diff --git a/src/profile/data/repositories/profiles-repository-impl.test.ts b/src/profile/data/repositories/profiles-repository-impl.test.ts
new file mode 100644
index 00000000..f6eab62d
--- /dev/null
+++ b/src/profile/data/repositories/profiles-repository-impl.test.ts
@@ -0,0 +1,33 @@
+import { DatabaseServiceImpl } from "@/src/common/data/services/database-service-impl";
+import { locator } from "@/src/common/di/locator";
+import { ObjectId } from "mongodb";
+import { beforeEach, describe, expect, it } from "vitest";
+import { profilesCollection } from "../collections/profiles-collection";
+
+describe("ProfilesRepositoryImpl", () => {
+  beforeEach(async () => {
+    locator.DatabaseService = () =>
+      new DatabaseServiceImpl(locator.EnvService(), "ProfilesRepositoryImpl");
+    const databaseService = locator.DatabaseService();
+    await databaseService.collection(profilesCollection).deleteMany();
+  });
+
+  it("create creates a new private profile", async () => {
+    const userObjectId = new ObjectId();
+    const userId = userObjectId.toString();
+    const repository = await locator.ProfilesRepository();
+    await repository.create(userId);
+    const databaseService = locator.DatabaseService();
+    const [profilesCount, profile] = await Promise.all([
+      databaseService.collection(profilesCollection).countDocuments(),
+      databaseService
+        .collection(profilesCollection)
+        .findOne({ userId: new ObjectId(userId) }),
+    ]);
+
+    expect(profilesCount).toBe(1);
+    expect(profile).not.toBeNull();
+    expect(profile?.userId).toEqual(userObjectId);
+    expect(profile?.isPublic).toBe(false);
+  });
+});
diff --git a/src/tags/data/repositories/tags-repository-impl.test.ts b/src/tags/data/repositories/tags-repository-impl.test.ts
new file mode 100644
index 00000000..074f8764
--- /dev/null
+++ b/src/tags/data/repositories/tags-repository-impl.test.ts
@@ -0,0 +1,105 @@
+import { DatabaseServiceImpl } from "@/src/common/data/services/database-service-impl";
+import { locator } from "@/src/common/di/locator";
+import { beforeEach, describe, expect, it } from "vitest";
+import { tagsCollection } from "../collections/tags-collection";
+
+describe("TagsRepositoryImpl", () => {
+  beforeEach(async () => {
+    locator.DatabaseService = () =>
+      new DatabaseServiceImpl(locator.EnvService(), "ProfilesRepositoryImpl");
+    const databaseService = locator.DatabaseService();
+    await databaseService.collection(tagsCollection).deleteMany();
+  });
+
+  it("create creates a list of tags", async () => {
+    const repository = await locator.TagsRepository();
+    await repository.create(["tag1", "tag2", "tag3"]);
+    const databaseService = locator.DatabaseService();
+    const tagsCount = await databaseService
+      .collection(tagsCollection)
+      .countDocuments();
+    expect(tagsCount).toBe(3);
+    const tag1 = await databaseService.collection(tagsCollection).findOne({
+      name: "tag1",
+    });
+    expect(tag1).not.toBeNull();
+    expect(tag1?.name).toBe("tag1");
+
+    const tag2 = await databaseService.collection(tagsCollection).findOne({
+      name: "tag2",
+    });
+    expect(tag2).not.toBeNull();
+    expect(tag2?.name).toBe("tag2");
+  });
+
+  it("create ignores repeated tags", async () => {
+    const repository = await locator.TagsRepository();
+    await repository.create(["tag1", "tag1", "tag7"]);
+    await repository.create(["tag1"]);
+    const databaseService = locator.DatabaseService();
+    const tagsCount = await databaseService
+      .collection(tagsCollection)
+      .countDocuments();
+    expect(tagsCount).toBe(2);
+  });
+
+  it("create does nothing when the argument is an empty array", async () => {
+    const repository = await locator.TagsRepository();
+    await repository.create([]);
+    const databaseService = locator.DatabaseService();
+    const tagsCount = await databaseService
+      .collection(tagsCollection)
+      .countDocuments();
+    expect(tagsCount).toBe(0);
+  });
+
+  it("getSuggestions returns a list of tags that start with the query", async () => {
+    const repository = await locator.TagsRepository();
+    await repository.create([
+      "apple",
+      "banana",
+      "application",
+      "orange",
+      "pear",
+    ]);
+    const suggestions = await repository.getSuggestions("app");
+    expect(suggestions.sort()).toEqual(["apple", "application"]);
+
+    const suggestions2 = await repository.getSuggestions("ora");
+    expect(suggestions2).toEqual(["orange"]);
+
+    const suggestions3 = await repository.getSuggestions("xxw");
+    expect(suggestions3).toEqual([]);
+  });
+
+  it("getSuggestions returns a maximum of 5 suggestions", async () => {
+    const repository = await locator.TagsRepository();
+    await repository.create([
+      "test1",
+      "test2",
+      "test3",
+      "test4",
+      "test5",
+      "test6",
+      "test7",
+    ]);
+    const suggestions = await repository.getSuggestions("test");
+    expect(suggestions).toHaveLength(5);
+  });
+
+  it("getSuggestions returns all suggestions (but not more than 5) if the query is undefined or an empty string", async () => {
+    const repository = await locator.TagsRepository();
+    await repository.create(["test1", "test2", "test3", "test4"]);
+    let suggestions = await repository.getSuggestions();
+    expect(suggestions).toHaveLength(4);
+    suggestions = await repository.getSuggestions("");
+    expect(suggestions).toHaveLength(4);
+
+    await repository.create(["test5", "test6", "test7"]);
+
+    suggestions = await repository.getSuggestions();
+    expect(suggestions).toHaveLength(5);
+    suggestions = await repository.getSuggestions("");
+    expect(suggestions).toHaveLength(5);
+  });
+});
diff --git a/src/tags/data/repositories/tags-repository-impl.ts b/src/tags/data/repositories/tags-repository-impl.ts
index bf329070..ad1072db 100644
--- a/src/tags/data/repositories/tags-repository-impl.ts
+++ b/src/tags/data/repositories/tags-repository-impl.ts
@@ -28,6 +28,7 @@ export class TagsRepositoryImpl implements TagsRepository {
       throw e;
     }
   }
+
   async getSuggestions(query?: string): Promise<string[]> {
     const cursor = this.tags.find(
       query ? { name: { $regex: `^${query}`, $options: "i" } } : {},