diff --git a/app/main/_blacklisted_passwords.py b/app/main/_commonly_used_passwords.py
similarity index 99%
rename from app/main/_blacklisted_passwords.py
rename to app/main/_commonly_used_passwords.py
index ecde9df21..f30052d77 100644
--- a/app/main/_blacklisted_passwords.py
+++ b/app/main/_commonly_used_passwords.py
@@ -1,4 +1,4 @@
-blacklisted_passwords = [
+commonly_used_passwords = [
     'govuknotify',
     'GOVUKnotify',
     'GOV.UK Notify',
diff --git a/app/main/forms.py b/app/main/forms.py
index 8884fdfa7..f75fe1f41 100644
--- a/app/main/forms.py
+++ b/app/main/forms.py
@@ -41,7 +41,7 @@ from wtforms.widgets import CheckboxInput, ListWidget
 
 from app import format_thousands
 from app.main.validators import (
-    Blacklist,
+    CommonlyUsedPassword,
     CsvFileValidator,
     DoesNotStartWithDoubleZero,
     LettersNumbersFullStopsAndUnderscoresOnly,
@@ -184,7 +184,7 @@ def password(label='Password'):
     return PasswordField(label,
                          validators=[DataRequired(message='Cannot be empty'),
                                      Length(8, 255, message='Must be at least 8 characters'),
-                                     Blacklist(message='Choose a password that’s harder to guess')])
+                                     CommonlyUsedPassword(message='Choose a password that’s harder to guess')])
 
 
 class SMSCode(StringField):
diff --git a/app/main/validators.py b/app/main/validators.py
index d16092445..3bf5b19fe 100644
--- a/app/main/validators.py
+++ b/app/main/validators.py
@@ -9,18 +9,18 @@ from notifications_utils.recipients import (
 from notifications_utils.sanitise_text import SanitiseSMS
 from wtforms import ValidationError
 
-from app.main._blacklisted_passwords import blacklisted_passwords
+from app.main._commonly_used_passwords import commonly_used_passwords
 from app.utils import Spreadsheet, is_gov_user
 
 
-class Blacklist:
+class CommonlyUsedPassword:
     def __init__(self, message=None):
         if not message:
-            message = 'Password is blacklisted.'
+            message = 'Password is in list of commonly used passwords.'
         self.message = message
 
     def __call__(self, form, field):
-        if field.data in blacklisted_passwords:
+        if field.data in commonly_used_passwords:
             raise ValidationError(self.message)
 
 
diff --git a/tests/app/main/views/test_register.py b/tests/app/main/views/test_register.py
index 090f100fc..f9cc72419 100644
--- a/tests/app/main/views/test_register.py
+++ b/tests/app/main/views/test_register.py
@@ -150,7 +150,7 @@ def test_should_add_user_details_to_session(
     assert session['user_details']['email'] == email_address
 
 
-def test_should_return_200_if_password_is_blacklisted(
+def test_should_return_200_if_password_is_on_list_of_commonly_used_passwords(
     client,
     mock_get_user_by_email,
     mock_login,