diff --git a/src/dragonball/Makefile b/src/dragonball/Makefile
index ab8e5b6947..68ee3bd46d 100644
--- a/src/dragonball/Makefile
+++ b/src/dragonball/Makefile
@@ -39,12 +39,15 @@ clean:
 
 test:
 ifdef SUPPORT_VIRTUALIZATION
-	cargo test --all-features --target $(TRIPLE) -- --nocapture
+	RUST_BACKTRACE=1 cargo test --all-features --target $(TRIPLE) -- --nocapture --test-threads=1
 else
 	@echo "INFO: skip testing dragonball, it need virtualization support."
 	exit 0
 endif
 
+coverage:
+	RUST_BACKTRACE=1 cargo llvm-cov --all-features --target $(TRIPLE) -- --nocapture --test-threads=1
+
 endif # ifeq ($(ARCH), s390x)
 
 .DEFAULT_GOAL := default