diff --git a/test-requirements.txt b/test-requirements.txt
index 75e7615d9299328a06a138d4c8af533374367339..89e63d6ac71191c42c61748db750825d0f213b62 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,3 +1,4 @@
 bob.db.atnt
 bob.io.image
 matplotlib
+gridtk