diff --git a/test/Project.toml b/test/Project.toml
index 230519787b..5ec9633e20 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -52,6 +52,7 @@ NNlib = "0.9.26"
 OffsetArrays = "1"
 OneHotArrays = "0.2.6"
 Optimisers = "0.4"
+Preferences = "1.4"
 PythonCall = "0.9"
 Random = "1.10"
 Random123 = "1.7"