--- a/Makefile	Wed Sep 30 18:23:43 2020 +0200
+++ b/Makefile	Wed Sep 30 18:10:53 2020 +0200
@@ -133,7 +133,7 @@
 rust-tests:
 	cd $(HGROOT)/rust/hg-cpython \
 		&& $(CARGO) test --quiet --all \
-			--no-default-features --features "$(py_feature)"
+			--no-default-features --features "$(py_feature) $(HG_RUST_FEATURES)"
 
 check-code:
 	hg manifest | xargs python contrib/check-code.py