diff --git a/test/Project.toml b/test/Project.toml
index 09848c3..c4f62c5 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -29,6 +29,7 @@ InferOpt = {path = ".."}
 
 [compat]
 GridGraphs = "0.10"
+ImplicitDifferentiation = "0.9.2"
 JuliaFormatter = "2"
 Test = "1"
 UnicodePlots = "3.8.3"