diff --git a/src/utils/exams.be.ts b/src/utils/exams.be.ts
index 18621bc6..8b7b83df 100644
--- a/src/utils/exams.be.ts
+++ b/src/utils/exams.be.ts
@@ -5,7 +5,7 @@ import {DeveloperUser, Stat, StudentUser, User} from "@/interfaces/user";
 import {Module} from "@/interfaces";
 import {getCorporateUser} from "@/resources/user";
 import {getUserCorporate} from "./groups.be";
-import { Db, ObjectId } from "mongodb";
+import {Db, ObjectId} from "mongodb";
 
 export const getExams = async (
 	db: Db,
@@ -18,18 +18,18 @@ export const getExams = async (
 	variant?: Variant,
 	instructorGender?: InstructorGender,
 ): Promise<Exam[]> => {
+	const allExams = await db
+		.collection(module)
+		.find<Exam>({
+			isDiagnostic: false,
+		})
+		.toArray();
 
-	const allExams = await db.collection(module).find<Exam>({
-		isDiagnostic: false
-	  }).toArray();
-
-	const shuffledPublicExams = (
-		shuffle(
-			allExams.map((doc) => ({
-				...doc,
-				module,
-			})) as Exam[],
-		)
+	const shuffledPublicExams = shuffle(
+		allExams.map((doc) => ({
+			...doc,
+			module,
+		})) as Exam[],
 	).filter((x) => !x.private);
 
 	let exams: Exam[] = await filterByOwners(shuffledPublicExams, userId);
@@ -39,9 +39,12 @@ export const getExams = async (
 	exams = await filterByPreference(db, exams, module, userId);
 
 	if (avoidRepeated === "true") {
-		const stats = await db.collection("stats").find<Stat>({
-			user: userId
-		}).toArray();
+		const stats = await db
+			.collection("stats")
+			.find<Stat>({
+				user: userId,
+			})
+			.toArray();
 
 		const filteredExams = exams.filter((x) => !stats.map((s) => s.exam).includes(x.id));
 
@@ -78,7 +81,7 @@ const filterByOwners = async (exams: Exam[], userID?: string) => {
 
 const filterByDifficulty = async (db: Db, exams: Exam[], module: Module, userID?: string) => {
 	if (!userID) return exams;
-	const user = await db.collection("users").findOne<User>({ _id: new ObjectId(userID) });
+	const user = await db.collection("users").findOne<User>({id: userID});
 	if (!user) return exams;
 
 	const difficulty = user.levels[module] <= 3 ? "easy" : user.levels[module] <= 6 ? "medium" : "hard";
@@ -92,7 +95,7 @@ const filterByPreference = async (db: Db, exams: Exam[], module: Module, userID?
 
 	if (!userID) return exams;
 
-	const user = await db.collection("users").findOne<StudentUser | DeveloperUser>({ _id: new ObjectId(userID) });
+	const user = await db.collection("users").findOne<StudentUser | DeveloperUser>({id: userID});
 	if (!user) return exams;
 
 	if (!["developer", "student"].includes(user.type)) return exams;