diff --git a/test/api/v3/integration/challenges/GET-challenges_challengeId_members.test.js b/test/api/v3/integration/challenges/GET-challenges_challengeId_members.test.js
new file mode 100644
index 0000000000..318181b66e
--- /dev/null
+++ b/test/api/v3/integration/challenges/GET-challenges_challengeId_members.test.js
@@ -0,0 +1,125 @@
+import {
+  generateUser,
+  generateGroup,
+  translate as t,
+} from '../../../../helpers/api-v3-integration.helper';
+import { v4 as generateUUID } from 'uuid';
+
+describe('GET /challenges/:challengeId/members', () => {
+  let user;
+
+  beforeEach(async () => {
+    user = await generateUser();
+  });
+
+  it('validates optional req.query.lastId to be an UUID', async () => {
+    await expect(user.get(`/challenges/${generateUUID()}/members?lastId=invalidUUID`)).to.eventually.be.rejected.and.eql({
+      code: 400,
+      error: 'BadRequest',
+      message: t('invalidReqParams'),
+    });
+  });
+
+  it('fails if challenge doesn\'t exists', async () => {
+    await expect(user.get(`/challenges/${generateUUID()}/members`)).to.eventually.be.rejected.and.eql({
+      code: 404,
+      error: 'NotFound',
+      message: t('challengeNotFound'),
+    });
+  });
+
+  it('fails if user doesn\'t have access to the challenge', async () => {
+    let group = await generateGroup(user, {type: 'party', name: generateUUID()});
+    let challenge = await user.post('/challenges', {
+      name: 'test chal',
+      shortName: 'test-chal',
+      groupId: group._id,
+    });
+    let anotherUser = await generateUser();
+    await expect(anotherUser.get(`/challenges/${challenge._id}/members`)).to.eventually.be.rejected.and.eql({
+      code: 404,
+      error: 'NotFound',
+      message: t('challengeNotFound'),
+    });
+  });
+
+  it('works with challenges belonging to public guild', async () => {
+    let leader = await generateUser({balance: 4});
+    let group = await generateGroup(leader, {type: 'guild', privacy: 'public', name: generateUUID()});
+    let challenge = await leader.post('/challenges', {
+      name: 'test chal',
+      shortName: 'test-chal',
+      groupId: group._id,
+    });
+    let res = await user.get(`/challenges/${challenge._id}/members`);
+    expect(res[0]).to.eql({
+      _id: leader._id,
+      profile: {name: leader.profile.name},
+    });
+    expect(res[0]).to.have.all.keys(['_id', 'profile']);
+    expect(res[0].profile).to.have.all.keys(['name']);
+  });
+
+  it('populates only some fields', async () => {
+    let anotherUser = await generateUser({balance: 3});
+    let group = await generateGroup(anotherUser, {type: 'guild', privacy: 'public', name: generateUUID()});
+    let challenge = await anotherUser.post('/challenges', {
+      name: 'test chal',
+      shortName: 'test-chal',
+      groupId: group._id,
+    });
+    let res = await user.get(`/challenges/${challenge._id}/members`);
+    expect(res[0]).to.eql({
+      _id: anotherUser._id,
+      profile: {name: anotherUser.profile.name},
+    });
+    expect(res[0]).to.have.all.keys(['_id', 'profile']);
+    expect(res[0].profile).to.have.all.keys(['name']);
+  });
+
+  it('returns only first 30 members', async () => {
+    let group = await generateGroup(user, {type: 'party', name: generateUUID()});
+    let challenge = await user.post('/challenges', {
+      name: 'test chal',
+      shortName: 'test-chal',
+      groupId: group._id,
+    });
+
+    let usersToGenerate = [];
+    for (let i = 0; i < 31; i++) {
+      usersToGenerate.push(generateUser({challenges: [challenge._id]}));
+    }
+    await Promise.all(usersToGenerate);
+
+    let res = await user.get(`/challenges/${challenge._id}/members`);
+    expect(res.length).to.equal(30);
+    res.forEach(member => {
+      expect(member).to.have.all.keys(['_id', 'profile']);
+      expect(member.profile).to.have.all.keys(['name']);
+    });
+  });
+
+  it('supports using req.query.lastId to get more members', async () => {
+    let group = await generateGroup(user, {type: 'party', name: generateUUID()});
+    let challenge = await user.post('/challenges', {
+      name: 'test chal',
+      shortName: 'test-chal',
+      groupId: group._id,
+    });
+
+    let usersToGenerate = [];
+    for (let i = 0; i < 57; i++) {
+      usersToGenerate.push(generateUser({challenges: [challenge._id]}));
+    }
+    let generatedUsers = await Promise.all(usersToGenerate); // Group has 59 members (1 is the leader)
+    let expectedIds = [user._id].concat(generatedUsers.map(generatedUser => generatedUser._id));
+
+    let res = await user.get(`/challenges/${challenge._id}/members`);
+    expect(res.length).to.equal(30);
+    let res2 = await user.get(`/challenges/${challenge._id}/members?lastId=${res[res.length - 1]._id}`);
+    expect(res2.length).to.equal(28);
+
+    let resIds = res.concat(res2).map(member => member._id);
+    expect(resIds).to.eql(expectedIds.sort());
+  });
+});