diff --git a/nemu/Makefile b/nemu/Makefile
index 993c53f..03c8a4e 100644
--- a/nemu/Makefile
+++ b/nemu/Makefile
@@ -66,7 +66,6 @@ include $(NEMU_HOME)/tests/Makefile
 all-tests: TEST_OBJS = $(filter-out $(OBJ_DIR)/src/nemu-main.o, $(OBJS))
 all-tests: CFLAGS += $(shell pkg-config --cflags check)
 all-tests: LDFLAGS += $(shell pkg-config --libs check)
-all-tests: INC_PATH += $(NEMU_HOME)/src/isa/$(GUEST_ISA)/local-include
 all-tests: $(TEST_SRCS:%.c=$(OBJ_DIR)/%)
 
 test: all-tests
diff --git a/nemu/tests/Makefile b/nemu/tests/Makefile
index 6804b41..386d705 100644
--- a/nemu/tests/Makefile
+++ b/nemu/tests/Makefile
@@ -1,5 +1,6 @@
 TEST_SRCS += tests/expr_test.c
 YACC = bison
+INC_PATH += $(NEMU_HOME)/src/isa/$(GUEST_ISA)/local-include
 
 $(OBJ_DIR)/%: %.c $(TEST_OBJS) app
 	@mkdir -p $(dir $@)