diff --git a/justfile b/justfile
index 0edcc0754..a935c81c6 100644
--- a/justfile
+++ b/justfile
@@ -49,11 +49,11 @@ fmt:
   cd engine && dune fmt
 
 # Run hax tests: each test crate has a snapshot, so that we track changes in extracted code. If a snapshot changed, please review them with `just test-review`.
-test:
-  cargo test --test toolchain
+test *FLAGS:
+  cargo test --test toolchain {{FLAGS}}
 
-_test:
-  CARGO_TESTS_ASSUME_BUILT=1 cargo test --test toolchain
+_test *FLAGS:
+  CARGO_TESTS_ASSUME_BUILT=1 cargo test --test toolchain {{FLAGS}}
 
 # Review snapshots
 test-review: (_ensure_command_in_path "cargo-insta" "Insta (https://insta.rs)")