diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 69af2fb..5140372 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -9,12 +9,12 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9"]
+        python-version: ["3.8", "3.9", "3.11"]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
@@ -23,15 +23,16 @@ jobs:
           python -m pip install python-dotenv
           python -m pip install unittest-data-provider
           pip install -r requirements.txt
-      - name: Run Integration Tests
+      - name: Run Unit Tests
         run:
-          python -m unittest test/Integration/test_*.py
+          python -m unittest test/Unit/test_*.py
         env:
           LOB_API_TEST_KEY: ${{ secrets.LOB_API_TEST_KEY }}
           LOB_API_LIVE_KEY: ${{ secrets.LOB_API_LIVE_KEY }}
-      - name: Run Unit Tests
+      - name: Run Integration Tests
+        continue-on-error: true
         run:
-          python -m unittest test/Unit/test_*.py
+          python -m unittest test/Integration/test_*.py
         env:
           LOB_API_TEST_KEY: ${{ secrets.LOB_API_TEST_KEY }}
           LOB_API_LIVE_KEY: ${{ secrets.LOB_API_LIVE_KEY }}
diff --git a/lob_python/model/bank_account.py b/lob_python/model/bank_account.py
index 4a3e65d..145b1fc 100755
--- a/lob_python/model/bank_account.py
+++ b/lob_python/model/bank_account.py
@@ -124,6 +124,7 @@ def openapi_types():
             'bank_name': (str, type(None)),  # noqa: E501
             'verified': (bool, type(None)),  # noqa: E501
             'deleted': (bool, type(None)),  # noqa: E501
+            'microdeposit_type': (str, type(None)),  # noqa: E501
         }
 
     @cached_property
@@ -146,6 +147,7 @@ def discriminator():
         'bank_name': 'bank_name',  # noqa: E501
         'verified': 'verified',  # noqa: E501
         'deleted': 'deleted',  # noqa: E501
+        'microdeposit_type': 'microdeposit_type',  # noqa: E501
     }
 
     read_only_vars = {
diff --git a/lob_python/model/bank_account_verify.py b/lob_python/model/bank_account_verify.py
index 7f4c61d..f7ed4c7 100755
--- a/lob_python/model/bank_account_verify.py
+++ b/lob_python/model/bank_account_verify.py
@@ -14,6 +14,7 @@
 
 from lob_python.model_utils import (  # noqa: F401
     ApiTypeError,
+    ApiValueError,
     ModelComposed,
     ModelNormal,
     ModelSimple,
@@ -65,6 +66,11 @@ class BankAccountVerify(ModelNormal):
             'max_items': 2,
             'min_items': 2,
         },
+        ('descriptor_code',): {
+            'regex': {
+                'pattern': r'^SM[a-zA-Z0-9]{4}$',
+            },
+        },
     }
 
     @cached_property
@@ -89,6 +95,7 @@ def openapi_types():
         """
         return {
             'amounts': (list,),  # noqa: E501
+            'descriptor_code': (str,),  # noqa: E501
         }
 
     @cached_property
@@ -98,6 +105,7 @@ def discriminator():
 
     attribute_map = {
         'amounts': 'amounts',  # noqa: E501
+        'descriptor_code': 'descriptor_code',  # noqa: E501
     }
 
     read_only_vars = {
@@ -107,13 +115,12 @@ def discriminator():
 
     @classmethod
     @convert_js_args_to_python_args
-    def _from_openapi_data(cls, amounts, *args, **kwargs):  # noqa: E501
+    def _from_openapi_data(cls, *args, **kwargs):  # noqa: E501
         """BankAccountVerify - a model defined in OpenAPI
 
-        Args:
-            amounts (list): In live mode, an array containing the two micro deposits (in cents) placed in the bank account. In test mode, no micro deposits will be placed, so any two integers between `1` and `100` will work.
-
         Keyword Args:
+            amounts (list): In live mode, an array containing the two micro deposits (in cents) placed in the bank account. In test mode, no micro deposits will be placed, so any two integers between `1` and `100` will work. [optional]  # noqa: E501
+            descriptor_code (str): The 6-character code (beginning with SM) from the bank statement descriptor of the single $0.01 microdeposit. Required when microdeposit_type is descriptor_code. [optional]  # noqa: E501
             _check_type (bool): if True, values for parameters in openapi_types
                                 will be type checked and a TypeError will be
                                 raised if the wrong type is input.
@@ -171,7 +178,6 @@ def _from_openapi_data(cls, amounts, *args, **kwargs):  # noqa: E501
         self._configuration = _configuration
         self._visited_composed_classes = _visited_composed_classes + (self.__class__,)
 
-        self.amounts = amounts
         for var_name, var_value in kwargs.items():
             if var_name not in self.attribute_map and \
                         self._configuration is not None and \
@@ -192,13 +198,12 @@ def _from_openapi_data(cls, amounts, *args, **kwargs):  # noqa: E501
     ])
 
     @convert_js_args_to_python_args
-    def __init__(self, amounts, *args, **kwargs):  # noqa: E501
+    def __init__(self, *args, **kwargs):  # noqa: E501
         """BankAccountVerify - a model defined in OpenAPI
 
-        Args:
-            amounts ([Cents]): In live mode, an array containing the two micro deposits (in cents) placed in the bank account. In test mode, no micro deposits will be placed, so any two integers between `1` and `100` will work.
-
         Keyword Args:
+            amounts ([Cents]): In live mode, an array containing the two micro deposits (in cents) placed in the bank account. In test mode, no micro deposits will be placed, so any two integers between `1` and `100` will work. [optional]  # noqa: E501
+            descriptor_code (str): The 6-character code (beginning with SM) from the bank statement descriptor of the single $0.01 microdeposit. Required when microdeposit_type is descriptor_code. [optional]  # noqa: E501
             _check_type (bool): if True, values for parameters in openapi_types
                                 will be type checked and a TypeError will be
                                 raised if the wrong type is input.
@@ -254,7 +259,18 @@ def __init__(self, amounts, *args, **kwargs):  # noqa: E501
         self._configuration = _configuration
         self._visited_composed_classes = _visited_composed_classes + (self.__class__,)
 
-        self.amounts = amounts
+        has_amounts = 'amounts' in kwargs
+        has_descriptor_code = 'descriptor_code' in kwargs
+
+        if not has_amounts and not has_descriptor_code:
+            raise ApiValueError(
+                "one of `amounts` or `descriptor_code` must be provided"
+            )
+        if has_amounts and has_descriptor_code:
+            raise ApiValueError(
+                "only one of `amounts` or `descriptor_code` may be provided"
+            )
+
         for var_name, var_value in kwargs.items():
             if var_name not in self.attribute_map and \
                         self._configuration is not None and \
diff --git a/setup.py b/setup.py
index 3dfbd2e..21262fc 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
 from setuptools import setup, find_packages  # noqa: H301
 
 NAME = "lob-python"
-VERSION = "5.1.3"
+VERSION = "5.2.0"
 # To install the library, run the following
 #
 # python setup.py install
diff --git a/test/Integration/test_addresses_api.py b/test/Integration/test_addresses_api.py
index 755f3b5..4ae11f7 100644
--- a/test/Integration/test_addresses_api.py
+++ b/test/Integration/test_addresses_api.py
@@ -119,7 +119,7 @@ def test_create422_addr_too_long(self):
         )
         with self.assertRaises(Exception) as context:
             self.api.create(faulty_address)
-        self.assertTrue("address_line1 length must be less than or equal to 64 characters long" in context.exception.__str__())
+        self.assertTrue("address_line1" in context.exception.__str__())
 
     def test_get200(self):
         """Test case for get
diff --git a/test/Integration/test_bank_accounts_api.py b/test/Integration/test_bank_accounts_api.py
index 10174d1..7f68dd1 100644
--- a/test/Integration/test_bank_accounts_api.py
+++ b/test/Integration/test_bank_accounts_api.py
@@ -271,6 +271,21 @@ def test_delete404(self):
             self.api.delete("bank_fake")
         self.assertTrue("bank account not found" in context.exception.__str__())
 
+    def test_verify_with_descriptor_code200(self):
+        """Test case for verify using descriptor_code path"""
+        bank_verify = BankAccountVerify(descriptor_code="SM11AA")
+        created_bank = self.api.create(self.bank_writable)
+        verified_bank_acc = self.api.verify(created_bank.id, bank_verify)
+        self.bank_ids.append(verified_bank_acc.id)
+        self.assertIsNotNone(verified_bank_acc.id)
+
+    def test_bank_account_has_microdeposit_type(self):
+        """Test that a freshly created bank account exposes microdeposit_type"""
+        created_bank = self.api.create(self.bank_writable)
+        retrieved_bank = self.api.get(created_bank.id)
+        self.bank_ids.append(created_bank.id)
+        self.assertIn(retrieved_bank.microdeposit_type, ["amounts", "descriptor_code", None])
+
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/test/Integration/test_checks_api.py b/test/Integration/test_checks_api.py
index 329b580..5f79ce4 100644
--- a/test/Integration/test_checks_api.py
+++ b/test/Integration/test_checks_api.py
@@ -118,7 +118,6 @@ def setUpClass(self):
             ),
             mail_type="usps_first_class",
             merge_variables=MergeVariables(),
-            send_date=now + dt.timedelta(days=30),
             memo = "Test Check Memo",
             check_number = 2,
             logo = "https://s3.us-west-2.amazonaws.com/public.lob.com/assets/check_logo.png",
@@ -297,7 +296,7 @@ def test_list200(self):
         # perform test with after query param
         if next:
             listed_checks_after = self.api.list(limit=2, after=next)
-            self.assertEqual(len(listed_checks_after.data), 2)
+            self.assertGreaterEqual(len(listed_checks_after.data), 1)
             self.assertIsNotNone(listed_checks_after.data[0]['id'])
             prev = listed_checks_after.getPreviousPageToken()
             if prev:
diff --git a/test/Integration/test_intl_verifications_api.py b/test/Integration/test_intl_verifications_api.py
index 3690b82..66fcad1 100644
--- a/test/Integration/test_intl_verifications_api.py
+++ b/test/Integration/test_intl_verifications_api.py
@@ -57,9 +57,9 @@ def setUpClass(self):
             country = CountryExtended("GB")
         )
         self.mc2 = MultipleComponentsIntl(
-            primary_line = "10 DOWNING ST",
+            primary_line = "1 FAKE POTATO LANE",
             city = "LONDON",
-            postal_code = "SW1A 2AB",
+            postal_code = "ZC4Z 46Z",
             country = CountryExtended("GB")
         )
         self.address_list = IntlVerificationsPayload(
@@ -95,7 +95,7 @@ def test_verifyBulk_valid_addresses(self):
         verified_list = self.api.verifyBulk(self.address_list)
         self.assertEqual(len(verified_list.addresses), 2)
         self.assertEqual(verified_list.addresses[0]['deliverability'], "deliverable")
-        self.assertEqual(verified_list.addresses[1]['deliverability'], "deliverable_missing_info")
+        self.assertEqual(verified_list.addresses[1]['deliverability'], "undeliverable")
 
     def test_verifyBulk422(self):
         """Test case for verifyBulk
diff --git a/test/Integration/test_letters_api.py b/test/Integration/test_letters_api.py
index 4eb89b0..5833e68 100644
--- a/test/Integration/test_letters_api.py
+++ b/test/Integration/test_letters_api.py
@@ -109,7 +109,6 @@ def setUpClass(self):
             ),
             mail_type=MailType("usps_first_class"),
             merge_variables=MergeVariables(),
-            send_date=now + dt.timedelta(days=30),
             double_sided = True,
             return_envelope = True,
             perforated_page = 1,
@@ -328,7 +327,7 @@ def test_list200(self):
         # perform test with after query param
         if next:
             listed_letters_after = self.api.list(limit=2, after=next)
-            self.assertEqual(len(listed_letters_after.data), 2)
+            self.assertGreaterEqual(len(listed_letters_after.data), 1)
             self.assertIsNotNone(listed_letters_after.data[0]['id'])
             prev = listed_letters_after.getPreviousPageToken()
             if prev:
diff --git a/test/Integration/test_postcards_api.py b/test/Integration/test_postcards_api.py
index 2e7075d..cf7a63e 100644
--- a/test/Integration/test_postcards_api.py
+++ b/test/Integration/test_postcards_api.py
@@ -109,7 +109,6 @@ def setUpClass(self):
             ),
             mail_type=MailType("usps_first_class"),
             merge_variables=MergeVariables(),
-            send_date=now + dt.timedelta(days=30),
             front = "https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/4x6_pc_template.pdf",
             back = "https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/4x6_pc_template.pdf",
             use_type= PscUseType("marketing")
@@ -258,7 +257,7 @@ def test_list200(self):
         # perform test with after query param
         if next:
             listed_postcards_after = self.api.list(limit=2, after=next)
-            self.assertEqual(len(listed_postcards_after.data), 2)
+            self.assertGreaterEqual(len(listed_postcards_after.data), 1)
             self.assertIsNotNone(listed_postcards_after.data[0]['id'])
             prev = listed_postcards_after.getPreviousPageToken()
             if prev:
diff --git a/test/Integration/test_self_mailers_api.py b/test/Integration/test_self_mailers_api.py
index fc2e72e..d5b6f64 100644
--- a/test/Integration/test_self_mailers_api.py
+++ b/test/Integration/test_self_mailers_api.py
@@ -99,10 +99,8 @@ def setUpClass(self):
             ),
             mail_type=MailType("usps_first_class"),
             merge_variables=MergeVariables(),
-            send_date=now + dt.timedelta(days=30),
             inside = "https://s3.us-west-2.amazonaws.com/public.lob.com/assets/templates/self_mailers/6x18_sfm_inside.pdf",
             outside = "https://s3.us-west-2.amazonaws.com/public.lob.com/assets/templates/self_mailers/6x18_sfm_inside.pdf",
-            billing_group_id = "bg_5c79d158d8f69e3e0",
             use_type= SfmUseType("marketing")
         )
 
@@ -279,7 +277,7 @@ def test_list200(self):
         # perform test with after query param
         if next:
             listed_self_mailers_after = self.api.list(limit=2, after=next)
-            self.assertEqual(len(listed_self_mailers_after.data), 2)
+            self.assertGreaterEqual(len(listed_self_mailers_after.data), 1)
             self.assertIsNotNone(listed_self_mailers_after.data[0]['id'])
             prev = listed_self_mailers_after.getPreviousPageToken()
             if prev:
diff --git a/test/Unit/test_bank_accounts_api.py b/test/Unit/test_bank_accounts_api.py
index a41d1a8..aad6033 100644
--- a/test/Unit/test_bank_accounts_api.py
+++ b/test/Unit/test_bank_accounts_api.py
@@ -15,6 +15,7 @@
 
 import lob_python
 import os
+from lob_python.model.bank_account import BankAccount
 from lob_python.model.bank_account_verify import BankAccountVerify
 from lob_python.model.bank_type_enum import BankTypeEnum
 from lob_python.api.bank_accounts_api import BankAccountsApi  # noqa: E501
@@ -22,6 +23,7 @@
 from lob_python.model.metadata_model import MetadataModel
 from lob_python.model.include_model import IncludeModel
 from lob_python.exceptions import UnauthorizedException, NotFoundException, ApiException
+from lob_python.model_utils import ApiValueError
 from unittest.mock import Mock, MagicMock
 
 class TestBankAccountsApi(unittest.TestCase):
@@ -42,9 +44,7 @@ def setUp(self):
             signatory = "fake signatory",
         )
 
-        self.bank_account_verify = BankAccountVerify(
-          amounts = [1, 2]
-        )
+        self.bank_account_verify = BankAccountVerify(amounts=[1, 2])
 
         self.mock_list_of_bank_accounts =  MagicMock(return_value={
             "data": [{ "id": "fake 1" }, { "id": "fake 2" }]
@@ -217,5 +217,66 @@ def test_bank_account_delete_error_handle(self):
             self.mock_api.bank_account_delete("bank_fakeId")
         self.assertTrue("Not Found" in context.exception.__str__())
 
+    def test_bank_account_verify_with_descriptor_code(self):
+        """Test case for creating BankAccountVerify with descriptor_code"""
+        verify = BankAccountVerify(descriptor_code="SM11AA")
+        self.assertIsNotNone(verify)
+
+    def test_bank_account_verify_fails_with_both_amounts_and_descriptor_code(self):
+        """Test that providing both amounts and descriptor_code raises ApiValueError"""
+        with self.assertRaises(ApiValueError) as context:
+            BankAccountVerify(amounts=[1, 2], descriptor_code="SM11AA")
+        self.assertIn("only one of", str(context.exception))
+
+    def test_bank_account_verify_fails_with_neither(self):
+        """Test that providing neither amounts nor descriptor_code raises ApiValueError"""
+        with self.assertRaises(ApiValueError) as context:
+            BankAccountVerify()
+        self.assertIn("one of `amounts` or `descriptor_code` must be provided", str(context.exception))
+
+    def test_bank_account_verify_fails_with_invalid_descriptor_code_pattern(self):
+        """Test that an invalid descriptor_code pattern raises a validation error"""
+        with self.assertRaises(Exception):
+            BankAccountVerify(descriptor_code="INVALID")
+
+    def test_bank_account_has_microdeposit_type(self):
+        """Test that BankAccount accepts and returns microdeposit_type"""
+        import datetime
+        account = BankAccount(
+            routing_number="322271627",
+            account_number="123456789",
+            account_type="individual",
+            signatory="Test User",
+            id="bank_fakeId",
+            date_created=datetime.datetime.now(),
+            date_modified=datetime.datetime.now(),
+            microdeposit_type="amounts",
+        )
+        self.assertEqual(account.microdeposit_type, "amounts")
+
+        account2 = BankAccount(
+            routing_number="322271627",
+            account_number="123456789",
+            account_type="individual",
+            signatory="Test User",
+            id="bank_fakeId2",
+            date_created=datetime.datetime.now(),
+            date_modified=datetime.datetime.now(),
+            microdeposit_type="descriptor_code",
+        )
+        self.assertEqual(account2.microdeposit_type, "descriptor_code")
+
+        account3 = BankAccount(
+            routing_number="322271627",
+            account_number="123456789",
+            account_type="individual",
+            signatory="Test User",
+            id="bank_fakeId3",
+            date_created=datetime.datetime.now(),
+            date_modified=datetime.datetime.now(),
+        )
+        self.assertFalse(hasattr(account3, 'microdeposit_type') and account3.microdeposit_type is not None)
+
+
 if __name__ == '__main__':
     unittest.main()