diff --git a/instrumentation/opentelemetry-instrumentation-asgi/tests/test_asgi_custom_headers.py b/instrumentation/opentelemetry-instrumentation-asgi/tests/test_asgi_custom_headers.py
index 2573dad28e..c50839f72f 100644
--- a/instrumentation/opentelemetry-instrumentation-asgi/tests/test_asgi_custom_headers.py
+++ b/instrumentation/opentelemetry-instrumentation-asgi/tests/test_asgi_custom_headers.py
@@ -1,5 +1,4 @@
 import os
-from unittest import mock
 
 import opentelemetry.instrumentation.asgi as otel_asgi
 from opentelemetry.test.asgitestutil import AsgiTestBase