diff --git a/test/Project.toml b/test/Project.toml
index 589b150f4..874b10b6f 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -46,6 +46,7 @@ JET = "0.9 - 0.10.6"
 LogDensityProblems = "2"
 MCMCChains = "7.2.1"
 MacroTools = "0.5.6"
+MarginalLogDensities = "0.4"
 OrderedCollections = "1"
 ReverseDiff = "1"
 StableRNGs = "1"