We use the db instance globally with establisheddatabase.

seasoned_api/test/helpers/createUser.js

@@ -1,12 +1,11 @@
 const User = require('src/user/user');
 const UserSecurity = require('src/user/userSecurity');
-const SqliteDatabase = require('src/database/sqliteDatabase');
 
-function createUser(username, email, password) {
-  const database = new SqliteDatabase(':memory:');
-  const userSecurity = new UserSecurity(database);
-  const user = new User(username, email);
-  return userSecurity.createNewUser(user, password);
+function createUser(username, password) {
+  const userSecurity = new UserSecurity();
+  const user = new User(username)
+
+  return Promise.resolve(userSecurity.createNewUser(user, password))
 }
 
 module.exports = createUser;