diff --git a/backend/tests/conftest.py b/backend/tests/conftest.py
index 517cc9c544..a5f89f772b 100644
--- a/backend/tests/conftest.py
+++ b/backend/tests/conftest.py
@@ -182,7 +182,7 @@ def mock_gitcoin_passport_fetch_score(*args, **kwargs):
 
 
 def mock_gitcoin_passport_fetch_stamps(*args, **kwargs):
-    "Returns structure resembling GP stamps, but only with relevant fields"
+    """Returns structure resembling GP stamps, but only with relevant fields"""
     if args[0] == "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266":
         return {
             "items": [
@@ -1127,6 +1127,15 @@ def patch_gitcoin_passport_fetch_stamps(monkeypatch):
     )
 
 
+@pytest.fixture(scope="function")
+def patch_guest_list_for_scoring(monkeypatch, alice):
+    MOCK_GUEST_LIST = [alice.address.lower()]
+    monkeypatch.setattr(
+        "app.modules.user.antisybil.core.GUEST_LIST",
+        MOCK_GUEST_LIST,
+    )
+
+
 @pytest.fixture(scope="function")
 def patch_etherscan_transactions_api(monkeypatch):
     monkeypatch.setattr(
diff --git a/backend/tests/modules/user/antisybil/test_antisybil.py b/backend/tests/modules/user/antisybil/test_antisybil.py
index 0d624a0ee9..63fa84998c 100644
--- a/backend/tests/modules/user/antisybil/test_antisybil.py
+++ b/backend/tests/modules/user/antisybil/test_antisybil.py
@@ -64,44 +64,44 @@ def test_gtc_staking_stamp_nullification(
     assert result.score == 0.5
 
 
-# TODO - OCT-2095: Fix this test as not to rely on the GP API but mock the response
-# def test_guest_stamp_score_bump_for_both_gp_and_octant_side_application(
-#     patch_gitcoin_passport_issue_address_for_scoring,
-#     patch_gitcoin_passport_fetch_score,
-#     patch_gitcoin_passport_fetch_stamps,
-#     mock_users_db,
-# ):
-#     context = get_context(4)
-#
-#     service = GitcoinPassportAntisybil(timeout_list=TIMEOUT_LIST)
-#     alice, _, _ = mock_users_db
-#
-#     score, expires_at, stamps = service.fetch_antisybil_status(context, alice.address)
-#     service.update_antisybil_status(context, alice.address, score, expires_at, stamps)
-#     result = service.get_antisybil_status(context, alice.address)
-#     score = result.score
-#     assert score == 2.572  # guest list score bonus not applied
-#
-#     guest_address = "0xe6ed9c681967a4ea7cef4486942b800139dfb000"
-#     database.user.add_user(guest_address)
-#     score, expires_at, stamps = service.fetch_antisybil_status(context, guest_address)
-#     print("YYY", score, expires_at, stamps)
-#     service.update_antisybil_status(context, guest_address, score, expires_at, stamps)
-#     result = service.get_antisybil_status(context, guest_address)
-#     score = result.score
-#     assert (not stamps) and (
-#         score == 21.0
-#     )  # is on guest list, no stamps, applying 21 score bonus manually
-#
-#     stamp_address = "0xBc6d82D8d6632938394905Bb0217Ad9c673015d1"
-#     database.user.add_user(stamp_address)
-#     score, expires_at, stamps = service.fetch_antisybil_status(context, stamp_address)
-#     service.update_antisybil_status(context, stamp_address, score, expires_at, stamps)
-#     result = service.get_antisybil_status(context, stamp_address)
-#     score = result.score
-#     assert (stamps) and (
-#         score == 22.0
-#     )  # is on guest list, HAS GUEST LIST STAMP, score is from fetch
+def test_guest_stamp_score_bump_for_both_gp_and_octant_side_application(
+    patch_gitcoin_passport_issue_address_for_scoring,
+    patch_gitcoin_passport_fetch_score,
+    patch_gitcoin_passport_fetch_stamps,
+    patch_guest_list_for_scoring,
+    mock_users_db,
+):
+    context = get_context(4)
+
+    service = GitcoinPassportAntisybil(timeout_list=TIMEOUT_LIST)
+    alice, bob, _ = mock_users_db
+
+    score, expires_at, stamps = service.fetch_antisybil_status(context, bob.address)
+
+    service.update_antisybil_status(context, bob.address, score, expires_at, stamps)
+    result = service.get_antisybil_status(context, bob.address)
+    score = result.score
+    assert score == 0.0  # nullified score, address is not on the GUEST_LIST
+
+    guest_address = alice.address
+    score, expires_at, stamps = service.fetch_antisybil_status(context, guest_address)
+    service.update_antisybil_status(context, guest_address, score, expires_at, stamps)
+    result = service.get_antisybil_status(context, guest_address)
+    score = result.score
+
+    assert len(stamps) > 0  # has stamps from the mock
+    assert (
+        score == 2.572 + 21.0
+    )  # is on guest list, applying additional 21 score bonus manually
+
+    stamp_address = "0xBc6d82D8d6632938394905Bb0217Ad9c673015d1"
+    database.user.add_user(stamp_address)
+    score, expires_at, stamps = service.fetch_antisybil_status(context, stamp_address)
+    service.update_antisybil_status(context, stamp_address, score, expires_at, stamps)
+    result = service.get_antisybil_status(context, stamp_address)
+    score = result.score
+    assert len(stamps) > 0
+    assert score == 22.0  # is on guest list, HAS GUEST LIST STAMP, score is from fetch
 
 
 def test_antisybil_cant_be_update_when_address_is_delegated(alice, bob):