diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 7770808d2a7..0068907d6af 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -233,6 +233,7 @@ Paulius Šileikis
 Paulus Schoutsen
 Pavel Kamaev
 Pavel Polyakov
+Pavel Sapezhko
 Pawel Kowalski
 Pawel Miech
 Pepe Osca
diff --git a/Makefile b/Makefile
index b95cb01eb57..ecab9915376 100644
--- a/Makefile
+++ b/Makefile
@@ -97,6 +97,11 @@ vtest: .develop
 vvtest: .develop
 	@pytest -vv
 
+.PHONY: cov-dev
+cov-dev: .develop
+	@pytest --cov-report=html
+	@echo "xdg-open file://`pwd`/htmlcov/index.html"
+
 .PHONY: clean
 clean:
 	@rm -rf `find . -name __pycache__`