diff --git a/rust/Makefile b/rust/Makefile
index a250bc14..01c3530c 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -10,7 +10,7 @@ test:
 	cargo test -j 1
 
 test_auto:
-	cargo test -j default
+	cargo test
 
 test_%:
 	cargo test -j $*