diff --git a/test/Project.toml b/test/Project.toml
index c6fbed19..f0cd2623 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -21,4 +21,5 @@ demumble_jll = "1e29f10c-031c-5a83-9565-69cddfc27673"
 
 [compat]
 Aqua = "0.8"
+LLVM = "9.10.1"
 ParallelTestRunner = "2"