diff --git a/pkg/core/dao_test.go b/pkg/core/dao_test.go
index 7c014cfe7..5aa44fe9f 100644
--- a/pkg/core/dao_test.go
+++ b/pkg/core/dao_test.go
@@ -5,9 +5,9 @@ import (
 
 	"github.com/CityOfZion/neo-go/pkg/core/state"
 	"github.com/CityOfZion/neo-go/pkg/core/storage"
-	"github.com/CityOfZion/neo-go/pkg/core/testutil"
 	"github.com/CityOfZion/neo-go/pkg/core/transaction"
 	"github.com/CityOfZion/neo-go/pkg/crypto/keys"
+	"github.com/CityOfZion/neo-go/pkg/internal/random"
 	"github.com/CityOfZion/neo-go/pkg/io"
 	"github.com/CityOfZion/neo-go/pkg/smartcontract"
 	"github.com/CityOfZion/neo-go/pkg/vm/opcode"
@@ -16,7 +16,7 @@ import (
 
 func TestPutGetAndDecode(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	serializable := &TestSerializable{field: testutil.RandomString(4)}
+	serializable := &TestSerializable{field: random.String(4)}
 	hash := []byte{1}
 	err := dao.Put(serializable, hash)
 	require.NoError(t, err)
@@ -41,7 +41,7 @@ func (t *TestSerializable) DecodeBinary(reader *io.BinReader) {
 
 func TestGetAccountStateOrNew_New(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint160()
+	hash := random.Uint160()
 	createdAccount, err := dao.GetAccountStateOrNew(hash)
 	require.NoError(t, err)
 	require.NotNil(t, createdAccount)
@@ -52,7 +52,7 @@ func TestGetAccountStateOrNew_New(t *testing.T) {
 
 func TestPutAndGetAccountStateOrNew(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint160()
+	hash := random.Uint160()
 	accountState := &state.Account{ScriptHash: hash}
 	err := dao.PutAccountState(accountState)
 	require.NoError(t, err)
@@ -63,7 +63,7 @@ func TestPutAndGetAccountStateOrNew(t *testing.T) {
 
 func TestPutAndGetAssetState(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	id := testutil.RandomUint256()
+	id := random.Uint256()
 	assetState := &state.Asset{ID: id, Owner: keys.PublicKey{}}
 	err := dao.PutAssetState(assetState)
 	require.NoError(t, err)
@@ -98,7 +98,7 @@ func TestDeleteContractState(t *testing.T) {
 
 func TestGetUnspentCoinStateOrNew_New(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	unspentCoinState, err := dao.GetUnspentCoinStateOrNew(hash)
 	require.NoError(t, err)
 	require.NotNil(t, unspentCoinState)
@@ -109,7 +109,7 @@ func TestGetUnspentCoinStateOrNew_New(t *testing.T) {
 
 func TestGetUnspentCoinState_Err(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	gotUnspentCoinState, err := dao.GetUnspentCoinState(hash)
 	require.Error(t, err)
 	require.Nil(t, gotUnspentCoinState)
@@ -117,7 +117,7 @@ func TestGetUnspentCoinState_Err(t *testing.T) {
 
 func TestPutGetUnspentCoinState(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	unspentCoinState := &UnspentCoinState{states:[]state.Coin{}}
 	err := dao.PutUnspentCoinState(hash, unspentCoinState)
 	require.NoError(t, err)
@@ -128,7 +128,7 @@ func TestPutGetUnspentCoinState(t *testing.T) {
 
 func TestGetSpentCoinStateOrNew_New(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	spentCoinState, err := dao.GetSpentCoinsOrNew(hash)
 	require.NoError(t, err)
 	require.NotNil(t, spentCoinState)
@@ -139,7 +139,7 @@ func TestGetSpentCoinStateOrNew_New(t *testing.T) {
 
 func TestPutAndGetSpentCoinState(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	spentCoinState := &SpentCoinState{items:make(map[uint16]uint32)}
 	err := dao.PutSpentCoinState(hash, spentCoinState)
 	require.NoError(t, err)
@@ -150,7 +150,7 @@ func TestPutAndGetSpentCoinState(t *testing.T) {
 
 func TestGetSpentCoinState_Err(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	spentCoinState, err := dao.GetSpentCoinState(hash)
 	require.Error(t, err)
 	require.Nil(t, spentCoinState)
@@ -158,7 +158,7 @@ func TestGetSpentCoinState_Err(t *testing.T) {
 
 func TestDeleteSpentCoinState(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	spentCoinState := &SpentCoinState{items:make(map[uint16]uint32)}
 	err := dao.PutSpentCoinState(hash, spentCoinState)
 	require.NoError(t, err)
@@ -229,7 +229,7 @@ func TestGetValidators(t *testing.T) {
 
 func TestPutGetAppExecResult(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	appExecResult := &state.AppExecResult{TxHash: hash, Events:[]state.NotificationEvent{}}
 	err := dao.PutAppExecResult(appExecResult)
 	require.NoError(t, err)
@@ -240,7 +240,7 @@ func TestPutGetAppExecResult(t *testing.T) {
 
 func TestPutGetStorageItem(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint160()
+	hash := random.Uint160()
 	key := []byte{0}
 	storageItem := &state.StorageItem{Value: []uint8{}}
 	err := dao.PutStorageItem(hash, key, storageItem)
@@ -251,7 +251,7 @@ func TestPutGetStorageItem(t *testing.T) {
 
 func TestDeleteStorageItem(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint160()
+	hash := random.Uint160()
 	key := []byte{0}
 	storageItem := &state.StorageItem{Value: []uint8{}}
 	err := dao.PutStorageItem(hash, key, storageItem)
@@ -264,7 +264,7 @@ func TestDeleteStorageItem(t *testing.T) {
 
 func TestGetBlock_NotExists(t *testing.T) {
 	dao := &dao{store: storage.NewMemCachedStore(storage.NewMemoryStore())}
-	hash := testutil.RandomUint256()
+	hash := random.Uint256()
 	block, err := dao.GetBlock(hash)
 	require.Error(t, err)
 	require.Nil(t, block)
diff --git a/pkg/core/interop_neo_test.go b/pkg/core/interop_neo_test.go
index 9cf07369e..ffe48a92f 100644
--- a/pkg/core/interop_neo_test.go
+++ b/pkg/core/interop_neo_test.go
@@ -6,9 +6,9 @@ import (
 
 	"github.com/CityOfZion/neo-go/pkg/core/state"
 	"github.com/CityOfZion/neo-go/pkg/core/storage"
-	"github.com/CityOfZion/neo-go/pkg/core/testutil"
 	"github.com/CityOfZion/neo-go/pkg/core/transaction"
 	"github.com/CityOfZion/neo-go/pkg/crypto/keys"
+	"github.com/CityOfZion/neo-go/pkg/internal/random"
 	"github.com/CityOfZion/neo-go/pkg/smartcontract"
 	"github.com/CityOfZion/neo-go/pkg/smartcontract/trigger"
 	"github.com/CityOfZion/neo-go/pkg/util"
@@ -349,10 +349,10 @@ func createVMAndAssetState(t *testing.T) (*vm.VM, *state.Asset, *interopContext)
 		Available:  2,
 		Precision:  1,
 		FeeMode:    1,
-		FeeAddress: testutil.RandomUint160(),
+		FeeAddress: random.Uint160(),
 		Owner:      keys.PublicKey{X: big.NewInt(1), Y: big.NewInt(1)},
-		Admin:      testutil.RandomUint160(),
-		Issuer:     testutil.RandomUint160(),
+		Admin:      random.Uint160(),
+		Issuer:     random.Uint160(),
 		Expiration: 10,
 		IsFrozen:   false,
 	}
@@ -368,11 +368,11 @@ func createVMAndContractState(t *testing.T) (*vm.VM, *state.Contract, *interopCo
 		ParamList:   []smartcontract.ParamType{smartcontract.StringType, smartcontract.IntegerType, smartcontract.Hash160Type},
 		ReturnType:  smartcontract.ArrayType,
 		Properties:  smartcontract.HasStorage,
-		Name:        testutil.RandomString(10),
-		CodeVersion: testutil.RandomString(10),
-		Author:      testutil.RandomString(10),
-		Email:       testutil.RandomString(10),
-		Description: testutil.RandomString(10),
+		Name:        random.String(10),
+		CodeVersion: random.String(10),
+		Author:      random.String(10),
+		Email:       random.String(10),
+		Description: random.String(10),
 	}
 
 	context := newInteropContext(trigger.Application, newTestChain(t), storage.NewMemoryStore(), nil, nil)
@@ -404,14 +404,14 @@ func createVMAndTX(t *testing.T) (*vm.VM, *transaction.Transaction, *interopCont
 	})
 
 	inputs := append(tx.Inputs, transaction.Input{
-		PrevHash:  testutil.RandomUint256(),
+		PrevHash:  random.Uint256(),
 		PrevIndex: 1,
 	})
 
 	outputs := append(tx.Outputs, transaction.Output{
-		AssetID:    testutil.RandomUint256(),
+		AssetID:    random.Uint256(),
 		Amount:     10,
-		ScriptHash: testutil.RandomUint160(),
+		ScriptHash: random.Uint160(),
 		Position:   1,
 	})
 
diff --git a/pkg/core/spent_coin_state_test.go b/pkg/core/spent_coin_state_test.go
index 0e3b65474..ec8176130 100644
--- a/pkg/core/spent_coin_state_test.go
+++ b/pkg/core/spent_coin_state_test.go
@@ -3,14 +3,14 @@ package core
 import (
 	"testing"
 
-	"github.com/CityOfZion/neo-go/pkg/core/testutil"
+	"github.com/CityOfZion/neo-go/pkg/internal/random"
 	"github.com/CityOfZion/neo-go/pkg/io"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestEncodeDecodeSpentCoinState(t *testing.T) {
 	spent := &SpentCoinState{
-		txHash:   testutil.RandomUint256(),
+		txHash:   random.Uint256(),
 		txHeight: 1001,
 		items: map[uint16]uint32{
 			1: 3,
diff --git a/pkg/core/state/account_test.go b/pkg/core/state/account_test.go
index e59215f3b..3981222f7 100644
--- a/pkg/core/state/account_test.go
+++ b/pkg/core/state/account_test.go
@@ -3,8 +3,8 @@ package state
 import (
 	"testing"
 
-	"github.com/CityOfZion/neo-go/pkg/core/testutil"
 	"github.com/CityOfZion/neo-go/pkg/crypto/keys"
+	"github.com/CityOfZion/neo-go/pkg/internal/random"
 	"github.com/CityOfZion/neo-go/pkg/io"
 	"github.com/CityOfZion/neo-go/pkg/util"
 	"github.com/stretchr/testify/assert"
@@ -17,12 +17,12 @@ func TestDecodeEncodeAccountState(t *testing.T) {
 		votes    = make([]*keys.PublicKey, n)
 	)
 	for i := 0; i < n; i++ {
-		asset := testutil.RandomUint256()
+		asset := random.Uint256()
 		for j := 0; j < i+1; j++ {
 			balances[asset] = append(balances[asset], UnspentBalance{
-				Tx:    testutil.RandomUint256(),
-				Index: uint16(testutil.RandomInt(0, 65535)),
-				Value: util.Fixed8(int64(testutil.RandomInt(1, 10000))),
+				Tx:    random.Uint256(),
+				Index: uint16(random.Int(0, 65535)),
+				Value: util.Fixed8(int64(random.Int(1, 10000))),
 			})
 		}
 		k, err := keys.NewPrivateKey()
@@ -32,7 +32,7 @@ func TestDecodeEncodeAccountState(t *testing.T) {
 
 	a := &Account{
 		Version:    0,
-		ScriptHash: testutil.RandomUint160(),
+		ScriptHash: random.Uint160(),
 		IsFrozen:   true,
 		Votes:      votes,
 		Balances:   balances,
@@ -58,8 +58,8 @@ func TestDecodeEncodeAccountState(t *testing.T) {
 }
 
 func TestAccountStateBalanceValues(t *testing.T) {
-	asset1 := testutil.RandomUint256()
-	asset2 := testutil.RandomUint256()
+	asset1 := random.Uint256()
+	asset2 := random.Uint256()
 	as := Account{Balances: make(map[util.Uint256][]UnspentBalance)}
 	ref := 0
 	for i := 0; i < 10; i++ {
diff --git a/pkg/core/state/asset_test.go b/pkg/core/state/asset_test.go
index 790ba4f68..5a0a1daed 100644
--- a/pkg/core/state/asset_test.go
+++ b/pkg/core/state/asset_test.go
@@ -3,9 +3,9 @@ package state
 import (
 	"testing"
 
-	"github.com/CityOfZion/neo-go/pkg/core/testutil"
 	"github.com/CityOfZion/neo-go/pkg/core/transaction"
 	"github.com/CityOfZion/neo-go/pkg/crypto/keys"
+	"github.com/CityOfZion/neo-go/pkg/internal/random"
 	"github.com/CityOfZion/neo-go/pkg/io"
 	"github.com/CityOfZion/neo-go/pkg/util"
 	"github.com/stretchr/testify/assert"
@@ -13,7 +13,7 @@ import (
 
 func TestEncodeDecodeAssetState(t *testing.T) {
 	asset := &Asset{
-		ID:         testutil.RandomUint256(),
+		ID:         random.Uint256(),
 		AssetType:  transaction.Token,
 		Name:       "super cool token",
 		Amount:     util.Fixed8(1000000),
@@ -21,8 +21,8 @@ func TestEncodeDecodeAssetState(t *testing.T) {
 		Precision:  0,
 		FeeMode:    feeMode,
 		Owner:      keys.PublicKey{},
-		Admin:      testutil.RandomUint160(),
-		Issuer:     testutil.RandomUint160(),
+		Admin:      random.Uint160(),
+		Issuer:     random.Uint160(),
 		Expiration: 10,
 		IsFrozen:   false,
 	}
diff --git a/pkg/core/state/notification_event_test.go b/pkg/core/state/notification_event_test.go
index 7b41859c3..0e92ae898 100644
--- a/pkg/core/state/notification_event_test.go
+++ b/pkg/core/state/notification_event_test.go
@@ -3,14 +3,14 @@ package state
 import (
 	"testing"
 
-	"github.com/CityOfZion/neo-go/pkg/core/testutil"
+	"github.com/CityOfZion/neo-go/pkg/internal/random"
 	"github.com/CityOfZion/neo-go/pkg/io"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestEncodeDecodeNotificationEvent(t *testing.T) {
 	event := &NotificationEvent{
-		ScriptHash: testutil.RandomUint160(),
+		ScriptHash: random.Uint160(),
 		Item:       nil,
 	}
 
@@ -26,7 +26,7 @@ func TestEncodeDecodeNotificationEvent(t *testing.T) {
 
 func TestEncodeDecodeAppExecResult(t *testing.T) {
 	appExecResult := &AppExecResult{
-		TxHash:      testutil.RandomUint256(),
+		TxHash:      random.Uint256(),
 		Trigger:     1,
 		VMState:     "Hault",
 		GasConsumed: 10,
diff --git a/pkg/core/testutil/random_util.go b/pkg/core/testutil/random_util.go
deleted file mode 100644
index c58832e89..000000000
--- a/pkg/core/testutil/random_util.go
+++ /dev/null
@@ -1,40 +0,0 @@
-package testutil
-
-import (
-	"math/rand"
-	"time"
-
-	"github.com/CityOfZion/neo-go/pkg/crypto/hash"
-	"github.com/CityOfZion/neo-go/pkg/util"
-)
-
-// RandomString returns a random string with the n as its length.
-func RandomString(n int) string {
-	b := make([]byte, n)
-	for i := range b {
-		b[i] = byte(RandomInt(65, 90))
-	}
-
-	return string(b)
-}
-
-// RandomInt returns a random integer in [min,max).
-func RandomInt(min, max int) int {
-	return min + rand.Intn(max-min)
-}
-
-// RandomUint256 returns a random Uint256.
-func RandomUint256() util.Uint256 {
-	str := RandomString(20)
-	return hash.Sha256([]byte(str))
-}
-
-// RandomUint160 returns a random Uint160.
-func RandomUint160() util.Uint160 {
-	str := RandomString(20)
-	return hash.RipeMD160([]byte(str))
-}
-
-func init() {
-	rand.Seed(time.Now().UTC().UnixNano())
-}
diff --git a/pkg/internal/random/random_util.go b/pkg/internal/random/random_util.go
new file mode 100644
index 000000000..d07e4da50
--- /dev/null
+++ b/pkg/internal/random/random_util.go
@@ -0,0 +1,40 @@
+package random
+
+import (
+	"math/rand"
+	"time"
+
+	"github.com/CityOfZion/neo-go/pkg/crypto/hash"
+	"github.com/CityOfZion/neo-go/pkg/util"
+)
+
+// String returns a random string with the n as its length.
+func String(n int) string {
+	b := make([]byte, n)
+	for i := range b {
+		b[i] = byte(Int(65, 90))
+	}
+
+	return string(b)
+}
+
+// Int returns a random integer in [min,max).
+func Int(min, max int) int {
+	return min + rand.Intn(max-min)
+}
+
+// Uint256 returns a random Uint256.
+func Uint256() util.Uint256 {
+	str := String(20)
+	return hash.Sha256([]byte(str))
+}
+
+// Uint160 returns a random Uint160.
+func Uint160() util.Uint160 {
+	str := String(20)
+	return hash.RipeMD160([]byte(str))
+}
+
+func init() {
+	rand.Seed(time.Now().UTC().UnixNano())
+}