diff --git a/backend/internal/database/db.go b/backend/internal/database/db.go
index 9e63395..bb69ef0 100644
--- a/backend/internal/database/db.go
+++ b/backend/internal/database/db.go
@@ -24,9 +24,6 @@ type Database interface {
 	Migrate(dirname string) error
 	// AddTimeReport(projectname string, start time.Time, end time.Time) error
 	// AddUserToProject(username string, projectname string) error
-	// ChangeUserRole(username string, projectname string, role string) error
-	// AddTimeReport(projectname string, start time.Time, end time.Time) error
-	// AddUserToProject(username string, projectname string) error
 	ChangeUserRole(username string, projectname string, role string) error
 	GetProjectId(projectname string) (int, error)
 }
diff --git a/backend/internal/database/db_test.go b/backend/internal/database/db_test.go
index 08eee32..5937c9e 100644
--- a/backend/internal/database/db_test.go
+++ b/backend/internal/database/db_test.go
@@ -125,7 +125,3 @@ func TestDbChangeUserRole(t *testing.T) {
 // func TestAddUserToProject(t *testing.T) {
 
 // }
-
-// func TestChangeUserRole(t *testing.T) {
-
-// }