diff --git a/imagehash_test.go b/imagehash_test.go
index 7cf2538..77021a7 100644
--- a/imagehash_test.go
+++ b/imagehash_test.go
@@ -12,15 +12,15 @@ import (
 func TestNewImageHash(t *testing.T) {
 	for _, tt := range []struct {
 		datas    [][]uint8
-		hash1    hashKind
-		hash2    hashKind
+		hash1    Kind
+		hash2    Kind
 		distance int
 		err      error
 	}{
 		{[][]uint8{{1, 0, 1, 1}, {0, 0, 0, 0}}, Unknown, Unknown, 3, nil},
 		{[][]uint8{{0, 0, 0, 0}, {0, 0, 0, 0}}, Unknown, Unknown, 0, nil},
 		{[][]uint8{{0, 0, 0, 0}, {0, 0, 0, 1}}, Unknown, Unknown, 1, nil},
-		{[][]uint8{{0, 0, 0, 0}, {0, 0, 0, 1}}, Unknown, AHash, -1, errors.New("Image hashes's kind should be identical.")},
+		{[][]uint8{{0, 0, 0, 0}, {0, 0, 0, 1}}, Unknown, AHash, -1, errors.New("Image hashes's kind should be identical")},
 	} {
 		data1 := tt.datas[0]
 		data2 := tt.datas[1]