diff --git a/tests/test_track_output/test_track_output.py b/tests/test_track_output/test_track_output.py
index c19d39e0a6..9e9ce87adb 100644
--- a/tests/test_track_output/test_track_output.py
+++ b/tests/test_track_output/test_track_output.py
@@ -2,6 +2,7 @@
 
 import glob
 import os
+from subprocess import call
 import shutil
 import sys
 sys.path.insert(0, os.pardir)