diff --git a/test/Project.toml b/test/Project.toml
index b6f8ba75a..aac2dec42 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -40,6 +40,7 @@ Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [compat]
 AbstractMCMC = "5"
+AbstractPPL = "0.9"
 AdvancedMH = "0.6, 0.7, 0.8"
 AdvancedPS = "0.6.0"
 AdvancedVI = "0.2"