diff --git a/nvflare/app_opt/tf/scaffold.py b/nvflare/app_opt/tf/scaffold.py
index bcd022128a..0e7f0da6d7 100644
--- a/nvflare/app_opt/tf/scaffold.py
+++ b/nvflare/app_opt/tf/scaffold.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import copy
 
 import numpy as np
 import tensorflow as tf