diff --git a/Library/Homebrew/test/Gemfile.lock b/Library/Homebrew/test/Gemfile.lock
index 05bfdd11b2..79b210d897 100644
--- a/Library/Homebrew/test/Gemfile.lock
+++ b/Library/Homebrew/test/Gemfile.lock
@@ -46,7 +46,7 @@ GEM
     rspec-support (3.8.0)
     rspec-wait (0.0.9)
       rspec (>= 3, < 4)
-    rubocop (0.63.1)
+    rubocop (0.64.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.5, != 2.5.1.1)
diff --git a/Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb b/Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb
index b77f9599a8..4b6f1bca27 100644
--- a/Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb
+++ b/Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb
@@ -255,7 +255,7 @@ shared_examples "#uninstall_phase or #zap_phase" do
         .with(
           "osascript",
         args: ["-e", 'tell application "System Events" to delete every login item whose name is "Fancy"'],
-      )
+        )
         .and_return(instance_double("SystemCommand::Result"))
 
       subject.public_send(:"#{artifact_dsl_key}_phase", command: fake_system_command)
diff --git a/Library/Homebrew/test/cask/installer_spec.rb b/Library/Homebrew/test/cask/installer_spec.rb
index a03290e124..ac19ed13bd 100644
--- a/Library/Homebrew/test/cask/installer_spec.rb
+++ b/Library/Homebrew/test/cask/installer_spec.rb
@@ -111,7 +111,7 @@ describe Cask::Installer, :cask do
       expect {
         Cask::Installer.new(with_installer_manual).install
       }.to output(
-        <<~EOS
+        <<~EOS,
           ==> Satisfying dependencies
           ==> Downloading file:#{HOMEBREW_LIBRARY_PATH}/test/support/fixtures/cask/caffeine.zip
           ==> Verifying SHA-256 checksum for Cask 'with-installer-manual'.
diff --git a/Library/Homebrew/test/descriptions_spec.rb b/Library/Homebrew/test/descriptions_spec.rb
index 7374068414..9fe327fd0e 100644
--- a/Library/Homebrew/test/descriptions_spec.rb
+++ b/Library/Homebrew/test/descriptions_spec.rb
@@ -20,7 +20,7 @@ describe Descriptions do
     descriptions_hash["somedev/external/foo"] = "External foo"
 
     expect { subject.print }.to output(
-      <<~EOS
+      <<~EOS,
         homebrew/core/foo: Core foo
         somedev/external/foo: External foo
       EOS
@@ -33,7 +33,7 @@ describe Descriptions do
     descriptions_hash["otherdev/external/foo"] = "Other external foo"
 
     expect { subject.print }.to output(
-      <<~EOS
+      <<~EOS,
         homebrew/core/foo: Core foo
         otherdev/external/foo: Other external foo
         somedev/external/foo: External foo
diff --git a/Library/Homebrew/test/messages_spec.rb b/Library/Homebrew/test/messages_spec.rb
index ae5a9fadfc..527b35d23e 100644
--- a/Library/Homebrew/test/messages_spec.rb
+++ b/Library/Homebrew/test/messages_spec.rb
@@ -61,7 +61,7 @@ describe Messages do
 
       it "prints caveat details" do
         expect { messages.display_messages }.to output(
-          <<~EOS
+          <<~EOS,
             ==> Caveats
             ==> foo
             Zsh completions were installed
@@ -88,7 +88,7 @@ describe Messages do
 
         it "prints installation times" do
           expect { messages.display_messages }.to output(
-            <<~EOS
+            <<~EOS,
               ==> Installation times
               foo                       1.100 s
             EOS
diff --git a/Library/Homebrew/vendor/Gemfile.lock b/Library/Homebrew/vendor/Gemfile.lock
index cbb0bd6da9..c6ab320754 100644
--- a/Library/Homebrew/vendor/Gemfile.lock
+++ b/Library/Homebrew/vendor/Gemfile.lock
@@ -43,7 +43,7 @@ GEM
     plist (3.5.0)
     powerpack (0.1.2)
     rainbow (3.0.0)
-    rubocop (0.63.1)
+    rubocop (0.64.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.5, != 2.5.1.1)
diff --git a/Library/Homebrew/vendor/bundle-standalone/bundler/setup.rb b/Library/Homebrew/vendor/bundle-standalone/bundler/setup.rb
index 11e6185af5..29ffecb742 100644
--- a/Library/Homebrew/vendor/bundle-standalone/bundler/setup.rb
+++ b/Library/Homebrew/vendor/bundle-standalone/bundler/setup.rb
@@ -37,6 +37,6 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/powerpack-0.1.2/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rainbow-3.0.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/ruby-progressbar-1.10.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/unicode-display_width-1.4.1/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-0.63.1/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-0.64.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-rspec-1.32.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/ruby-macho-2.1.0/lib"