diff --git a/Project.toml b/Project.toml
index 5ebcfa3f..d850558f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -36,6 +36,7 @@ julia = "1.6"
 [extras]
 SafeTestsets = "1bc83da4-3b8d-516f-aca4-4fe02f6d838f"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+ChainRulesTestUtils = "cdddcdb0-9152-4a09-a978-84456f9df70a"
 
 [targets]
-test = ["Test", "SafeTestsets"]
+test = ["Test", "SafeTestsets", "ChainRulesTestUtils"]