diff --git a/pittgoogle/bigquery.py b/pittgoogle/bigquery.py
index a089419..f48dda2 100644
--- a/pittgoogle/bigquery.py
+++ b/pittgoogle/bigquery.py
@@ -166,7 +166,7 @@ def _check_bqstorage_client(user_value: bool | None) -> bool:
             return user_value
 
         try:
-            import google.cloud.bigquery_storage
+            import google.cloud.bigquery_storage  # noqa: F401
         except ModuleNotFoundError:
             return False
         return True
@@ -308,7 +308,8 @@ def schema(self) -> "pd.DataFrame":
                 child_fields = fld.pop("fields", [])
                 # Append parent field name so that the child field name has the syntax 'parent_name.child_name'.
                 # This is the syntax that should be used in SQL queries and also the one shown on BigQuery Console page.
-                [cfld.update(name=f"{fld['name']}.{cfld['name']}") for cfld in child_fields]
+                # The dicts update in place.
+                _ = [cfld.update(name=f"{fld['name']}.{cfld['name']}") for cfld in child_fields]
 
                 fields.extend([fld] + child_fields)
             self._schema = pd.DataFrame(fields)
diff --git a/pittgoogle/pubsub.py b/pittgoogle/pubsub.py
index 2a89020..abb0560 100644
--- a/pittgoogle/pubsub.py
+++ b/pittgoogle/pubsub.py
@@ -235,10 +235,10 @@ def touch(self) -> None:
                 # Assume this is a simple IAM problem rather than the user being confused about when
                 # to call this method (as can happen below).
                 msg = (
-                    f"PermissionDenied: You seem to have appropriate IAM permissions to get topics "
+                    "PermissionDenied: You seem to have appropriate IAM permissions to get topics "
                     "in this project but not to create them."
                 )
-            raise exceptions.CloudConnectionError(msg) from excep
+                raise exceptions.CloudConnectionError(msg) from excep
 
         except google.api_core.exceptions.PermissionDenied as excep:
             # User does not have permission to get this topic.