diff --git a/.rspec b/.rspec
index db77bd0..2ba6782 100644
--- a/.rspec
+++ b/.rspec
@@ -1,8 +1,9 @@
 --require spec_helper
 --format documentation
 --color
-# `bundle exec rspec` runs the default suite (spec/dummy). The engine-
-# and isolated-engine suites each boot their own dummy Rails app and
-# must run in separate processes — invoke them via `rake spec:engine`
-# and `rake spec:isolated`, or all three with `rake spec:all`.
---exclude-pattern "spec/{engine,isolated,dummy_engine,dummy_isolated}/**/*"
+# `bundle exec rspec` runs the default suite (spec/dummy). The engine-,
+# isolated-engine and root-mounted suites each boot their own dummy
+# Rails app and must run in separate processes — invoke them via
+# `rake spec:engine`, `rake spec:isolated` and `rake spec:root`, or all
+# four with `rake spec:all`.
+--exclude-pattern "spec/{engine,isolated,root,dummy_engine,dummy_isolated,dummy_root}/**/*"