Less characters for Nathan :)

Change-Id: I4a9960ee4bb96b5fab86d5b09c4621e556788c12
diff --git a/voltha/adapters/adtran_onu/Makefile b/voltha/adapters/adtran_onu/Makefile
index 9dc2d07..e1f27ee 100644
--- a/voltha/adapters/adtran_onu/Makefile
+++ b/voltha/adapters/adtran_onu/Makefile
@@ -16,7 +16,7 @@
 PROFILING=
 endif
 
-RUN_PYTEST=$(IN_VENV) $(ADD_TO_PYTHONPATH) python -m pytest -vvlx $(PROFILING) --cov=$(WORKING_DIR) --cov-report term-missing --cov-report html
+RUN_PYTEST=$(IN_VENV) $(ADD_TO_PYTHONPATH) py.test -vvlx $(PROFILING) --cov=$(WORKING_DIR) --cov-report term-missing --cov-report html
 
 $(VENVDIR):
 	@virtualenv -p python2 $(VENVDIR)