diff --git a/tests/conftest.py b/tests/conftest.py
index 5fc54ae5a..469c43f1a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -67,6 +67,7 @@ def settings():
     # override settings for tests
     lnbits_settings.auth_https_only = False
     lnbits_settings.lnbits_admin_extensions = []
+    lnbits_settings.lnbits_backend_wallet_class = "FakeWallet"
     lnbits_settings.lnbits_data_folder = "./tests/data"
     lnbits_settings.lnbits_admin_ui = True
     lnbits_settings.lnbits_extensions_default_install = []
diff --git a/tests/helpers.py b/tests/helpers.py
index 7f5a9260a..3bf7d6521 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -182,6 +182,9 @@ def make_lnurl_pay_response(
         ),
     )
 
+
+settings.lnbits_backend_wallet_class = "FakeWallet"
+set_funding_source("FakeWallet")
 funding_source = get_funding_source()
 is_fake: bool = funding_source.__class__.__name__ == "FakeWallet"
 is_regtest: bool = not is_fake
diff --git a/tests/unit/test_services_users.py b/tests/unit/test_services_users.py
index be16d3ce7..2e3b102fa 100644
--- a/tests/unit/test_services_users.py
+++ b/tests/unit/test_services_users.py
@@ -102,29 +102,20 @@ async def test_create_user_account_no_check_creates_wallet_and_extensions(
     assert all(ext.active is True for ext in user_extensions)
 
 
-# TDOO: revisit for postgres
-# @pytest.mark.anyio
-# async def test_create_user_account_no_check_duplicate_extension_insert_behavior(
-#     settings: Settings,
-# ):
-#     account = _account()
-#     original_default_exts = list(settings.lnbits_user_default_extensions)
-#     try:
-#         settings.lnbits_user_default_extensions = ["dup-ext"]
-#         if DB_TYPE == POSTGRES:
-#             with pytest.raises(DBAPIError, match="current transaction is aborted"):
-#                 await create_user_account_no_ckeck(account, default_exts=["dup-ext"])
-#         else:
-#             user = await
-# create_user_account_no_ckeck(account, default_exts=["dup-ext"])
-#     finally:
-#         settings.lnbits_user_default_extensions = original_default_exts
+@pytest.mark.anyio
+async def test_create_user_account_no_check_ignores_duplicate_extension_insert(
+    settings: Settings,
+):
+    account = _account()
+    original_default_exts = list(settings.lnbits_user_default_extensions)
+    try:
+        settings.lnbits_user_default_extensions = ["dup-ext"]
+        user = await create_user_account_no_ckeck(account, default_exts=["dup-ext"])
+    finally:
+        settings.lnbits_user_default_extensions = original_default_exts
 
-#     if DB_TYPE == POSTGRES:
-#         assert await get_account(account.id) is not None
-#     else:
-#         user_extensions = await get_user_extensions(user.id)
-#         assert [ext.extension for ext in user_extensions] == ["dup-ext"]
+    user_extensions = await get_user_extensions(user.id)
+    assert [ext.extension for ext in user_extensions] == ["dup-ext"]
 
 
 @pytest.mark.anyio