diff --git a/pkg/crypto/keys/publickey_test.go b/pkg/crypto/keys/publickey_test.go
index 199577d6e..b35784bbf 100644
--- a/pkg/crypto/keys/publickey_test.go
+++ b/pkg/crypto/keys/publickey_test.go
@@ -5,49 +5,76 @@ import (
 	"testing"
 
 	"github.com/CityOfZion/neo-go/pkg/io"
-	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestEncodeDecodeInfinity(t *testing.T) {
 	key := &PublicKey{}
 	buf := io.NewBufBinWriter()
 	key.EncodeBinary(buf.BinWriter)
-	assert.Nil(t, buf.Err)
+	require.NoError(t, buf.Err)
 	b := buf.Bytes()
-	assert.Equal(t, 1, len(b))
+	require.Equal(t, 1, len(b))
 
 	keyDecode := &PublicKey{}
-	assert.Nil(t, keyDecode.DecodeBytes(b))
-	assert.Equal(t, []byte{0x00}, keyDecode.Bytes())
+	require.NoError(t, keyDecode.DecodeBytes(b))
+	require.Equal(t, []byte{0x00}, keyDecode.Bytes())
 }
 
 func TestEncodeDecodePublicKey(t *testing.T) {
 	for i := 0; i < 4; i++ {
 		k, err := NewPrivateKey()
-		assert.Nil(t, err)
+		require.NoError(t, err)
 		p := k.PublicKey()
 		buf := io.NewBufBinWriter()
 		p.EncodeBinary(buf.BinWriter)
-		assert.Nil(t, buf.Err)
+		require.NoError(t, buf.Err)
 		b := buf.Bytes()
 
 		pDecode := &PublicKey{}
-		assert.Nil(t, pDecode.DecodeBytes(b))
-		assert.Equal(t, p.X, pDecode.X)
+		require.NoError(t, pDecode.DecodeBytes(b))
+		require.Equal(t, p.X, pDecode.X)
 	}
 }
 
 func TestDecodeFromString(t *testing.T) {
 	str := "03b209fd4f53a7170ea4444e0cb0a6bb6a53c2bd016926989cf85f9b0fba17a70c"
 	pubKey, err := NewPublicKeyFromString(str)
-	assert.Nil(t, err)
-	assert.Equal(t, str, hex.EncodeToString(pubKey.Bytes()))
+	require.NoError(t, err)
+	require.Equal(t, str, hex.EncodeToString(pubKey.Bytes()))
 }
 
 func TestPubkeyToAddress(t *testing.T) {
 	pubKey, err := NewPublicKeyFromString("031ee4e73a17d8f76dc02532e2620bcb12425b33c0c9f9694cc2caa8226b68cad4")
-	assert.Nil(t, err)
+	require.NoError(t, err)
 	actual := pubKey.Address()
 	expected := "AUpGsNCHzSimeMRVPQfhwrVdiUp8Q2N2Qx"
-	assert.Equal(t, expected, actual)
+	require.Equal(t, expected, actual)
+}
+
+func TestDecodeBytes(t *testing.T) {
+	pubKey := getPubKey(t)
+	decodedPubKey := &PublicKey{}
+	err := decodedPubKey.DecodeBytes(pubKey.Bytes())
+	require.NoError(t, err)
+	require.Equal(t, pubKey,decodedPubKey)
+}
+
+func TestContains(t *testing.T) {
+	pubKey := getPubKey(t)
+	pubKeys := &PublicKeys{getPubKey(t)}
+	pubKeys.Contains(pubKey)
+	require.True(t, pubKeys.Contains(pubKey))
+}
+
+func TestUnique(t *testing.T) {
+	pubKeys := &PublicKeys{getPubKey(t), getPubKey(t)}
+	unique := pubKeys.Unique()
+	require.Equal(t, 1, unique.Len())
+}
+
+func getPubKey(t *testing.T) *PublicKey {
+	pubKey, err := NewPublicKeyFromString("031ee4e73a17d8f76dc02532e2620bcb12425b33c0c9f9694cc2caa8226b68cad4")
+	require.NoError(t, err)
+	return pubKey
 }