diff --git a/internal/howmuch/usecase/usecase/testdb.go b/internal/howmuch/usecase/usecase/repomock/testdbrepo.go
similarity index 98%
rename from internal/howmuch/usecase/usecase/testdb.go
rename to internal/howmuch/usecase/usecase/repomock/testdbrepo.go
index e0a062a..b24397b 100644
--- a/internal/howmuch/usecase/usecase/testdb.go
+++ b/internal/howmuch/usecase/usecase/repomock/testdbrepo.go
@@ -20,7 +20,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-package usecase
+package repomock
 
 import "context"
 
diff --git a/internal/howmuch/usecase/usecase/testuser.go b/internal/howmuch/usecase/usecase/repomock/testuserrepo.go
similarity index 99%
rename from internal/howmuch/usecase/usecase/testuser.go
rename to internal/howmuch/usecase/usecase/repomock/testuserrepo.go
index 7da234f..480cfb5 100644
--- a/internal/howmuch/usecase/usecase/testuser.go
+++ b/internal/howmuch/usecase/usecase/repomock/testuserrepo.go
@@ -20,7 +20,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-package usecase
+package repomock
 
 import (
 	"context"
diff --git a/internal/howmuch/usecase/usecase/user_test.go b/internal/howmuch/usecase/usecase/user_test.go
index fb41155..dee5bb9 100644
--- a/internal/howmuch/usecase/usecase/user_test.go
+++ b/internal/howmuch/usecase/usecase/user_test.go
@@ -27,13 +27,14 @@ import (
 	"testing"
 
 	"git.vinchent.xyz/vinchent/howmuch/internal/howmuch/model"
+	"git.vinchent.xyz/vinchent/howmuch/internal/howmuch/usecase/usecase/repomock"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestCreateUser(t *testing.T) {
 	t.Run("normal create", func(t *testing.T) {
 		ctx := context.Background()
-		userUsecase := NewUserUsecase(&TestUserRepository{}, &TestDBRepository{})
+		userUsecase := NewUserUsecase(&repomock.TestUserRepository{}, &repomock.TestDBRepository{})
 		input := &model.User{
 			Email:     "a@b.c",
 			FirstName: "James",
@@ -50,7 +51,7 @@ func TestCreateUser(t *testing.T) {
 
 	t.Run("duplicate create", func(t *testing.T) {
 		ctx := context.Background()
-		userUsecase := NewUserUsecase(&TestUserRepository{}, &TestDBRepository{})
+		userUsecase := NewUserUsecase(&repomock.TestUserRepository{}, &repomock.TestDBRepository{})
 		input := &model.User{
 			Email:     "duplicate@error.com",
 			FirstName: "James",
@@ -77,7 +78,7 @@ func TestUserExist(t *testing.T) {
 		{"query error", &model.User{
 			Email:    "query@error.com",
 			Password: "strongHashed",
-		}, UserTestDummyErr, false},
+		}, repomock.UserTestDummyErr, false},
 		{"user doesn not exist", &model.User{
 			Email:    "inexist@error.com",
 			Password: "strongHashed",
@@ -90,7 +91,7 @@ func TestUserExist(t *testing.T) {
 
 	for _, tst := range testCases {
 		ctx := context.Background()
-		userUsecase := NewUserUsecase(&TestUserRepository{}, &TestDBRepository{})
+		userUsecase := NewUserUsecase(&repomock.TestUserRepository{}, &repomock.TestDBRepository{})
 
 		got, err := userUsecase.Exist(ctx, tst.User)
 		assert.ErrorIs(t, err, tst.ExpErr)