diff --git a/installability/solver.py b/installability/solver.py
index 274ed53..9e1f1d8 100644
--- a/installability/solver.py
+++ b/installability/solver.py
@@ -16,7 +16,6 @@
 
 from __future__ import print_function
 
-from functools import partial
 import os
 
 from installability.tester import InstallabilityTester