diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..f561429
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,10 @@
+repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    # Ruff version.
+    rev: v0.4.9
+    hooks:
+      # Run the linter.
+      - id: ruff
+        args: [ "check", "--select", "I", "--fix" ]
+      # Run the formatter.
+      - id: ruff-format
diff --git a/poetry.lock b/poetry.lock
index 3d05b94..fd5071d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -91,6 +91,17 @@ files = [
     {file = "certifi-2024.6.2.tar.gz", hash = "sha256:3cd43f1c6fa7dedc5899d69d3ad0398fd018ad1a17fba83ddaf78aa46c747516"},
 ]
 
+[[package]]
+name = "cfgv"
+version = "3.4.0"
+description = "Validate configuration and produce human readable error messages."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "cfgv-3.4.0-py2.py3-none-any.whl", hash = "sha256:b7265b1f29fd3316bfcd2b330d63d024f2bfd8bcb8b0272f8e19a504856c48f9"},
+    {file = "cfgv-3.4.0.tar.gz", hash = "sha256:e52591d4c5f5dead8e0f673fb16db7949d2cfb3f7da4582893288f0ded8fe560"},
+]
+
 [[package]]
 name = "chardet"
 version = "5.2.0"
@@ -347,6 +358,17 @@ files = [
     {file = "decorator-5.1.1.tar.gz", hash = "sha256:637996211036b6385ef91435e4fae22989472f9d571faba8927ba8253acbc330"},
 ]
 
+[[package]]
+name = "distlib"
+version = "0.3.8"
+description = "Distribution utilities"
+optional = false
+python-versions = "*"
+files = [
+    {file = "distlib-0.3.8-py2.py3-none-any.whl", hash = "sha256:034db59a0b96f8ca18035f36290806a9a6e6bd9d1ff91e45a7f172eb17e51784"},
+    {file = "distlib-0.3.8.tar.gz", hash = "sha256:1530ea13e350031b6312d8580ddb6b27a104275a31106523b8f123787f494f64"},
+]
+
 [[package]]
 name = "dunamai"
 version = "1.21.1"
@@ -389,6 +411,22 @@ files = [
 [package.dependencies]
 python-dateutil = ">=2.4"
 
+[[package]]
+name = "filelock"
+version = "3.15.1"
+description = "A platform independent file lock."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "filelock-3.15.1-py3-none-any.whl", hash = "sha256:71b3102950e91dfc1bb4209b64be4dc8854f40e5f534428d8684f953ac847fac"},
+    {file = "filelock-3.15.1.tar.gz", hash = "sha256:58a2549afdf9e02e10720eaa4d4470f56386d7a6f72edd7d0596337af8ed7ad8"},
+]
+
+[package.extras]
+docs = ["furo (>=2023.9.10)", "sphinx (>=7.2.6)", "sphinx-autodoc-typehints (>=1.25.2)"]
+testing = ["covdefaults (>=2.3)", "coverage (>=7.3.2)", "diff-cover (>=8.0.1)", "pytest (>=7.4.3)", "pytest-asyncio (>=0.21)", "pytest-cov (>=4.1)", "pytest-mock (>=3.12)", "pytest-timeout (>=2.2)"]
+typing = ["typing-extensions (>=4.8)"]
+
 [[package]]
 name = "funcy"
 version = "2.0"
@@ -400,6 +438,20 @@ files = [
     {file = "funcy-2.0.tar.gz", hash = "sha256:3963315d59d41c6f30c04bc910e10ab50a3ac4a225868bfa96feed133df075cb"},
 ]
 
+[[package]]
+name = "identify"
+version = "2.5.36"
+description = "File identification library for Python"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "identify-2.5.36-py2.py3-none-any.whl", hash = "sha256:37d93f380f4de590500d9dba7db359d0d3da95ffe7f9de1753faa159e71e7dfa"},
+    {file = "identify-2.5.36.tar.gz", hash = "sha256:e5e00f54165f9047fbebeb4a560f9acfb8af4c88232be60a488e9b68d122745d"},
+]
+
+[package.extras]
+license = ["ukkonen"]
+
 [[package]]
 name = "idna"
 version = "3.7"
@@ -680,6 +732,17 @@ files = [
     {file = "mdurl-0.1.2.tar.gz", hash = "sha256:bb413d29f5eea38f31dd4754dd7377d4465116fb207585f97bf925588687c1ba"},
 ]
 
+[[package]]
+name = "nodeenv"
+version = "1.9.1"
+description = "Node.js virtual environment builder"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
+files = [
+    {file = "nodeenv-1.9.1-py2.py3-none-any.whl", hash = "sha256:ba11c9782d29c27c70ffbdda2d7415098754709be8a7056d79a737cd901155c9"},
+    {file = "nodeenv-1.9.1.tar.gz", hash = "sha256:6ec12890a2dab7946721edbfbcd91f3319c6ccc9aec47be7c7e6b7011ee6645f"},
+]
+
 [[package]]
 name = "packaging"
 version = "24.0"
@@ -762,6 +825,22 @@ files = [
 [package.dependencies]
 ptyprocess = ">=0.5"
 
+[[package]]
+name = "platformdirs"
+version = "4.2.2"
+description = "A small Python package for determining appropriate platform-specific dirs, e.g. a `user data dir`."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "platformdirs-4.2.2-py3-none-any.whl", hash = "sha256:2d7a1657e36a80ea911db832a8a6ece5ee53d8de21edd5cc5879af6530b1bfee"},
+    {file = "platformdirs-4.2.2.tar.gz", hash = "sha256:38b7b51f512eed9e84a22788b4bce1de17c0adb134d6becb09836e37d8654cd3"},
+]
+
+[package.extras]
+docs = ["furo (>=2023.9.10)", "proselint (>=0.13)", "sphinx (>=7.2.6)", "sphinx-autodoc-typehints (>=1.25.2)"]
+test = ["appdirs (==1.4.4)", "covdefaults (>=2.3)", "pytest (>=7.4.3)", "pytest-cov (>=4.1)", "pytest-mock (>=3.12)"]
+type = ["mypy (>=1.8)"]
+
 [[package]]
 name = "pluggy"
 version = "1.5.0"
@@ -796,6 +875,24 @@ dev = ["paramiko", "psutil", "pytest (>=6.0)", "pytest-cov", "pytest-mock", "pyt
 docs = ["sphinx (>=4.0.0)", "sphinx-rtd-theme (>=1.0.0)"]
 ssh = ["paramiko"]
 
+[[package]]
+name = "pre-commit"
+version = "3.7.1"
+description = "A framework for managing and maintaining multi-language pre-commit hooks."
+optional = false
+python-versions = ">=3.9"
+files = [
+    {file = "pre_commit-3.7.1-py2.py3-none-any.whl", hash = "sha256:fae36fd1d7ad7d6a5a1c0b0d5adb2ed1a3bda5a21bf6c3e5372073d7a11cd4c5"},
+    {file = "pre_commit-3.7.1.tar.gz", hash = "sha256:8ca3ad567bc78a4972a3f1a477e94a79d4597e8140a6e0b651c5e33899c3654a"},
+]
+
+[package.dependencies]
+cfgv = ">=2.0.0"
+identify = ">=1.0.0"
+nodeenv = ">=0.11.1"
+pyyaml = ">=5.1"
+virtualenv = ">=20.10.0"
+
 [[package]]
 name = "prompt-toolkit"
 version = "3.0.45"
@@ -1373,6 +1470,26 @@ h2 = ["h2 (>=4,<5)"]
 socks = ["pysocks (>=1.5.6,!=1.5.7,<2.0)"]
 zstd = ["zstandard (>=0.18.0)"]
 
+[[package]]
+name = "virtualenv"
+version = "20.26.2"
+description = "Virtual Python Environment builder"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "virtualenv-20.26.2-py3-none-any.whl", hash = "sha256:a624db5e94f01ad993d476b9ee5346fdf7b9de43ccaee0e0197012dc838a0e9b"},
+    {file = "virtualenv-20.26.2.tar.gz", hash = "sha256:82bf0f4eebbb78d36ddaee0283d43fe5736b53880b8a8cdcd37390a07ac3741c"},
+]
+
+[package.dependencies]
+distlib = ">=0.3.7,<1"
+filelock = ">=3.12.2,<4"
+platformdirs = ">=3.9.1,<5"
+
+[package.extras]
+docs = ["furo (>=2023.7.26)", "proselint (>=0.13)", "sphinx (>=7.1.2,!=7.3)", "sphinx-argparse (>=0.4)", "sphinxcontrib-towncrier (>=0.2.1a0)", "towncrier (>=23.6)"]
+test = ["covdefaults (>=2.3)", "coverage (>=7.2.7)", "coverage-enable-subprocess (>=1)", "flaky (>=3.7)", "packaging (>=23.1)", "pytest (>=7.4)", "pytest-env (>=0.8.2)", "pytest-freezer (>=0.4.8)", "pytest-mock (>=3.11.1)", "pytest-randomly (>=3.12)", "pytest-timeout (>=2.1)", "setuptools (>=68)", "time-machine (>=2.10)"]
+
 [[package]]
 name = "wcwidth"
 version = "0.2.13"
@@ -1415,4 +1532,4 @@ watchdog = ["watchdog (>=2.3)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "1b0cab55ab7d11edf76451cb3f5d64c03978a3b442ace9f33a05ce76f27aba3f"
+content-hash = "f76ab09f4eabea611936b965e21ac30ccac2e1941ce06fb378b554425e0ac087"
diff --git a/pyproject.toml b/pyproject.toml
index 3f76e46..f4d0c53 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,6 +27,7 @@ pytest-cov = "^5.0.0"
 
 [tool.poetry.group.dev.dependencies]
 ruff = "^0.4.7"
+pre-commit = "^3.7.1"
 
 [build-system]
 requires = ["poetry-core"]
@@ -41,3 +42,7 @@ addopts = [
     "--cov-report=term-missing",
     "--cov-branch"
 ]
+
+[tool.ruff.lint.isort]
+known-first-party = ["lending"]
+known-third-party = ["protean"]
\ No newline at end of file
diff --git a/src/lending/__init__.py b/src/lending/__init__.py
index 5db538d..004d5ef 100644
--- a/src/lending/__init__.py
+++ b/src/lending/__init__.py
@@ -1,23 +1,21 @@
-from lending.patron import (
-    Patron,
-    PatronType,
-    Hold,
-    HoldType,
-    HoldStatus,
-    Checkout,
-    CheckoutStatus,
-    HoldPlaced
-)
-
 from lending.book import (
     Book,
     BookStatus,
     BookType,
 )
-
-from lending.holding_service import place_hold
-from lending.daily_sheet_service import DailySheetService
 from lending.checkout_service import checkout
+from lending.daily_sheet_service import DailySheetService
+from lending.holding_service import place_hold
+from lending.patron import (
+    Checkout,
+    CheckoutStatus,
+    Hold,
+    HoldPlaced,
+    HoldStatus,
+    HoldType,
+    Patron,
+    PatronType,
+)
 
 __all__ = [
     "Patron",
diff --git a/src/lending/book.py b/src/lending/book.py
index 0b6cadf..e805248 100644
--- a/src/lending/book.py
+++ b/src/lending/book.py
@@ -3,8 +3,8 @@
 from protean import handle
 from protean.fields import String
 
-from lending.domain import lending
 from lending import HoldPlaced
+from lending.domain import lending
 
 
 class BookStatus(Enum):
diff --git a/src/lending/checkout_service.py b/src/lending/checkout_service.py
index 71cc56a..f496ffa 100644
--- a/src/lending/checkout_service.py
+++ b/src/lending/checkout_service.py
@@ -1,11 +1,9 @@
-from datetime import datetime, timedelta
-
 from protean import invariant
 from protean.exceptions import ValidationError
 from protean.fields import Identifier
 
+from lending import Book, BookType, Checkout, HoldStatus, Patron, PatronType
 from lending.domain import lending
-from lending import Patron, Book, Checkout, HoldStatus, BookType, PatronType
 
 
 @lending.domain_service(part_of=[Patron, Book])
@@ -34,8 +32,6 @@ def __call__(self):
             Checkout(
                 book_id=self.book.id,
                 branch_id=self.branch_id,
-                checkout_date=datetime.now(),
-                due_date=datetime.now() + timedelta(days=60),
             )
         )
 
diff --git a/src/lending/daily_sheet_service.py b/src/lending/daily_sheet_service.py
index baba3cd..1f763b5 100644
--- a/src/lending/daily_sheet_service.py
+++ b/src/lending/daily_sheet_service.py
@@ -1,6 +1,6 @@
-from datetime import datetime, timezone
+from datetime import date
 
-from lending import Patron, Book, HoldStatus
+from lending import Book, HoldStatus, Patron
 from lending.domain import lending
 
 
@@ -18,12 +18,12 @@ def _expire_holds(self):
             for hold in patron.holds:
                 if (
                     hold.status == HoldStatus.ACTIVE.value
-                    and hold.expiry_date < datetime.now()
+                    and hold.expiry_date < date.today()
                 ):
                     patron.expire_hold(hold.id)
 
     def _overdue_checkouts(self):
         for patron in self.patrons:
             for checkout in patron.checkouts:
-                if checkout.due_date < datetime.now(timezone.utc):
+                if checkout.due_date < date.today():
                     checkout.overdue()
diff --git a/src/lending/domain.toml b/src/lending/domain.toml
index a860198..dfd09df 100644
--- a/src/lending/domain.toml
+++ b/src/lending/domain.toml
@@ -16,4 +16,7 @@ provider = "memory"
 provider = "inline"
 
 [caches.default]
-provider = "memory"
\ No newline at end of file
+provider = "memory"
+
+[custom]
+CHECKOUT_PERIOD = 60  # Days
\ No newline at end of file
diff --git a/src/lending/holding_service.py b/src/lending/holding_service.py
index bcad986..dcd370d 100644
--- a/src/lending/holding_service.py
+++ b/src/lending/holding_service.py
@@ -1,19 +1,19 @@
-from datetime import datetime, timedelta
+from datetime import date, datetime, timedelta
 
 from protean import invariant
-from protean.fields import Identifier
 from protean.exceptions import ValidationError
+from protean.fields import Identifier
 
 from lending import (
+    Book,
+    BookStatus,
+    BookType,
     Hold,
+    HoldPlaced,
     HoldStatus,
     HoldType,
-    HoldPlaced,
     Patron,
     PatronType,
-    Book,
-    BookType,
-    BookStatus,
 )
 from lending.domain import lending
 
@@ -72,8 +72,7 @@ def patron_cannot_not_have_more_than_two_overdue_checkouts_in_branch(self):
         overdue_checkouts_in_branch = [
             checkout
             for checkout in self.patron.checkouts
-            if checkout.due_date < datetime.now()
-            and checkout.branch_id == self.branch_id
+            if checkout.due_date < date.today() and checkout.branch_id == self.branch_id
         ]
         if len(overdue_checkouts_in_branch) > 2:
             raise ValidationError(
@@ -91,7 +90,7 @@ def __call__(self):
             hold_type=self.hold_type.value,
             status=HoldStatus.ACTIVE.value,
             request_date=datetime.now(),
-            expiry_date=datetime.now() + timedelta(days=7),
+            expiry_date=date.today() + timedelta(days=7),
         )
         self.patron.add_holds(hold)
 
@@ -104,6 +103,6 @@ def __call__(self):
                 branch_id=hold.branch_id,
                 hold_type=hold.hold_type,
                 request_date=hold.request_date,
-                expiry_date=hold.expiry_date
+                expiry_date=hold.expiry_date,
             )
         )
diff --git a/src/lending/patron.py b/src/lending/patron.py
index 716245a..53ab2ca 100644
--- a/src/lending/patron.py
+++ b/src/lending/patron.py
@@ -1,8 +1,8 @@
-from datetime import datetime, timezone, timedelta
+from datetime import date, datetime, timedelta, timezone
 from enum import Enum
 
 from protean.exceptions import ObjectNotFoundError, ValidationError
-from protean.fields import DateTime, HasMany, Identifier, String
+from protean.fields import Date, DateTime, HasMany, Identifier, String
 
 from lending.domain import lending
 
@@ -65,13 +65,13 @@ class Hold:
     hold_type = String(max_length=12, default=HoldType.CLOSED_ENDED.value)
     status = String(max_length=11, default=HoldStatus.ACTIVE.value)
     request_date = DateTime(required=True)
-    expiry_date = DateTime(required=True)
+    expiry_date = Date(required=True)
 
     def expire(self):
         self.status = HoldStatus.EXPIRED.value
 
     def cancel(self):
-        if self.status == HoldStatus.EXPIRED.value or self.expiry_date < datetime.now():
+        if self.status == HoldStatus.EXPIRED.value or self.expiry_date < date.today():
             raise ValidationError({"expired_hold": ["Cannot cancel expired holds"]})
 
         if self.status == HoldStatus.CHECKED_OUT.value:
@@ -95,7 +95,11 @@ class Checkout:
     branch_id = Identifier(required=True)
     checkout_date = DateTime(required=True, default=utc_now)
     status = String(max_length=11, default=CheckoutStatus.ACTIVE.value)
-    due_date = DateTime(required=True, default=lambda: utc_now() + timedelta(days=7))
+    due_date = Date(
+        required=True,
+        default=lambda: date.today()
+        + timedelta(days=lending.config["custom"]["CHECKOUT_PERIOD"]),
+    )
     return_date = DateTime()
 
     def return_(self):
diff --git a/tests/lending/bdd/checkouts/features/check_out_a_book.feature b/tests/lending/bdd/checkouts/features/check_out_a_book.feature
index 86fd0fd..9df6f3e 100644
--- a/tests/lending/bdd/checkouts/features/check_out_a_book.feature
+++ b/tests/lending/bdd/checkouts/features/check_out_a_book.feature
@@ -6,6 +6,7 @@ Feature: Check Out a Book
     And the patron has a hold on the book
     When the patron checks out the book
     Then the checkout is successfully completed
+    And the checkout has a validity of CHECKOUT_PERIOD
 
   Scenario: Patron checks out an available circulating book
     Given a circulating book is available
diff --git a/tests/lending/bdd/checkouts/step_defs/checkout_steps.py b/tests/lending/bdd/checkouts/step_defs/checkout_steps.py
index 3c32a03..1990405 100644
--- a/tests/lending/bdd/checkouts/step_defs/checkout_steps.py
+++ b/tests/lending/bdd/checkouts/step_defs/checkout_steps.py
@@ -1,21 +1,21 @@
-import pytest
-
-from datetime import datetime, timedelta, timezone
-
-from pytest_bdd import given, when, then
+from datetime import date, timedelta
 
+import pytest
 from protean.exceptions import ValidationError
-from protean.globals import g
-
-from lending import Book, Patron, Checkout
+from protean.globals import current_domain, g
+from pytest_bdd import given, then, when
+from pytest_bdd.parsers import cfparse
 
 from lending import (
-    place_hold,
-    HoldType,
-    checkout,
+    Book,
     BookType,
+    Checkout,
     CheckoutStatus,
     DailySheetService,
+    HoldType,
+    Patron,
+    checkout,
+    place_hold,
 )
 
 
@@ -89,7 +89,7 @@ def system_has_overdue_checkouts():
         ]
     )
     # Manually expire a checkout
-    patron1.checkouts[0].due_date = datetime.now(timezone.utc) - timedelta(days=1)
+    patron1.checkouts[0].due_date = date.today() - timedelta(days=1)
 
     patron2.add_checkouts(
         Checkout(
@@ -98,7 +98,7 @@ def system_has_overdue_checkouts():
         )
     )
     # Manually exipre a checkout
-    patron2.checkouts[0].due_date = datetime.now(timezone.utc) - timedelta(days=1)
+    patron2.checkouts[0].due_date = date.today() - timedelta(days=1)
 
     g.current_patrons = [patron1, patron2]
 
@@ -131,6 +131,14 @@ def confirm_checkout_book():
     assert g.current_user.checkouts[0].book_id == g.current_book.id
 
 
+@then(cfparse("the checkout has a validity of {validity_days_config}"))
+def confirm_checkout_expiry(validity_days_config):
+    checkout = g.current_user.checkouts[0]
+    assert checkout.due_date == date.today() + timedelta(
+        days=current_domain.config["custom"][validity_days_config]
+    )
+
+
 @then("the checkout is rejected")
 def confirm_checkout_rejected():
     assert hasattr(g, "current_exception")
diff --git a/tests/lending/bdd/holds/features/place_a_hold_on_a_book.feature b/tests/lending/bdd/holds/features/place_a_hold_on_a_book.feature
index 1b033ae..a12ab9d 100644
--- a/tests/lending/bdd/holds/features/place_a_hold_on_a_book.feature
+++ b/tests/lending/bdd/holds/features/place_a_hold_on_a_book.feature
@@ -37,7 +37,7 @@ Feature: Place a Hold on a Book
   Scenario: Patron with two overdue checkouts at the branch tries to place a hold
     Given a circulating book is available
     And a patron has more than two overdue checkouts at the branch
-    And a patron is logged in
+    And the patron is logged in
     When the patron tries to place a hold on a book
     Then the hold placement is rejected
     And the book is not marked as held
diff --git a/tests/lending/bdd/holds/step_defs/hold_steps.py b/tests/lending/bdd/holds/step_defs/hold_steps.py
index b92c05e..06a6a33 100644
--- a/tests/lending/bdd/holds/step_defs/hold_steps.py
+++ b/tests/lending/bdd/holds/step_defs/hold_steps.py
@@ -1,20 +1,18 @@
-import pytest
-
-from datetime import datetime, timedelta
-
-from pytest_bdd import given, when, then
+from datetime import date, timedelta
 
+import pytest
 from protean.exceptions import ValidationError
-from protean.globals import g, current_domain
+from protean.globals import current_domain, g
+from pytest_bdd import given, then, when
 
 from lending import (
     Book,
     BookStatus,
     BookType,
-    place_hold,
-    HoldType,
-    HoldStatus,
     DailySheetService,
+    HoldStatus,
+    HoldType,
+    place_hold,
 )
 
 
@@ -45,6 +43,7 @@ def restricted_book(book):
 
 @given("a regular patron is logged in")
 @given("a patron is logged in")
+@given("the patron is logged in")
 def regular_patron(regular_patron):
     g.current_user = regular_patron
 
@@ -72,7 +71,7 @@ def closed_ended_hold_placed():
 
 @given("the hold has reached its expiry date")
 def hold_expired():
-    g.current_user.holds[0].expiry_date = datetime.now() - timedelta(days=1)
+    g.current_user.holds[0].expiry_date = date.today() - timedelta(days=1)
 
 
 @given("patron has fewer than five holds")
@@ -101,7 +100,7 @@ def patron_with_expired_hold(patron, book):
     g.current_book = book
 
     place_hold(g.current_user, book, "1", HoldType.CLOSED_ENDED)()
-    g.current_user.holds[0].expiry_date = datetime.now() - timedelta(days=1)
+    g.current_user.holds[0].expiry_date = date.today() - timedelta(days=1)
 
 
 @given("a patron has a hold that has been checked out")
diff --git a/tests/lending/conftest.py b/tests/lending/conftest.py
index b44bf3f..22075bd 100644
--- a/tests/lending/conftest.py
+++ b/tests/lending/conftest.py
@@ -1,10 +1,11 @@
-import lending
 import os
-import pytest
-
 from datetime import timedelta
+
+import pytest
 from faker import Faker
 
+import lending
+
 Faker.seed(0)
 fake = Faker()
 
@@ -70,9 +71,9 @@ def researcher_patron(patron):
 
 @pytest.fixture
 def overdue_checkouts_patron(patron):
-    checkout_date1 = fake.date_time_between(start_date="-90d", end_date="-61d")
-    checkout_date2 = fake.date_time_between(start_date="-80d", end_date="-71d")
-    checkout_date3 = fake.date_time_between(start_date="-85d", end_date="-75d")
+    checkout_date1 = fake.date_between(start_date="-90d", end_date="-61d")
+    checkout_date2 = fake.date_between(start_date="-80d", end_date="-71d")
+    checkout_date3 = fake.date_between(start_date="-85d", end_date="-75d")
     patron.checkouts = [
         lending.Checkout(
             branch_id="1",
diff --git a/tests/lending/tdd/patron/test_hold_entity.py b/tests/lending/tdd/patron/test_hold_entity.py
index 4d279a8..df5bd8e 100644
--- a/tests/lending/tdd/patron/test_hold_entity.py
+++ b/tests/lending/tdd/patron/test_hold_entity.py
@@ -1,7 +1,6 @@
 from protean.reflection import declared_fields
 from protean.utils import DomainObjects
 
-
 from lending import Hold