diff --git a/samples/hello/async_main.py b/samples/hello/async_main.py
index 5cb98ab9f..34159bedb 100644
--- a/samples/hello/async_main.py
+++ b/samples/hello/async_main.py
@@ -33,6 +33,9 @@
 from google.cloud.bigtable.data import row_filters
 # [END bigtable_async_hw_imports]
 
+# use to ignore warnings
+row_filters
+
 
 async def main(project_id, instance_id, table_id):
     # [START bigtable_async_hw_connect]
diff --git a/samples/hello/main.py b/samples/hello/main.py
index 57b9af37f..41124e826 100644
--- a/samples/hello/main.py
+++ b/samples/hello/main.py
@@ -36,6 +36,10 @@
 
 # [END bigtable_hw_imports]
 
+# use to avoid warnings
+row_filters
+column_family
+
 
 def main(project_id, instance_id, table_id):
     # [START bigtable_hw_connect]