diff --git a/tests/test_app.py b/tests/test_app.py
index 3e4ff390..b4d0b11c 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -1,4 +1,3 @@
-import os
 import siliconcompiler
 from scgallery.apps import sc_gallery