diff --git a/utils/axe.py b/utils/axe.py
index 22662e01..6d73352b 100644
--- a/utils/axe.py
+++ b/utils/axe.py
@@ -16,6 +16,7 @@ class Axe():
     under test to identify any accessibility concerns.
     """
 
+    @staticmethod
     def run(
         page: Page,
         filename: str = "",
@@ -56,6 +57,7 @@ def run(
             json_report_generated=json_report_generated,
         )
 
+    @staticmethod
     def run_list(
         page: Page,
         page_list: list[str],
diff --git a/utils/date_time_utils.py b/utils/date_time_utils.py
index 5a8bf2ad..ec823e2c 100644
--- a/utils/date_time_utils.py
+++ b/utils/date_time_utils.py
@@ -6,9 +6,6 @@ class DateTimeUtils:
     A utility class for doing common actions with datetimes.
     """
 
-    def __init__(self):
-        pass
-
     @staticmethod
     def current_datetime(format_date: str = "%d/%m/%Y %H:%M") -> str:
         """Gets the current datetime in the specified format.
diff --git a/utils/nhs_number_tools.py b/utils/nhs_number_tools.py
index 0fc8882a..2b55ae0c 100644
--- a/utils/nhs_number_tools.py
+++ b/utils/nhs_number_tools.py
@@ -8,8 +8,6 @@ class NHSNumberTools:
     """
     A utility class providing functionality around NHS numbers.
     """
-    def __init__(self) -> None:
-        pass
 
     @staticmethod
     def _nhs_number_checks(nhs_number: str) -> None:
@@ -21,7 +19,7 @@ def _nhs_number_checks(nhs_number: str) -> None:
         """
         if not nhs_number.isnumeric():
             raise NHSNumberToolsException("The NHS number provided ({}) is not numeric.".format(nhs_number))
-        if not len(nhs_number) == 10:
+        if len(nhs_number) != 10:
             raise NHSNumberToolsException("The NHS number provided ({}) is not 10 digits.".format(nhs_number))
 
     @staticmethod
diff --git a/utils/user_tools.py b/utils/user_tools.py
index 85f19f22..c1694cc2 100644
--- a/utils/user_tools.py
+++ b/utils/user_tools.py
@@ -26,7 +26,7 @@ def retrieve_user(user: str) -> dict:
         with open(USERS_FILE, 'r') as file:
             user_data = json.loads(file.read())
 
-        if not user in user_data:
+        if user not in user_data:
             raise UserToolsException(f"User [{user}] is not present in users.json")
 
         logger.debug(f"Returning user: {user_data[user]}")