update Makefile [skip ci]

Author: takenori-y

Makefile

@@ -64,12 +64,12 @@ format: tool
 test-all: test-example test
 
 test: tool
-	[ -n "$(MODULE)" ] && module="--no-cov tests/test_$(MODULE).py" || module=; \
+	[ -n "$(MODULE)" ] && module="--no-cov tests/test_$(MODULE).py" || module=tests; \
 	. .venv/bin/activate && export PATH=./tools/SPTK/bin:$$PATH NUMBA_CUDA_LOW_OCCUPANCY_WARNINGS=0 PYLSTRAIGHT_DEBUG=1 && \
 	python -m pytest $$module $(OPT)
 
 test-example: tool
-	[ -n "$(MODULE)" ] && module=modules/$(MODULE).py || module=; \
+	[ -n "$(MODULE)" ] && module=modules/$(MODULE).py || module=modules; \
 	. .venv/bin/activate && export NUMBA_CUDA_LOW_OCCUPANCY_WARNINGS=0 && \
 	python -m pytest --doctest-modules --no-cov --ignore=$(PROJECT)/third_party $(PROJECT)/$$module