diff --git a/Makefile b/Makefile
index 9244677..23e9bde 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 .PHONY: test
 test:
-	uv run python -m pytest -v --cov=. --cov-config=.coveragerc --cov-fail-under=80 --cov-report term-missing
+	uv run python -m pytest -v --cov=. --cov-config=.coveragerc --cov-fail-under=100 --cov-report term-missing
 
 .PHONY: clean
 clean:
diff --git a/test_env_get_bool.py b/test_env_get_bool.py
index 3165de1..0e86cbf 100644
--- a/test_env_get_bool.py
+++ b/test_env_get_bool.py
@@ -1,10 +1,10 @@
-"""Test the get_bool_env_var function"""
+"""Test the get_bool_env_var and get_int_env_var functions"""
 
 import os
 import unittest
 from unittest.mock import patch
 
-from env import get_bool_env_var
+from env import get_bool_env_var, get_int_env_var
 
 
 class TestEnv(unittest.TestCase):
@@ -77,5 +77,21 @@ def test_get_bool_env_var_that_does_not_exist_and_default_value_returns_false(se
         self.assertFalse(result)
 
 
+class TestGetIntEnvVar(unittest.TestCase):
+    """Test the get_int_env_var function"""
+
+    @patch.dict(
+        os.environ,
+        {
+            "TEST_INT": "not_a_number",
+        },
+        clear=True,
+    )
+    def test_get_int_env_var_with_non_integer_value(self):
+        """Test that get_int_env_var returns None for non-integer values"""
+        result = get_int_env_var("TEST_INT")
+        self.assertIsNone(result)
+
+
 if __name__ == "__main__":
     unittest.main()
diff --git a/test_evergreen.py b/test_evergreen.py
index 90ce263..de5e5af 100644
--- a/test_evergreen.py
+++ b/test_evergreen.py
@@ -1,3 +1,4 @@
+# pylint: disable=too-many-lines
 """Test the evergreen.py module."""
 
 import unittest
@@ -253,6 +254,50 @@ def test_commit_changes(self, mock_uuid):
         # Assert that the function returned the expected result
         self.assertEqual(result, "MockPullRequest")
 
+    @patch("uuid.uuid4")
+    def test_commit_changes_with_existing_config(self, mock_uuid):
+        """Test the commit_changes function when updating an existing config."""
+        mock_uuid.return_value = uuid.UUID("12345678123456781234567812345678")
+        mock_repo = MagicMock()
+        mock_repo.default_branch = "main"
+        mock_repo.ref.return_value.object.sha = "abc123"
+        mock_repo.create_ref.return_value = True
+        mock_repo.create_pull.return_value = "MockPullRequest"
+        dependabot_file_name = ".github/dependabot.yml"
+
+        title = "Test Title"
+        body = "Test Body"
+        dependabot_file = 'dependencies:\n  - package_manager: "python"\n    directory: "/"\n    update_schedule: "live"'
+        branch_name = "dependabot-12345678-1234-5678-1234-567812345678"
+        commit_message = "Update " + dependabot_file_name
+        existing_config = b"existing content"
+
+        result = commit_changes(
+            title,
+            body,
+            mock_repo,
+            dependabot_file,
+            commit_message,
+            dependabot_file_name,
+            existing_config,
+        )
+
+        # Assert that file_contents().update was called instead of create_file
+        mock_repo.file_contents.assert_called_once_with(dependabot_file_name)
+        mock_repo.file_contents.return_value.update.assert_called_once_with(
+            message=commit_message,
+            content=dependabot_file.encode(),
+            branch=branch_name,
+        )
+        mock_repo.create_file.assert_not_called()
+        mock_repo.create_pull.assert_called_once_with(
+            title=title,
+            body=body,
+            head=branch_name,
+            base="main",
+        )
+        self.assertEqual(result, "MockPullRequest")
+
 
 class TestCheckPendingPullsForDuplicates(unittest.TestCase):
     """Test the check_pending_pulls_for_duplicates function."""
@@ -403,6 +448,30 @@ def test_get_repos_iterator_with_team(self, mock_github):
         # Assert that the function returned the expected result
         self.assertEqual(result, mock_team_repositories)
 
+    @patch("github3.login")
+    def test_get_repos_iterator_with_team_no_repos(self, mock_github):
+        """Test the get_repos_iterator function with a team that has no repositories"""
+        organization = "my_organization"
+        repository_list = []
+        team_name = "empty_team"
+        search_query = ""
+        github_connection = mock_github.return_value
+
+        github_connection.organization.return_value.team_by_name.return_value.repos_count = (
+            0
+        )
+
+        with self.assertRaises(SystemExit) as context:
+            get_repos_iterator(
+                organization,
+                team_name,
+                repository_list,
+                search_query,
+                github_connection,
+            )
+
+        self.assertEqual(context.exception.code, 1)
+
     @patch("github3.login")
     def test_get_repos_iterator_with_search_query(self, mock_github):
         """Test the get_repos_iterator function with a search query"""