diff --git a/Makefile b/Makefile
index 20ec7346f..937acb668 100644
--- a/Makefile
+++ b/Makefile
@@ -936,26 +936,24 @@ SH_ABC_TEST_DIRS += tests/alumacc
 seed-tests: $(SH_TEST_DIRS:%=seed-tests/%)
 .PHONY: seed-tests/%
 seed-tests/%: %/run-test.sh $(TARGETS) $(EXTRA_TARGETS)
-	+cd $* && bash run-test.sh $(SEEDOPT)
-	+@echo "...passed tests in $*"
+	+cd $* && /usr/bin/env time -f "PASS $* in %e seconds" sh -c 'bash run-test.sh $(SEEDOPT) 2>/dev/null >/dev/null'
 
 # abcopt-tests/ is a dummy string, not a directory
 .PHONY: abcopt-tests
 abcopt-tests: $(SH_ABC_TEST_DIRS:%=abcopt-tests/%)
 abcopt-tests/%: %/run-test.sh $(TARGETS) $(EXTRA_TARGETS)
-	+cd $* && bash run-test.sh $(ABCOPT) $(SEEDOPT)
-	+@echo "...passed tests in $*"
+	+cd $* && /usr/bin/env time -f "PASS $* in %e seconds" sh -c 'bash run-test.sh $(ABCOPT) $(SEEDOPT) 2>/dev/null >/dev/null'
 
 # makefile-tests/ is a dummy string, not a directory
 .PHONY: makefile-tests
 makefile-tests: $(MK_TEST_DIRS:%=makefile-tests/%)
 # this target actually emits .mk files
+.NOTINTERMEDIATE: %.mk
 %.mk:
 	+cd $(dir $*) && bash run-test.sh
 # this one spawns submake on each
 makefile-tests/%: %/run-test.mk $(TARGETS) $(EXTRA_TARGETS)
 	stdbuf -oL -eL $(MAKE) -C $* -f run-test.mk
-	+@echo "...passed tests in $*"
 
 test: makefile-tests abcopt-tests seed-tests
 	@echo ""
diff --git a/tests/gen-tests-makefile.sh b/tests/gen-tests-makefile.sh
index f7de58087..677f39a5d 100755
--- a/tests/gen-tests-makefile.sh
+++ b/tests/gen-tests-makefile.sh
@@ -9,7 +9,7 @@ generate_target() {
 	echo "all: $target_name"
 	echo ".PHONY: $target_name"
 	echo "$target_name:"
-	printf "\t@/usr/bin/env time -f \"PASS $target_name %%e seconds\" $test_command >/dev/null 2>/dev/null\n"
+	printf "\t@/usr/bin/env time -f \"PASS $target_name %%e seconds\" sh -c %q\n" "{ $test_command ;} >/dev/null 2>/dev/null"
 }
 
 # $ generate_ys_test ys_file [yosys_args]