diff --git a/Library/Homebrew/cmd/style.rb b/Library/Homebrew/cmd/style.rb
index 1f0d385dee..76d961a7fe 100644
--- a/Library/Homebrew/cmd/style.rb
+++ b/Library/Homebrew/cmd/style.rb
@@ -11,6 +11,8 @@
 #:    If `--display-cop-names` is passed, include the RuboCop cop name for each
 #:    violation in the output.
 #:
+#:    If `--rspec` is passed, install and use the RuboCop RSpec gem.
+#:
 #:    Passing `--only-cops=`<cops> will check for violations of only the listed
 #:    RuboCop <cops>, while `--except-cops=`<cops> will skip checking the listed
 #:    <cops>. For either option <cops> should be a comma-separated list of cop names.
@@ -83,6 +85,11 @@ module Homebrew
       args << "--parallel"
     end
 
+    if ARGV.include?("--rspec")
+      Homebrew.install_gem! "rubocop-rspec"
+      args += %w[--require rubocop-rspec]
+    end
+
     if options[:except_cops]
       options[:except_cops].map! { |cop| RuboCop::Cop::Cop.registry.qualified_cop_name(cop.to_s, "") }
       cops_to_exclude = options[:except_cops].select do |cop|
diff --git a/docs/Manpage.md b/docs/Manpage.md
index db6ff1cc7d..3479ec771d 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -436,6 +436,8 @@ With `--verbose` or `-v`, many commands print extra debugging information. Note
     If `--display-cop-names` is passed, include the RuboCop cop name for each
     violation in the output.
 
+    If `--rspec` is passed, install and use the RuboCop RSpec gem.
+
     Passing `--only-cops=``cops` will check for violations of only the listed
     RuboCop `cops`, while `--except-cops=``cops` will skip checking the listed
     `cops`. For either option `cops` should be a comma-separated list of cop names.
diff --git a/manpages/brew.1 b/manpages/brew.1
index 7bea0765f4..ca8c6f5f14 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -446,6 +446,9 @@ If \fB\-\-fix\fR is passed, automatically fix style violations using RuboCop\'s
 If \fB\-\-display\-cop\-names\fR is passed, include the RuboCop cop name for each violation in the output\.
 .
 .IP
+If \fB\-\-rspec\fR is passed, install and use the RuboCop RSpec gem\.
+.
+.IP
 Passing \fB\-\-only\-cops=\fR\fIcops\fR will check for violations of only the listed RuboCop \fIcops\fR, while \fB\-\-except\-cops=\fR\fIcops\fR will skip checking the listed \fIcops\fR\. For either option \fIcops\fR should be a comma\-separated list of cop names\.
 .
 .IP