Don't run integration tox target by default when using tox command.
diff --git a/tox.ini b/tox.ini
index 4aaa250..c694451 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{pypy3.5,3.5,3.6,3.7,3.8},checks,lint,pylint,mypy,docs,integration,coverage
+envlist = py{pypy3.5,3.5,3.6,3.7,3.8},checks,lint,pylint,mypy,docs,coverage
 skipsdist = true
 
 [testenv]