diff --git a/rdmo/projects/utils.py b/rdmo/projects/utils.py
index 8a964f7334..5e5c374d43 100644
--- a/rdmo/projects/utils.py
+++ b/rdmo/projects/utils.py
@@ -102,10 +102,7 @@ def save_import_snapshot_values(project, snapshots, checked):
 
         for value in snapshot.snapshot_values:
             if value.attribute:
-                value_key = '{value.attribute.uri}[{snapshot_index}][{value.set_prefix}][{value.set_index}][{value.collection_index}]'.format(  # noqa: E501
-                    value=value,
-                    snapshot_index=snapshot.snapshot_index
-                )
+                value_key = f"{value.attribute.uri}[{snapshot.snapshot_index}][{value.set_prefix}][{value.set_index}][{value.collection_index}]" # noqa: E501
 
                 if value_key in checked:
                     # assert that this is a new value
diff --git a/rdmo/services/providers.py b/rdmo/services/providers.py
index 41b6530224..ea06629425 100644
--- a/rdmo/services/providers.py
+++ b/rdmo/services/providers.py
@@ -25,14 +25,14 @@ def get(self, request, url):
             response = requests.get(url, headers=self.get_authorization_headers(access_token))
 
             if response.status_code == 401:
-                logger.warn('get forbidden: %s (%s)', response.content, response.status_code)
+                logger.warning('get forbidden: %s (%s)', response.content, response.status_code)
             else:
                 try:
                     response.raise_for_status()
                     return self.get_success(request, response)
 
                 except requests.HTTPError:
-                    logger.warn('get error: %s (%s)', response.content, response.status_code)
+                    logger.warning('get error: %s (%s)', response.content, response.status_code)
 
                     return render(request, 'core/error.html', {
                         'title': _('OAuth error'),
@@ -53,14 +53,14 @@ def post(self, request, url, data):
             response = requests.post(url, json=data, headers=self.get_authorization_headers(access_token))
 
             if response.status_code == 401:
-                logger.warn('post forbidden: %s (%s)', response.content, response.status_code)
+                logger.warning('post forbidden: %s (%s)', response.content, response.status_code)
             else:
                 try:
                     response.raise_for_status()
                     return self.post_success(request, response)
 
                 except requests.HTTPError:
-                    logger.warn('post error: %s (%s)', response.content, response.status_code)
+                    logger.warning('post error: %s (%s)', response.content, response.status_code)
 
                     return render(request, 'core/error.html', {
                         'title': _('OAuth error'),