diff --git a/test/Project.toml b/test/Project.toml
index 5f28957..4cb0191 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -15,6 +15,7 @@ Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 CSV = "0.10"
 CategoricalArrays = "0.10"
 DataFrames = "1"
+ForwardDiff = "0.10"
 ReverseDiff = "1"
 Statistics = "1"
 TimerOutputs = "0.5"