diff --git a/nemu/src/isa/riscv32/difftest/dut.c b/nemu/src/isa/riscv32/difftest/dut.c
index d6dd6f5..06748ce 100644
--- a/nemu/src/isa/riscv32/difftest/dut.c
+++ b/nemu/src/isa/riscv32/difftest/dut.c
@@ -19,9 +19,9 @@
 
 bool isa_difftest_checkregs(CPU_state *ref_r, vaddr_t pc) {
   for(int i = 0; i < MUXDEF(CONFIG_RVE, 16, 32); i++) {
-    difftest_check_reg(reg_name(i), pc, ref_r->gpr[i], gpr(i));
+    if(!difftest_check_reg(reg_name(i), pc, ref_r->gpr[i], gpr(i))) return false;
   }
-  return false;
+  return true;
 }
 
 void isa_difftest_attach() {