diff --git a/makefile b/makefile
index f44ac83..6c49a92 100644
--- a/makefile
+++ b/makefile
@@ -4,6 +4,7 @@ TEST_FOLDERS := $(subst makefile,, $(MAKEFILESS))
 all: run
 
 run:
+	set -e && \
 	for test in $(TEST_FOLDERS) ; do \
 		make -C $$test all ; \
 	done
diff --git a/verilator.mk b/verilator.mk
index a515340..b63992b 100644
--- a/verilator.mk
+++ b/verilator.mk
@@ -14,8 +14,12 @@ $(VERILATOR_EXE): lint | $(SOURCES)
 	verilator $(VERILATOR_ARGS) $(SIMFILES) $(SOURCES) > /dev/null
 
 run: $(VERILATOR_EXE)
-	./$(VERILATOR_EXE) | tee output.txt; ./$(PARSER) $(PROJECT_NAME) $$? output.txt
+	# https://stackoverflow.com/questions/17757039/equivalent-of-pipefail-in-dash-shell
+	@mkfifo named_pipe
+	@tee output.txt < named_pipe &
+	@./$(VERILATOR_EXE) > named_pipe; ./$(PARSER) $(PROJECT_NAME) $$? output.txt
+	@rm named_pipe
 
 clean:
-	rm -rf obj_dir
-
+	@rm -rf obj_dir
+	@rm -f named_pipe