint64(ssz)*kit2.DefaultPresealsPerBootstrapMiner), true, true, types.EmptyTSK)
 	checkMiner(maddrC, types.NewInt(uint64(ssz)*sectorsC), true, true, types.EmptyTSK)
 
 	checkMiner(maddrB, types.NewInt(0), false, false, types.EmptyTSK)
@@ -233,10 +212,10 @@ func TestDeadlineToggling(t *testing.T) {
 	checkMiner(maddrE, types.NewInt(0), false, false, types.EmptyTSK)
 
 	// pledge sectors on minerB/minerD, stop post on minerC
-	kit.PledgeSectors(t, ctx, minerB, sectorsB, 0, nil)
+	minerB.PledgeSectors(ctx, sectorsB, 0, nil)
 	checkMiner(maddrB, types.NewInt(0), true, true, types.EmptyTSK)
 
-	kit.PledgeSectors(t, ctx, minerD, sectorsD, 0, nil)
+	minerD.PledgeSectors(ctx, sectorsD, 0, nil)
 	checkMiner(maddrD, types.NewInt(0), true, true, types.EmptyTSK)
 
 	minerC.StorageMiner.(*impl.StorageMinerAPI).IStorageMgr.(*mock.SectorMgr).Fail()
@@ -252,7 +231,7 @@ func TestDeadlineToggling(t *testing.T) {
 		params := &miner.SectorPreCommitInfo{
 			Expiration:   2880 * 300,
 			SectorNumber: 22,
-			SealProof:    kit.TestSpt,
+			SealProof:    kit2.TestSpt,
 
 			SealedCID:     cr,
 			SealRandEpoch: head.Height() - 200,
@@ -281,7 +260,7 @@ func TestDeadlineToggling(t *testing.T) {
 		require.NoError(t, err)
 
 		if head.Height() > upgradeH+provingPeriod+(provingPeriod/2) {
-			fmt.Printf("Now head.Height = %d\n", head.Height())
+			t.Logf("Now head.Height = %d", head.Height())
 			break
 		}
 		build.Clock.Sleep(blocktime)
@@ -295,14 +274,14 @@ func TestDeadlineToggling(t *testing.T) {
 		require.NoError(t, err)
 
 		if head.Height() > upgradeH+(provingPeriod*3) {
-			fmt.Printf("Now head.Height = %d\n", head.Height())
+			t.Logf("Now head.Height = %d", head.Height())
 			break
 		}
 		build.Clock.Sleep(blocktime)
 	}
 
 	// second round of miner checks
-	checkMiner(maddrA, types.NewInt(uint64(ssz)*kit.GenesisPreseals), true, true, types.EmptyTSK)
+	checkMiner(maddrA, types.NewInt(uint64(ssz)*kit2.DefaultPresealsPerBootstrapMiner), true, true, types.EmptyTSK)
 	checkMiner(maddrC, types.NewInt(0), true, true, types.EmptyTSK)
 	checkMiner(maddrB, types.NewInt(uint64(ssz)*sectorsB), true, true, types.EmptyTSK)
 	checkMiner(maddrD, types.NewInt(uint64(ssz)*sectorsD), true, true, types.EmptyTSK)
@@ -351,7 +330,7 @@ func TestDeadlineToggling(t *testing.T) {
 		}, nil)
 		require.NoError(t, err)
 
-		fmt.Println("sent termination message:", smsg.Cid())
+		t.Log("sent termination message:", smsg.Cid())
 
 		r, err := client.StateWaitMsg(ctx, smsg.Cid(), 2, api.LookbackNoLimit, true)
 		require.NoError(t, err)
@@ -367,13 +346,13 @@ func TestDeadlineToggling(t *testing.T) {
 		require.NoError(t, err)
 
 		if head.Height() > upgradeH+(provingPeriod*5) {
-			fmt.Printf("Now head.Height = %d\n", head.Height())
+			t.Logf("Now head.Height = %d", head.Height())
 			break
 		}
 		build.Clock.Sleep(blocktime)
 	}
 
-	checkMiner(maddrA, types.NewInt(uint64(ssz)*kit.GenesisPreseals), true, true, types.EmptyTSK)
+	checkMiner(maddrA, types.NewInt(uint64(ssz)*kit2.DefaultPresealsPerBootstrapMiner), true, true, types.EmptyTSK)
 	checkMiner(maddrC, types.NewInt(0), true, true, types.EmptyTSK)
 	checkMiner(maddrB, types.NewInt(0), true, true, types.EmptyTSK)
 	checkMiner(maddrD, types.NewInt(0), false, false, types.EmptyTSK)
diff --git a/itests/kit2/ensemble_opts.go b/itests/kit2/ensemble_opts.go
index f8bc81535..8c6d66d9e 100644
--- a/itests/kit2/ensemble_opts.go
+++ b/itests/kit2/ensemble_opts.go
@@ -23,8 +23,8 @@ type ensembleOpts struct {
 }
 
 var DefaultEnsembleOpts = ensembleOpts{
-	pastOffset: 10000000 * time.Second, // time sufficiently in the past to trigger catch-up mining.
-	proofType:  abi.RegisteredSealProof_StackedDrg2KiBV1,
+	pastOffset: 10000000 * time.Second,                     // time sufficiently in the past to trigger catch-up mining.
+	proofType:  abi.RegisteredSealProof_StackedDrg2KiBV1_1, // default _concrete_ proof type for non-genesis miners (notice the _1).
 }
 
 func ProofType(proofType abi.RegisteredSealProof) EnsembleOpt {
diff --git a/itests/kit2/node_opts.go b/itests/kit2/node_opts.go
index 59d5454df..39c6cb809 100644
--- a/itests/kit2/node_opts.go
+++ b/itests/kit2/node_opts.go
@@ -14,6 +14,8 @@ import (
 // PresealSectors option.
 const DefaultPresealsPerBootstrapMiner = 2
 
+const TestSpt = abi.RegisteredSealProof_StackedDrg2KiBV1_1
+
 // nodeOpts is an options accumulating struct, where functional options are
 // merged into.
 type nodeOpts struct {
diff --git a/itests/kit2/node_opts_nv.go b/itests/kit2/node_opts_nv.go
index 39de9d9e2..5ffd94f5e 100644
--- a/itests/kit2/node_opts_nv.go
+++ b/itests/kit2/node_opts_nv.go
@@ -87,5 +87,4 @@ func SDRUpgradeAt(calico, persian abi.ChainEpoch) node.Option {
 		Network: network.Version8,
 		Height:  persian,
 	}})
-
 }