diff --git a/nemu/Makefile b/nemu/Makefile
index d8b64d2..5d9af98 100644
--- a/nemu/Makefile
+++ b/nemu/Makefile
@@ -87,10 +87,7 @@ integration-tests: $(IMAGES)
 	@printf "$(COLOR_BLUE)RESULT:$(COLOR_NONE)\n\tALL: %s\n\tFAILED: %s\n" $(words $(IMAGES)) $(shell wc -l $(RESULT) | cut -f1 -d' ')
 	@printf "$(COLOR_RED)FAILED:$(COLOR_NONE)\n"
 	@cat $(RESULT)
-	@test -s $(RESULT); \
-	 r=$$?; \
-	 $(RM) $(RESULT); \
-	 test $$r -eq 0
+	@test ! -s $(RESULT); \ r=$$?; \ $(RM) $(RESULT); \ test $$r -eq 0
 
 test: unit-tests integration-tests
 	@$(OBJ_DIR)/tests/expr_test