diff --git a/store/state/base.go b/store/state/base.go
index f163c18b98a0..a6f429053248 100644
--- a/store/state/base.go
+++ b/store/state/base.go
@@ -15,13 +15,19 @@ type Base struct {
 }
 
 func EmptyBase() Base {
-	return NewBase(nil, nil)
+	return NewBase(nil, nil, nil)
 }
 
-func NewBase(cdc *codec.Codec, key sdk.StoreKey) Base {
+func NewBase(cdc *codec.Codec, key sdk.StoreKey, rootkey []byte) Base {
+	if len(rootkey) == 0 {
+		return Base{
+			cdc:     cdc,
+			storefn: func(ctx Context) KVStore { return ctx.KVStore(key) },
+		}
+	}
 	return Base{
 		cdc:     cdc,
-		storefn: func(ctx Context) KVStore { return ctx.KVStore(key) },
+		storefn: func(ctx Context) KVStore { return prefix.NewStore(ctx.KVStore(key), rootkey) },
 	}
 }
 
diff --git a/store/state/value_test.go b/store/state/value_test.go
index 24e4e708c458..e3c07e0e3968 100644
--- a/store/state/value_test.go
+++ b/store/state/value_test.go
@@ -14,7 +14,7 @@ type valuepair struct {
 
 func TestValue(t *testing.T) {
 	key, ctx, cdc := defaultComponents()
-	base := NewBase(cdc, key)
+	base := NewBase(cdc, key, nil)
 
 	cases := make([]valuepair, testsize)
 	for i := range cases {
diff --git a/x/ibc/02-client/manager.go b/x/ibc/02-client/manager.go
index 5d52613be9df..e94d14702b72 100644
--- a/x/ibc/02-client/manager.go
+++ b/x/ibc/02-client/manager.go
@@ -2,7 +2,6 @@ package client
 
 import (
 	"errors"
-	"fmt"
 	"strconv"
 
 	"github.com/cosmos/cosmos-sdk/store/state"
@@ -28,7 +27,6 @@ type Manager struct {
 }
 
 func NewManager(protocol, free state.Base, idgen IDGenerator) Manager {
-	fmt.Println(1234567890, protocol, free)
 	return Manager{
 		protocol: state.NewMapping(protocol, []byte("/client")),
 		idval:    state.NewValue(free, []byte("/client/id")),
diff --git a/x/ibc/03-connection/manager.go b/x/ibc/03-connection/manager.go
index 7c0668bc0dbd..3c12fe5851d6 100644
--- a/x/ibc/03-connection/manager.go
+++ b/x/ibc/03-connection/manager.go
@@ -2,7 +2,6 @@ package connection
 
 import (
 	"errors"
-	"fmt"
 
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/store/state"
@@ -71,7 +70,6 @@ func (man CounterpartyManager) object(id string) CounterObject {
 }
 
 func (man Manager) Create(ctx sdk.Context, id string, connection Connection) (obj Object, err error) {
-	fmt.Println("create", id, connection)
 	obj = man.object(id)
 	if obj.exists(ctx) {
 		err = errors.New("connection already exists for the provided id")
@@ -202,24 +200,20 @@ func (obj Object) OpenTry(ctx sdk.Context, expheight uint64, timeoutHeight, next
 		return errors.New("invalid state")
 	}
 
-	fmt.Println(12345)
 	err := assertTimeout(ctx, timeoutHeight)
 	if err != nil {
 		return err
 	}
 
-	fmt.Println(67890)
 	if !obj.counterparty.state.Is(ctx, Init) {
 		return errors.New("counterparty state not init")
 	}
-	fmt.Println(97)
 
 	err = obj.assertSymmetric(ctx)
 	if err != nil {
 		return err
 	}
 
-	fmt.Println(65)
 	if !obj.counterparty.nextTimeout.Is(ctx, uint64(timeoutHeight)) {
 		return errors.New("unexpected counterparty timeout value")
 	}
diff --git a/x/ibc/03-connection/tests/connection_test.go b/x/ibc/03-connection/tests/connection_test.go
index 4ff890630135..338218542322 100644
--- a/x/ibc/03-connection/tests/connection_test.go
+++ b/x/ibc/03-connection/tests/connection_test.go
@@ -1,7 +1,6 @@
 package connection
 
 import (
-	"fmt"
 	"testing"
 
 	"github.com/cosmos/cosmos-sdk/codec"
@@ -36,22 +35,31 @@ func TestHandshake(t *testing.T) {
 	node.Advance(t)
 	header := node.Commit()
 
-	fmt.Printf("ddd\n\n\n\n%+v\n", node.Root)
-
 	// counterparty.OpenTry
 	node.Counterparty.UpdateClient(t, header)
 	cliobj := node.CLIObject()
 	_, pconn := node.Query(t, cliobj.ConnectionKey)
-	fmt.Printf("\n\n\n\n%s: %+v, %s\n", cliobj.ConnectionKey, pconn.(merkle.Proof).Proof, string(pconn.(merkle.Proof).Key))
 	_, pstate := node.Query(t, cliobj.StateKey)
 	_, ptimeout := node.Query(t, cliobj.NextTimeoutKey)
 	// TODO: implement consensus state checking
 	// _, pclient := node.Query(t, cliobj.Client.ConsensusStateKey)
-	node.Advance(t, pconn, pstate, ptimeout)
+	node.Advance(t, pconn, pstate, ptimeout /*, pclient*/)
+	header = node.Counterparty.Commit()
 
 	// self.OpenAck
-	node.Advance(t)
+	node.UpdateClient(t, header)
+	cliobj = node.Counterparty.CLIObject()
+	_, pconn = node.Counterparty.Query(t, cliobj.ConnectionKey)
+	_, pstate = node.Counterparty.Query(t, cliobj.StateKey)
+	_, ptimeout = node.Counterparty.Query(t, cliobj.NextTimeoutKey)
+	node.Advance(t, pconn, pstate, ptimeout)
+	header = node.Commit()
 
 	// counterparty.OpenConfirm
-	node.Advance(t)
+	node.Counterparty.UpdateClient(t, header)
+	cliobj = node.CLIObject()
+	_, pconn = node.Query(t, cliobj.ConnectionKey) // TODO: check if it is needed
+	_, pstate = node.Query(t, cliobj.StateKey)
+	_, ptimeout = node.Query(t, cliobj.NextTimeoutKey)
+	node.Advance(t, pconn, pstate, ptimeout)
 }
diff --git a/x/ibc/03-connection/tests/types.go b/x/ibc/03-connection/tests/types.go
index 4a6d31a2f47e..18d941cad038 100644
--- a/x/ibc/03-connection/tests/types.go
+++ b/x/ibc/03-connection/tests/types.go
@@ -73,6 +73,11 @@ func (node *Node) UpdateClient(t *testing.T, header client.Header) {
 	require.NoError(t, err)
 }
 
+func (node *Node) SetState(state connection.State) {
+	node.State = state
+	node.Counterparty.State = state
+}
+
 func (node *Node) Object(t *testing.T, proofs []commitment.Proof) (sdk.Context, connection.Object) {
 	ctx := node.Context()
 	store, err := commitment.NewStore(node.Counterparty.Root, proofs)
@@ -80,7 +85,7 @@ func (node *Node) Object(t *testing.T, proofs []commitment.Proof) (sdk.Context,
 	ctx = commitment.WithStore(ctx, store)
 	_, man := node.Manager()
 	switch node.State {
-	case connection.Idle:
+	case connection.Idle, connection.Init:
 		obj, err := man.Create(ctx, node.Name, node.Connection)
 		require.NoError(t, err)
 		return ctx, obj
@@ -98,9 +103,8 @@ func (node *Node) CLIObject() connection.CLIObject {
 }
 
 func base(cdc *codec.Codec, key sdk.StoreKey) (state.Base, state.Base) {
-	base := state.NewBase(cdc, key)
-	protocol := base.Prefix([]byte("protocol"))
-	free := base.Prefix([]byte("free"))
+	protocol := state.NewBase(cdc, key, []byte("protocol"))
+	free := state.NewBase(cdc, key, []byte("free"))
 	return protocol, free
 }
 
@@ -112,6 +116,7 @@ func (node *Node) Manager() (client.Manager, connection.Manager) {
 
 func (node *Node) Advance(t *testing.T, proofs ...commitment.Proof) {
 	switch node.State {
+	// TODO: use different enum type for node.State
 	case connection.Idle: // self: Idle -> Init
 		ctx, obj := node.Object(t, proofs)
 		require.Equal(t, connection.Idle, obj.State(ctx))
@@ -119,7 +124,7 @@ func (node *Node) Advance(t *testing.T, proofs ...commitment.Proof) {
 		require.NoError(t, err)
 		require.Equal(t, connection.Init, obj.State(ctx))
 		require.Equal(t, node.Connection, obj.Connection(ctx))
-		node.State = connection.Init
+		node.SetState(connection.Init)
 	case connection.Init: // counter: Idle -> OpenTry
 		ctx, obj := node.Counterparty.Object(t, proofs)
 		require.Equal(t, connection.Idle, obj.State(ctx))
@@ -127,7 +132,7 @@ func (node *Node) Advance(t *testing.T, proofs ...commitment.Proof) {
 		require.NoError(t, err)
 		require.Equal(t, connection.OpenTry, obj.State(ctx))
 		require.Equal(t, node.Counterparty.Connection, obj.Connection(ctx))
-		node.State = connection.OpenTry
+		node.SetState(connection.OpenTry)
 	case connection.OpenTry: // self: Init -> Open
 		ctx, obj := node.Object(t, proofs)
 		require.Equal(t, connection.Init, obj.State(ctx))
@@ -135,7 +140,7 @@ func (node *Node) Advance(t *testing.T, proofs ...commitment.Proof) {
 		require.NoError(t, err)
 		require.Equal(t, connection.Open, obj.State(ctx))
 		require.Equal(t, node.Connection, obj.Connection(ctx))
-		node.State = connection.Open
+		node.SetState(connection.Open)
 	case connection.Open: // counter: OpenTry -> Open
 		ctx, obj := node.Counterparty.Object(t, proofs)
 		require.Equal(t, connection.OpenTry, obj.State(ctx))
@@ -143,8 +148,8 @@ func (node *Node) Advance(t *testing.T, proofs ...commitment.Proof) {
 		require.NoError(t, err)
 		require.Equal(t, connection.Open, obj.State(ctx))
 		require.Equal(t, node.Counterparty.Connection, obj.Connection(ctx))
-		node.State = connection.CloseTry
-	// case connection.CloseTry // self: Open -> CloseTry
+		node.SetState(connection.CloseTry)
+		// case connection.CloseTry // self: Open -> CloseTry
 	default:
 		return
 	}
diff --git a/x/ibc/23-commitment/store.go b/x/ibc/23-commitment/store.go
index 4a90426defcb..a5640db907c3 100644
--- a/x/ibc/23-commitment/store.go
+++ b/x/ibc/23-commitment/store.go
@@ -3,7 +3,6 @@ package commitment
 import (
 	"bytes"
 	"errors"
-	"fmt"
 )
 
 type Store interface {
@@ -54,12 +53,9 @@ func NewStore(root Root, proofs []Proof) (res *store, err error) {
 			err = errors.New("proof type not matching with root's")
 			return
 		}
-		fmt.Println("set key", string(proof.GetKey()))
 		res.proofs[string(proof.GetKey())] = proof
 	}
 
-	fmt.Printf("%+v\n", res)
-
 	return
 }
 
@@ -75,13 +71,10 @@ func (store *store) Prove(key, value []byte) bool {
 	}
 	proof, ok := store.proofs[string(key)]
 	if !ok {
-		fmt.Println("no proof")
-		fmt.Println("get key", string(key))
 		return false
 	}
 	err := proof.Verify(store.root, value)
 	if err != nil {
-		fmt.Println("invalid proof")
 		return false
 	}
 	store.verified[string(key)] = value