diff --git a/test/Project.toml b/test/Project.toml
index 73cc134ee..a54cb273f 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -39,6 +39,7 @@ ForwardDiff = "0.10.12"
 LogDensityProblems = "2"
 MCMCChains = "6.0.4"
 MacroTools = "0.5.5"
+ReverseDiff = "1"
 Setfield = "1"
 StableRNGs = "1"
 Tracker = "0.2.23"