diff --git a/.gitignore b/.gitignore
index 84856ff4..99eea7b4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 .coverage
 build
 dist
+cover
 
 #
 # for GLOBAL
diff --git a/tox.ini b/tox.ini
index 9aecfc26..8b24d2f2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,7 +21,11 @@ commands = {posargs}
 [testenv:cover]
 setenv = VIRTUAL_ENV={envdir}
          NOSE_WITH_COVERAGE=1
+         NOSE_COVER_BRANCHES=1
          NOSE_COVER_PACKAGE=swift3
+         NOSE_COVER_HTML=1
+         NOSE_COVER_HTML_DIR={toxinidir}/cover
+         NOSE_COVER_ERASE=1
 
 [tox:jenkins]
 downloadcache = ~/cache/pip