diff --git a/crates/ruff_testing_macros/Cargo.toml b/crates/ruff_testing_macros/Cargo.toml
index aeffa5946907b..101431dc709e5 100644
--- a/crates/ruff_testing_macros/Cargo.toml
+++ b/crates/ruff_testing_macros/Cargo.toml
@@ -13,4 +13,4 @@ proc-macro = true
 glob = { workspace = true }
 proc-macro2 = { workspace = true }
 quote = { workspace = true }
-syn = { workspace = true }
+syn = { workspace = true, features = ["extra-traits"] }