diff --git a/src/allmydata/test/test_checker.py b/src/allmydata/test/test_checker.py
index eb94f5c23..758755e9c 100644
--- a/src/allmydata/test/test_checker.py
+++ b/src/allmydata/test/test_checker.py
@@ -19,7 +19,6 @@ from allmydata import uri as tahoe_uri
 from allmydata.interfaces import (
     IServer,
     ICheckResults,
-    IDeepCheckResults,
     ICheckAndRepairResults,
 )
 from allmydata.util import base32