diff --git a/backend/internal/database/db.go b/backend/internal/database/db.go
index ce329af..820c1f2 100644
--- a/backend/internal/database/db.go
+++ b/backend/internal/database/db.go
@@ -14,7 +14,6 @@ import (
 type Database interface {
 	// Insert a new user into the database, password should be hashed before calling
 	AddUser(username string, password string) error
-
 	RemoveUser(username string) error
 	PromoteToAdmin(username string) error
 	GetUserId(username string) (int, error)
@@ -22,10 +21,7 @@ type Database interface {
 	Migrate(dirname string) error
 	AddTimeReport(projectName string, userName string, start time.Time, end time.Time) error
 	AddUserToProject(username string, projectname string, role 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
+	ChangeUserRole(username string, projectname string, role string) error
 }
 
 // This struct is a wrapper type that holds the database connection
@@ -46,7 +42,7 @@ const addTimeReport = `WITH UserLookup AS (SELECT id FROM users WHERE username =
 						INSERT INTO time_reports (project_id, user_id, start, end) 
 						VALUES ((SELECT id FROM ProjectLookup), (SELECT id FROM UserLookup), ?, ?);`
 const addUserToProject = "INSERT INTO user_roles (user_id, project_id, p_role) VALUES (?, ?, ?)" // WIP
-const changeUserRole = "UPDATE project_member SET role = ? WHERE user_id = ? AND project_id = ?"
+const changeUserRole = "UPDATE user_roles SET p_role = ? WHERE user_id = ? AND project_id = ?"
 
 // DbConnect connects to the database
 func DbConnect(dbpath string) Database {
diff --git a/backend/internal/database/db_test.go b/backend/internal/database/db_test.go
index 7d431b9..0be4f34 100644
--- a/backend/internal/database/db_test.go
+++ b/backend/internal/database/db_test.go
@@ -152,6 +152,29 @@ func TestAddUserToProject(t *testing.T) {
 
 // }
 
-// func TestChangeUserRole(t *testing.T) {
+func TestChangeUserRole(t *testing.T) {
+	db, err := setupState()
+	if err != nil {
+		t.Error("setupState failed:", err)
+	}
 
-// }
+	err = db.AddUser("testuser", "password")
+	if err != nil {
+		t.Error("AddUser failed:", err)
+	}
+
+	err = db.AddProject("testproject", "description", "testuser")
+	if err != nil {
+		t.Error("AddProject failed:", err)
+	}
+
+	err = db.AddUserToProject("testuser", "testproject", "user")
+	if err != nil {
+		t.Error("AddUserToProject failed:", err)
+	}
+
+	err = db.ChangeUserRole("testuser", "testproject", "admin")
+	if err != nil {
+		t.Error("ChangeUserRole failed:", err)
+	}
+}