diff --git a/test/Cargo.toml b/test/Cargo.toml
index f5a403b..2720da4 100644
--- a/test/Cargo.toml
+++ b/test/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 riscv = "0.12.1"
-riscv-rt = "0.13.0"
+riscv-rt = { version = "0.13.0", features=["single-hart"] }
 lwcpu = { path = "../lwcpu" }
 
 # https://docs.rust-embedded.org/book/unsorted/speed-vs-size.html
diff --git a/test/Makefile b/test/Makefile
index 981c888..5ebcc59 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -12,7 +12,7 @@ extract: build
 size: extract
 	cargo size --release -- -A
 
-disassemble: build
+disassemble: extract
 	riscv32-elf-objdump -Cd "target/riscv32i-unknown-none-elf/release/${NAME}" | less
 
 clean: