diff --git a/hypha/apply/funds/admin_helpers.py b/hypha/apply/funds/admin_helpers.py
index 8922875cc4c3e823191bf8d30e4b1b294687da73..7d96bb1a454e4b40847cfd670647c618156de7bf 100644
--- a/hypha/apply/funds/admin_helpers.py
+++ b/hypha/apply/funds/admin_helpers.py
@@ -111,7 +111,7 @@ class ApplicationFormButtonHelper(ButtonHelper):
         )
         return {
             'classname': classnames,
-            'label': f'Copy',
+            'label': 'Copy',
             'title': f'Copy {form_name}',
             'url': self.url_helper.get_action_url('copy_form', admin.utils.quote(pk)),
         }
diff --git a/hypha/apply/funds/tests/test_views.py b/hypha/apply/funds/tests/test_views.py
index 46ad7bd97eef0f514cee1a31f1470bd8999a62b7..19a51b30aabc8a4cc2aed0869b55f77731755d6e 100644
--- a/hypha/apply/funds/tests/test_views.py
+++ b/hypha/apply/funds/tests/test_views.py
@@ -812,7 +812,7 @@ class TestApplicantSubmissionView(BaseSubmissionViewTestCase):
         def assert_create_review_not_displayed(submission):
             response = self.get_page(submission)
             # Ignore whitespace (including line breaks) in button text
-            pattern = re.compile(rf'\s*Add a review\s*')
+            pattern = re.compile(r'\s*Add a review\s*')
             buttons = BeautifulSoup(response.content, 'html5lib').find_all('a', class_='button--primary', text=pattern)
             self.assertEqual(len(buttons), 0)
 
diff --git a/hypha/apply/users/forms.py b/hypha/apply/users/forms.py
index 7b74060d9c68e0548d956dcbeedc0ce5c212b94a..55217ae8302cdc097fcbe2bfd2b8c880103e69e6 100644
--- a/hypha/apply/users/forms.py
+++ b/hypha/apply/users/forms.py
@@ -12,8 +12,8 @@ class CustomUserAdminFormBase():
         super().__init__(*args, **kwargs)
 
         # HACK: Wagtail admin doesn't work with custom User models that do not have first/last name.
-        self.fields['first_name'].widget = forms.HiddenInput(attrs={'value': f"Not used - see full_name"})
-        self.fields['last_name'].widget = forms.HiddenInput(attrs={'value': f"Not used - see full_name"})
+        self.fields['first_name'].widget = forms.HiddenInput(attrs={'value': 'Not used - see full_name'})
+        self.fields['last_name'].widget = forms.HiddenInput(attrs={'value': 'Not used - see full_name'})
 
 
 class CustomUserEditForm(CustomUserAdminFormBase, UserEditForm):