diff --git a/Library/.rubocop_cask.yml b/Library/.rubocop_cask.yml
index fe874e591c..cc6ccf9a5f 100644
--- a/Library/.rubocop_cask.yml
+++ b/Library/.rubocop_cask.yml
@@ -1,5 +1,9 @@
 inherit_from: ./Homebrew/.rubocop.yml
 
+Cask/Desc:
+  Description: 'Ensure that the desc stanza conforms to various content and style checks.'
+  Enabled: true
+
 Cask/HomepageMatchesUrl:
   Description: 'Ensure that the homepage and url match, otherwise add a comment. More info at https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/stanzas/url.md#when-url-and-homepage-hostnames-differ-add-a-comment'
   Enabled: true
@@ -13,11 +17,11 @@ Cask/NoDslVersion:
   Enabled: true
 
 Cask/StanzaGrouping:
-  Description: 'Ensure that cask stanzas are grouped correctly. More info at https://github.com/Homebrew/homebrew-cask/blob/HEAD/CONTRIBUTING.md#stanza-order'
+  Description: 'Ensure that cask stanzas are grouped correctly. More info at https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/readme.md#stanza-order'
   Enabled: true
 
 Cask/StanzaOrder:
-  Description: 'Ensure that cask stanzas are sorted correctly. More info at https://github.com/Homebrew/homebrew-cask/blob/HEAD/CONTRIBUTING.md#stanza-order'
+  Description: 'Ensure that cask stanzas are sorted correctly. More info at https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/readme.md#stanza-order'
   Enabled: true
 
 # don't want these for casks but re-enabled for Library/Homebrew
diff --git a/Library/Homebrew/cask/cask.rb b/Library/Homebrew/cask/cask.rb
index 710753fa4a..bdda5b6e77 100644
--- a/Library/Homebrew/cask/cask.rb
+++ b/Library/Homebrew/cask/cask.rb
@@ -155,6 +155,7 @@ module Cask
       {
         "token"          => token,
         "name"           => name,
+        "desc"           => desc,
         "homepage"       => homepage,
         "url"            => url,
         "appcast"        => appcast,
diff --git a/Library/Homebrew/cask/cmd/create.rb b/Library/Homebrew/cask/cmd/create.rb
index 43145bfc35..0c9e44ed42 100644
--- a/Library/Homebrew/cask/cmd/create.rb
+++ b/Library/Homebrew/cask/cmd/create.rb
@@ -30,6 +30,7 @@ module Cask
 
             url "https://"
             name ""
+            desc ""
             homepage ""
 
             app ""
diff --git a/Library/Homebrew/cask/dsl.rb b/Library/Homebrew/cask/dsl.rb
index 87b83e8d3f..3f5ec39412 100644
--- a/Library/Homebrew/cask/dsl.rb
+++ b/Library/Homebrew/cask/dsl.rb
@@ -64,6 +64,7 @@ module Cask
                             :caveats,
                             :conflicts_with,
                             :container,
+                            :desc,
                             :depends_on,
                             :homepage,
                             :language,
@@ -93,6 +94,10 @@ module Cask
       @name.concat(args.flatten)
     end
 
+    def desc(description = nil)
+      set_unique_stanza(:desc, description.nil?) { description }
+    end
+
     def set_unique_stanza(stanza, should_return)
       return instance_variable_get("@#{stanza}") if should_return
 
diff --git a/Library/Homebrew/rubocops/cask/ast/cask_header.rb b/Library/Homebrew/rubocops/cask/ast/cask_header.rb
index 8668c2daad..7646552eec 100644
--- a/Library/Homebrew/rubocops/cask/ast/cask_header.rb
+++ b/Library/Homebrew/rubocops/cask/ast/cask_header.rb
@@ -29,7 +29,13 @@ module RuboCop
         end
 
         def cask_token
-          @cask_token ||= pair_node.val_node.children.first
+          @cask_token ||= begin
+            if dsl_version?
+              pair_node.val_node.children.first
+            else
+              method_node.first_argument.str_content
+            end
+          end
         end
 
         def hash_node
diff --git a/Library/Homebrew/rubocops/cask/constants/stanza.rb b/Library/Homebrew/rubocops/cask/constants/stanza.rb
index 00335bb1f2..e0bda8dc7b 100644
--- a/Library/Homebrew/rubocops/cask/constants/stanza.rb
+++ b/Library/Homebrew/rubocops/cask/constants/stanza.rb
@@ -6,7 +6,7 @@ module RuboCop
     module Constants
       STANZA_GROUPS = [
         [:version, :sha256],
-        [:url, :appcast, :name, :homepage],
+        [:url, :appcast, :desc, :name, :homepage],
         [
           :auto_updates,
           :conflicts_with,
diff --git a/Library/Homebrew/rubocops/cask/desc.rb b/Library/Homebrew/rubocops/cask/desc.rb
new file mode 100644
index 0000000000..90ceefab9f
--- /dev/null
+++ b/Library/Homebrew/rubocops/cask/desc.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+require "forwardable"
+require "uri"
+require "rubocops/cask/mixin/on_desc_stanza"
+require "rubocops/shared/desc_helper"
+
+module RuboCop
+  module Cop
+    module Cask
+      # This cop audits `desc` in Casks.
+      # See the `DescHelper` module for details of the checks.
+      class Desc < Cop
+        include OnDescStanza
+        include DescHelper
+
+        def on_desc_stanza(stanza)
+          name = cask_block.header.cask_token
+          desc_call = stanza.stanza_node
+          audit_desc(:cask, name, desc_call)
+        end
+
+        def autocorrect(node)
+          name = cask_block.header.cask_token
+          autocorrect_desc(node, name)
+        end
+      end
+    end
+  end
+end
diff --git a/Library/Homebrew/rubocops/cask/mixin/on_desc_stanza.rb b/Library/Homebrew/rubocops/cask/mixin/on_desc_stanza.rb
new file mode 100644
index 0000000000..067b6c30e4
--- /dev/null
+++ b/Library/Homebrew/rubocops/cask/mixin/on_desc_stanza.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module RuboCop
+  module Cop
+    module Cask
+      # Common functionality for checking desc stanzas.
+      module OnDescStanza
+        extend Forwardable
+        include CaskHelp
+
+        def on_cask(cask_block)
+          @cask_block = cask_block
+
+          toplevel_stanzas.select(&:desc?).each do |stanza|
+            on_desc_stanza(stanza)
+          end
+        end
+
+        private
+
+        attr_reader :cask_block
+
+        def_delegators :cask_block,
+                       :toplevel_stanzas
+      end
+    end
+  end
+end
diff --git a/Library/Homebrew/rubocops/cask/stanza_grouping.rb b/Library/Homebrew/rubocops/cask/stanza_grouping.rb
index c29d8d71c8..b49101e63c 100644
--- a/Library/Homebrew/rubocops/cask/stanza_grouping.rb
+++ b/Library/Homebrew/rubocops/cask/stanza_grouping.rb
@@ -6,7 +6,7 @@ module RuboCop
   module Cop
     module Cask
       # This cop checks that a cask's stanzas are grouped correctly.
-      # See https://github.com/Homebrew/homebrew-cask/blob/HEAD/CONTRIBUTING.md#stanza-order
+      # See https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/readme.md#stanza-order
       # for more info.
       class StanzaGrouping < Cop
         extend Forwardable
diff --git a/Library/Homebrew/rubocops/cask/stanza_order.rb b/Library/Homebrew/rubocops/cask/stanza_order.rb
index 71dad3cb8e..41b818df6c 100644
--- a/Library/Homebrew/rubocops/cask/stanza_order.rb
+++ b/Library/Homebrew/rubocops/cask/stanza_order.rb
@@ -6,7 +6,7 @@ module RuboCop
   module Cop
     module Cask
       # This cop checks that a cask's stanzas are ordered correctly.
-      # See https://github.com/Homebrew/homebrew-cask/blob/HEAD/CONTRIBUTING.md#stanza-order
+      # See https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/readme.md#stanza-order
       # for more info.
       class StanzaOrder < Cop
         extend Forwardable
diff --git a/Library/Homebrew/rubocops/extend/formula.rb b/Library/Homebrew/rubocops/extend/formula.rb
index b7e5bfccb8..8f165acc68 100644
--- a/Library/Homebrew/rubocops/extend/formula.rb
+++ b/Library/Homebrew/rubocops/extend/formula.rb
@@ -10,11 +10,13 @@ ensure
 end
 
 require "extend/string"
+require "rubocops/shared/helper_functions"
 
 module RuboCop
   module Cop
     class FormulaCop < Cop
       include RangeHelp
+      include HelperFunctions
 
       attr_accessor :file_path
 
@@ -32,28 +34,6 @@ module RuboCop
         audit_formula(node, class_node, parent_class_node, @body)
       end
 
-      # Checks for regex match of pattern in the node and
-      # sets the appropriate instance variables to report the match
-      def regex_match_group(node, pattern)
-        string_repr = string_content(node).encode("UTF-8", invalid: :replace)
-        match_object = string_repr.match(pattern)
-        return unless match_object
-
-        node_begin_pos = start_column(node)
-        line_begin_pos = line_start_column(node)
-        @column = if node_begin_pos == line_begin_pos
-          node_begin_pos + match_object.begin(0) - line_begin_pos
-        else
-          node_begin_pos + match_object.begin(0) - line_begin_pos + 1
-        end
-        @length = match_object.to_s.length
-        @line_no = line_number(node)
-        @source_buf = source_buffer(node)
-        @offense_source_range = source_range(@source_buf, @line_no, @column, @length)
-        @offensive_node = node
-        match_object
-      end
-
       # Yields to block when there is a match.
       # @param urls [Array] url/mirror method call nodes
       # @param regex [Regexp] pattern to match urls
@@ -442,26 +422,11 @@ module RuboCop
         end
       end
 
-      # Returns the begin position of the node's line in source code
-      def line_start_column(node)
-        node.source_range.source_buffer.line_range(node.loc.line).begin_pos
-      end
-
-      # Returns the begin position of the node in source code
-      def start_column(node)
-        node.source_range.begin_pos
-      end
-
       # Returns the ending position of the node in source code
       def end_column(node)
         node.source_range.end_pos
       end
 
-      # Returns the line number of the node
-      def line_number(node)
-        node.loc.line
-      end
-
       # Returns the class node's name, nil if not a class node
       def class_name(node)
         @offensive_node = node
@@ -484,35 +449,6 @@ module RuboCop
         block.loc.end.line - block.loc.begin.line
       end
 
-      # Source buffer is required as an argument to report style violations
-      def source_buffer(node)
-        node.source_range.source_buffer
-      end
-
-      # Returns the string representation if node is of type str(plain) or dstr(interpolated) or const
-      def string_content(node)
-        case node.type
-        when :str
-          node.str_content
-        when :dstr
-          content = ""
-          node.each_child_node(:str, :begin) do |child|
-            content += if child.begin_type?
-              child.source
-            else
-              child.str_content
-            end
-          end
-          content
-        when :const
-          node.const_name
-        when :sym
-          node.children.first.to_s
-        else
-          ""
-        end
-      end
-
       # Returns true if the formula is versioned
       def versioned_formula?
         @formula_name.include?("@")
@@ -532,10 +468,6 @@ module RuboCop
         match_obj[1]
       end
 
-      def problem(msg)
-        add_offense(@offensive_node, location: @offense_source_range, message: msg)
-      end
-
       private
 
       def formula_class?(node)
diff --git a/Library/Homebrew/rubocops/formula_desc.rb b/Library/Homebrew/rubocops/formula_desc.rb
index 3449ee43a8..57e5066e13 100644
--- a/Library/Homebrew/rubocops/formula_desc.rb
+++ b/Library/Homebrew/rubocops/formula_desc.rb
@@ -1,105 +1,24 @@
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
+require "rubocops/shared/desc_helper"
 require "extend/string"
 
 module RuboCop
   module Cop
     module FormulaAudit
       # This cop audits `desc` in Formulae.
-      #
-      # - Checks for existence of `desc`
-      # - Checks if size of `desc` > 80
-      # - Checks for leading/trailing whitespace in `desc`
-      # - Checks if `desc` begins with an article
-      # - Checks for correct usage of `command-line` in `desc`
-      # - Checks description starts with a capital letter
-      # - Checks if `desc` contains the formula name
-      # - Checks if `desc` ends with a full stop (apart from in the case of "etc.")
+      # See the `DescHelper` module for details of the checks.
       class Desc < FormulaCop
-        VALID_LOWERCASE_WORDS = %w[
-          macOS
-        ].freeze
+        include DescHelper
 
         def audit_formula(_node, _class_node, _parent_class_node, body_node)
           desc_call = find_node_method_by_name(body_node, :desc)
-
-          # Check if a formula's desc is present
-          if desc_call.nil?
-            problem "Formula should have a desc (Description)."
-            return
-          end
-
-          desc = parameters(desc_call).first
-
-          # Check the formula's desc length. Should be >0 and <80 characters.
-          pure_desc_length = string_content(desc).length
-          if pure_desc_length.zero?
-            problem "The desc (description) should not be an empty string."
-            return
-          end
-
-          # Check for leading whitespace.
-          problem "Description shouldn't have a leading space" if regex_match_group(desc, /^\s+/)
-
-          # Check for trailing whitespace.
-          problem "Description shouldn't have a trailing space" if regex_match_group(desc, /\s+$/)
-
-          # Check if command-line is wrongly used in formula's desc
-          if match = regex_match_group(desc, /(command ?line)/i)
-            c = match.to_s[0]
-            problem "Description should use \"#{c}ommand-line\" instead of \"#{match}\""
-          end
-
-          # Check if a/an are used in a formula's desc
-          if match = regex_match_group(desc, /^(an?)\s/i)
-            problem "Description shouldn't start with an indefinite article, i.e. \"#{match.to_s.strip}\""
-          end
-
-          # Check if invalid uppercase words are at the start of a
-          # formula's desc
-          if !VALID_LOWERCASE_WORDS.include?(string_content(desc).split.first) &&
-             regex_match_group(desc, /^[a-z]/)
-            problem "Description should start with a capital letter"
-          end
-
-          # Check if formula's desc starts with formula's name
-          if regex_match_group(desc, /^#{@formula_name} /i)
-            problem "Description shouldn't start with the formula name"
-          end
-
-          # Check if a full stop is used at the end of a formula's desc (apart from in the case of "etc.")
-          if regex_match_group(desc, /\.$/) && !string_content(desc).end_with?("etc.")
-            problem "Description shouldn't end with a full stop"
-          end
-
-          desc_length = "#{@formula_name}: #{string_content(desc)}".length
-          max_desc_length = 80
-          return if desc_length <= max_desc_length
-
-          problem "Description is too long. \"name: desc\" should be less than #{max_desc_length} characters. " \
-                  "Length is calculated as #{@formula_name} + desc. (currently #{desc_length})"
+          audit_desc(:formula, @formula_name, desc_call)
         end
 
         def autocorrect(node)
-          lambda do |corrector|
-            correction = node.source
-            first_word = string_content(node).split.first
-            unless VALID_LOWERCASE_WORDS.include?(first_word)
-              first_char = first_word.to_s[0]
-              correction.sub!(/^(['"]?)([a-z])/, "\\1#{first_char.upcase}") if first_char
-            end
-            correction.sub!(/^(['"]?)an?\s/i, "\\1")
-            correction.gsub!(/(ommand ?line)/i, "ommand-line")
-            correction.gsub!(/(^|[^a-z])#{@formula_name}([^a-z]|$)/i, "\\1\\2")
-            correction.gsub!(/^(['"]?)\s+/, "\\1")
-            correction.gsub!(/\s+(['"]?)$/, "\\1")
-            correction.gsub!(/\.(['"]?)$/, "\\1")
-            correction.gsub!(/^\s+/, "")
-            correction.gsub!(/\s+$/, "")
-            corrector.insert_before(node.source_range, correction)
-            corrector.remove(node.source_range)
-          end
+          autocorrect_desc(node, @formula_name)
         end
       end
     end
diff --git a/Library/Homebrew/rubocops/rubocop-cask.rb b/Library/Homebrew/rubocops/rubocop-cask.rb
index 3af610ebef..646e483994 100644
--- a/Library/Homebrew/rubocops/rubocop-cask.rb
+++ b/Library/Homebrew/rubocops/rubocop-cask.rb
@@ -11,6 +11,7 @@ require "rubocops/cask/extend/string"
 require "rubocops/cask/extend/node"
 require "rubocops/cask/mixin/cask_help"
 require "rubocops/cask/mixin/on_homepage_stanza"
+require "rubocops/cask/desc"
 require "rubocops/cask/homepage_matches_url"
 require "rubocops/cask/homepage_url_trailing_slash"
 require "rubocops/cask/no_dsl_version"
diff --git a/Library/Homebrew/rubocops/shared/desc_helper.rb b/Library/Homebrew/rubocops/shared/desc_helper.rb
new file mode 100644
index 0000000000..1ff7a80ad7
--- /dev/null
+++ b/Library/Homebrew/rubocops/shared/desc_helper.rb
@@ -0,0 +1,99 @@
+# frozen_string_literal: true
+
+require "rubocops/shared/helper_functions"
+
+module RuboCop
+  module Cop
+    # This module performs common checks the `desc` field in both Formulae and Casks.
+    module DescHelper
+      include HelperFunctions
+
+      VALID_LOWERCASE_WORDS = %w[
+        macOS
+      ].freeze
+
+      def audit_desc(type, name, desc_call)
+        # Check if a desc is present.
+        if desc_call.nil?
+          problem "#{type.to_s.capitalize} should have a desc (Description)."
+          return
+        end
+
+        desc = desc_call.first_argument
+
+        # Check if the desc is empty.
+        pure_desc_length = string_content(desc).length
+        if pure_desc_length.zero?
+          problem "The desc (description) should not be an empty string."
+          return
+        end
+
+        # Check the desc for leading whitespace.
+        problem "Description shouldn't have leading spaces." if regex_match_group(desc, /^\s+/)
+
+        # Check the desc for trailing whitespace.
+        problem "Description shouldn't have trailing spaces." if regex_match_group(desc, /\s+$/)
+
+        # Check if "command-line" is spelled incorrectly in the desc.
+        if match = regex_match_group(desc, /(command ?line)/i)
+          c = match.to_s[0]
+          problem "Description should use \"#{c}ommand-line\" instead of \"#{match}\"."
+        end
+
+        # Check if the desc starts with "A" or "An".
+        if match = regex_match_group(desc, /^(an?)(?=\s)/i)
+          problem "Description shouldn't start with an indefinite article, i.e. \"#{match}\"."
+        end
+
+        # Check if invalid lowercase words are at the start of a desc.
+        if !VALID_LOWERCASE_WORDS.include?(string_content(desc).split.first) &&
+           regex_match_group(desc, /^[a-z]/)
+          problem "Description should start with a capital letter."
+        end
+
+        # Check if the desc starts with the formula's or cask's name.
+        problem "Description shouldn't start with the #{type} name." if regex_match_group(desc, /^#{name} /i)
+
+        # Check if a full stop is used at the end of a desc (apart from in the case of "etc.").
+        if regex_match_group(desc, /\.$/) && !string_content(desc).end_with?("etc.")
+          problem "Description shouldn't end with a full stop."
+        end
+
+        # Check if the desc length exceeds 80 characters.
+        desc_length = "#{name}: #{string_content(desc)}".length
+        max_desc_length = 80
+        return if desc_length <= max_desc_length
+
+        problem "Description is too long. \"name: desc\" should be less than #{max_desc_length} characters. " \
+                "The current combined length is #{desc_length}."
+      end
+
+      def autocorrect_desc(node, name)
+        lambda do |corrector|
+          /\A(?<quote>["'])(?<correction>.*)(?:\k<quote>)\Z/ =~ node.source
+
+          next if correction.nil?
+
+          correction.gsub!(/^\s+/, "")
+          correction.gsub!(/\s+$/, "")
+
+          correction.sub!(/^an?\s+/i, "")
+
+          first_word = correction.split.first
+          unless VALID_LOWERCASE_WORDS.include?(first_word)
+            first_char = first_word.to_s[0]
+            correction[0] = first_char.upcase if first_char
+          end
+
+          correction.gsub!(/(ommand ?line)/i, "ommand-line")
+          correction.gsub!(/(^|[^a-z])#{name}([^a-z]|$)/i, "\\1\\2")
+          correction.gsub!(/^\s+/, "")
+          correction.gsub!(/\s+$/, "")
+          correction.gsub!(/\.$/, "")
+
+          corrector.replace(node.source_range, "#{quote}#{correction}#{quote}")
+        end
+      end
+    end
+  end
+end
diff --git a/Library/Homebrew/rubocops/shared/helper_functions.rb b/Library/Homebrew/rubocops/shared/helper_functions.rb
new file mode 100644
index 0000000000..a5e893c6ae
--- /dev/null
+++ b/Library/Homebrew/rubocops/shared/helper_functions.rb
@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+module RuboCop
+  module Cop
+    module HelperFunctions
+      include RangeHelp
+
+      # Checks for regex match of pattern in the node and
+      # sets the appropriate instance variables to report the match
+      def regex_match_group(node, pattern)
+        string_repr = string_content(node).encode("UTF-8", invalid: :replace)
+        match_object = string_repr.match(pattern)
+        return unless match_object
+
+        node_begin_pos = start_column(node)
+        line_begin_pos = line_start_column(node)
+        @column = if node_begin_pos == line_begin_pos
+          node_begin_pos + match_object.begin(0) - line_begin_pos
+        else
+          node_begin_pos + match_object.begin(0) - line_begin_pos + 1
+        end
+        @length = match_object.to_s.length
+        @line_no = line_number(node)
+        @source_buf = source_buffer(node)
+        @offense_source_range = source_range(@source_buf, @line_no, @column, @length)
+        @offensive_node = node
+        match_object
+      end
+
+      # Returns the begin position of the node's line in source code
+      def line_start_column(node)
+        node.source_range.source_buffer.line_range(node.loc.line).begin_pos
+      end
+
+      # Returns the begin position of the node in source code
+      def start_column(node)
+        node.source_range.begin_pos
+      end
+
+      # Returns the line number of the node
+      def line_number(node)
+        node.loc.line
+      end
+
+      # Source buffer is required as an argument to report style violations
+      def source_buffer(node)
+        node.source_range.source_buffer
+      end
+
+      # Returns the string representation if node is of type str(plain) or dstr(interpolated) or const
+      def string_content(node)
+        case node.type
+        when :str
+          node.str_content
+        when :dstr
+          content = ""
+          node.each_child_node(:str, :begin) do |child|
+            content += if child.begin_type?
+              child.source
+            else
+              child.str_content
+            end
+          end
+          content
+        when :const
+          node.const_name
+        when :sym
+          node.children.first.to_s
+        else
+          ""
+        end
+      end
+
+      def problem(msg)
+        add_offense(@offensive_node, location: @offense_source_range, message: msg)
+      end
+    end
+  end
+end
diff --git a/Library/Homebrew/test/cask/cmd/create_spec.rb b/Library/Homebrew/test/cask/cmd/create_spec.rb
index d656e90d44..ab9a0c95b2 100644
--- a/Library/Homebrew/test/cask/cmd/create_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/create_spec.rb
@@ -35,6 +35,7 @@ describe Cask::Cmd::Create, :cask do
 
         url "https://"
         name ""
+        desc ""
         homepage ""
 
         app ""
diff --git a/Library/Homebrew/test/cask/cmd/list_spec.rb b/Library/Homebrew/test/cask/cmd/list_spec.rb
index 82a486b0d5..b3af63e31f 100644
--- a/Library/Homebrew/test/cask/cmd/list_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/list_spec.rb
@@ -90,7 +90,7 @@ describe Cask::Cmd::List, :cask do
     let(:casks) { ["local-caffeine", "local-transmission"] }
     let(:expected_output) {
       <<~EOS
-        [{"token":"local-caffeine","name":[],"homepage":"https://brew.sh/","url":"file:///usr/local/Homebrew/Library/Homebrew/test/support/fixtures/cask/caffeine.zip","appcast":null,"version":"1.2.3","sha256":"67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94","artifacts":[["Caffeine.app"]],"caveats":null,"depends_on":{},"conflicts_with":null,"container":null,"auto_updates":null},{"token":"local-transmission","name":["Transmission"],"homepage":"https://brew.sh/","url":"file:///usr/local/Homebrew/Library/Homebrew/test/support/fixtures/cask/transmission-2.61.dmg","appcast":null,"version":"2.61","sha256":"e44ffa103fbf83f55c8d0b1bea309a43b2880798dae8620b1ee8da5e1095ec68","artifacts":[["Transmission.app"]],"caveats":null,"depends_on":{},"conflicts_with":null,"container":null,"auto_updates":null}]
+        [{"token":"local-caffeine","name":[],"desc":null,"homepage":"https://brew.sh/","url":"file:///usr/local/Homebrew/Library/Homebrew/test/support/fixtures/cask/caffeine.zip","appcast":null,"version":"1.2.3","sha256":"67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94","artifacts":[["Caffeine.app"]],"caveats":null,"depends_on":{},"conflicts_with":null,"container":null,"auto_updates":null},{"token":"local-transmission","name":["Transmission"],"desc":null,"homepage":"https://brew.sh/","url":"file:///usr/local/Homebrew/Library/Homebrew/test/support/fixtures/cask/transmission-2.61.dmg","appcast":null,"version":"2.61","sha256":"e44ffa103fbf83f55c8d0b1bea309a43b2880798dae8620b1ee8da5e1095ec68","artifacts":[["Transmission.app"]],"caveats":null,"depends_on":{},"conflicts_with":null,"container":null,"auto_updates":null}]
       EOS
     }
 
diff --git a/Library/Homebrew/test/cask/dsl_spec.rb b/Library/Homebrew/test/cask/dsl_spec.rb
index 949a1c804f..cebf4c1af7 100644
--- a/Library/Homebrew/test/cask/dsl_spec.rb
+++ b/Library/Homebrew/test/cask/dsl_spec.rb
@@ -107,6 +107,16 @@ describe Cask::DSL, :cask do
     end
   end
 
+  describe "desc stanza" do
+    it "lets you set the description via a desc stanza" do
+      cask = Cask::Cask.new("desc-cask") do
+        desc "The package's description"
+      end
+
+      expect(cask.desc).to eq("The package's description")
+    end
+  end
+
   describe "sha256 stanza" do
     it "lets you set checksum via sha256" do
       cask = Cask::Cask.new("checksum-cask") do
diff --git a/Library/Homebrew/test/rubocops/cask/desc_spec.rb b/Library/Homebrew/test/rubocops/cask/desc_spec.rb
new file mode 100644
index 0000000000..28a2b6d3f7
--- /dev/null
+++ b/Library/Homebrew/test/rubocops/cask/desc_spec.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require "rubocops/rubocop-cask"
+require "test/rubocops/cask/shared_examples/cask_cop"
+
+describe RuboCop::Cop::Cask::Desc do
+  include CaskCop
+
+  subject(:cop) { described_class.new }
+
+  context "with incorrect `desc` stanza" do
+    let(:source) {
+      <<~RUBY
+        cask "foo" do
+          desc "A bar program"
+        end
+      RUBY
+    }
+    let(:correct_source) {
+      <<~RUBY
+        cask "foo" do
+          desc "Bar program"
+        end
+      RUBY
+    }
+    let(:expected_offenses) do
+      [{
+        message:  "Description shouldn't start with an indefinite article, i.e. \"A\".",
+        severity: :convention,
+        line:     2,
+        column:   8,
+        source:   "A",
+      }]
+    end
+
+    include_examples "reports offenses"
+
+    include_examples "autocorrects source"
+  end
+
+  context "with correct `desc` stanza" do
+    let(:source) {
+      <<~RUBY
+        cask "foo" do
+          desc "Bar program"
+        end
+      RUBY
+    }
+
+    include_examples "does not report any offenses"
+  end
+end
diff --git a/Library/Homebrew/test/rubocops/cask/no_dsl_version_spec.rb b/Library/Homebrew/test/rubocops/cask/no_dsl_version_spec.rb
index 9f52bd7bf2..2f6d5747c7 100644
--- a/Library/Homebrew/test/rubocops/cask/no_dsl_version_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/no_dsl_version_spec.rb
@@ -8,31 +8,27 @@ describe RuboCop::Cop::Cask::NoDslVersion do
 
   subject(:cop) { described_class.new }
 
-  context "with header method `cask`" do
-    let(:header_method) { "cask" }
+  context "with no dsl version" do
+    let(:source) { "cask 'foo' do; end" }
 
-    context "with no dsl version" do
-      let(:source) { "cask 'foo' do; end" }
+    include_examples "does not report any offenses"
+  end
 
-      include_examples "does not report any offenses"
+  context "with dsl version" do
+    let(:source) { "cask :v1 => 'foo' do; end" }
+    let(:correct_source) { "cask 'foo' do; end" }
+    let(:expected_offenses) do
+      [{
+        message:  "Use `cask 'foo'` instead of `cask :v1 => 'foo'`",
+        severity: :convention,
+        line:     1,
+        column:   0,
+        source:   "cask :v1 => 'foo'",
+      }]
     end
 
-    context "with dsl version" do
-      let(:source) { "cask :v1 => 'foo' do; end" }
-      let(:correct_source) { "cask 'foo' do; end" }
-      let(:expected_offenses) do
-        [{
-          message:  "Use `cask 'foo'` instead of `cask :v1 => 'foo'`",
-          severity: :convention,
-          line:     1,
-          column:   0,
-          source:   "cask :v1 => 'foo'",
-        }]
-      end
+    include_examples "reports offenses"
 
-      include_examples "reports offenses"
-
-      include_examples "autocorrects source"
-    end
+    include_examples "autocorrects source"
   end
 end
diff --git a/Library/Homebrew/test/rubocops/formula_desc_spec.rb b/Library/Homebrew/test/rubocops/formula_desc_spec.rb
index 0b9f7dcb28..8f7ea8f806 100644
--- a/Library/Homebrew/test/rubocops/formula_desc_spec.rb
+++ b/Library/Homebrew/test/rubocops/formula_desc_spec.rb
@@ -15,7 +15,7 @@ describe RuboCop::Cop::FormulaAudit::Desc do
       RUBY
     end
 
-    it "reports an offense when desc is an empty string" do
+    it "When desc is an empty string" do
       expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
         class Foo < Formula
           url 'https://brew.sh/foo-1.0.tgz'
@@ -30,81 +30,30 @@ describe RuboCop::Cop::FormulaAudit::Desc do
         class Foo < Formula
           url 'https://brew.sh/foo-1.0.tgz'
           desc 'Bar#{"bar" * 29}'
-          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Description is too long. "name: desc" should be less than 80 characters. Length is calculated as foo + desc. (currently 95)
+          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Description is too long. "name: desc" should be less than 80 characters. The current combined length is 95.
         end
       RUBY
     end
 
-    it "When desc is multiline string" do
+    it "When desc is a multiline string" do
       expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
         class Foo < Formula
           url 'https://brew.sh/foo-1.0.tgz'
           desc 'Bar#{"bar" * 9}'\
             '#{"foo" * 21}'
-          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Description is too long. "name: desc" should be less than 80 characters. Length is calculated as foo + desc. (currently 98)
+          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Description is too long. "name: desc" should be less than 80 characters. The current combined length is 98.
         end
       RUBY
     end
   end
 
   context "When auditing formula desc" do
-    it "When wrong \"command-line\" usage in desc" do
-      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
-        class Foo < Formula
-          url 'https://brew.sh/foo-1.0.tgz'
-          desc 'command line'
-                ^ Description should start with a capital letter
-                ^^^^^^^^^^^^ Description should use \"command-line\" instead of \"command line\"
-        end
-      RUBY
-    end
-
-    it "When an article is used in desc" do
-      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
-        class Foo < Formula
-          url 'https://brew.sh/foo-1.0.tgz'
-          desc 'An aardvark'
-                ^^^ Description shouldn\'t start with an indefinite article, i.e. \"An\"
-        end
-      RUBY
-    end
-
-    it "When an lowercase letter starts a desc" do
-      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
-        class Foo < Formula
-          url 'https://brew.sh/foo-1.0.tgz'
-          desc 'bar'
-                ^ Description should start with a capital letter
-        end
-      RUBY
-    end
-
-    it "When formula name is in desc" do
-      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
-        class Foo < Formula
-          url 'https://brew.sh/foo-1.0.tgz'
-          desc 'Foo is a foobar'
-                ^^^^ Description shouldn\'t start with the formula name
-        end
-      RUBY
-    end
-
-    it "When the description ends with a full stop" do
-      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
-        class Foo < Formula
-          url 'https://brew.sh/foo-1.0.tgz'
-          desc 'Description with a full stop at the end.'
-                                                       ^ Description shouldn\'t end with a full stop
-        end
-      RUBY
-    end
-
     it "When the description starts with a leading space" do
       expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
         class Foo < Formula
           url 'https://brew.sh/foo-1.0.tgz'
           desc ' Description with a leading space'
-                ^ Description shouldn\'t have a leading space
+                ^ Description shouldn\'t have leading spaces.
         end
       RUBY
     end
@@ -114,7 +63,58 @@ describe RuboCop::Cop::FormulaAudit::Desc do
         class Foo < Formula
           url 'https://brew.sh/foo-1.0.tgz'
           desc 'Description with a trailing space '
-                                                 ^ Description shouldn\'t have a trailing space
+                                                 ^ Description shouldn\'t have trailing spaces.
+        end
+      RUBY
+    end
+
+    it "When \"command-line\" is incorrectly spelled in the desc" do
+      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
+        class Foo < Formula
+          url 'https://brew.sh/foo-1.0.tgz'
+          desc 'command line'
+                ^ Description should start with a capital letter.
+                ^^^^^^^^^^^^ Description should use \"command-line\" instead of \"command line\".
+        end
+      RUBY
+    end
+
+    it "When an article is used in the desc" do
+      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
+        class Foo < Formula
+          url 'https://brew.sh/foo-1.0.tgz'
+          desc 'An aardvark'
+                ^^ Description shouldn\'t start with an indefinite article, i.e. \"An\".
+        end
+      RUBY
+    end
+
+    it "When the desc starts with a lowercase letter" do
+      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
+        class Foo < Formula
+          url 'https://brew.sh/foo-1.0.tgz'
+          desc 'bar'
+                ^ Description should start with a capital letter.
+        end
+      RUBY
+    end
+
+    it "When the desc starts with the formula name" do
+      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
+        class Foo < Formula
+          url 'https://brew.sh/foo-1.0.tgz'
+          desc 'Foo is a foobar'
+                ^^^^ Description shouldn\'t start with the formula name.
+        end
+      RUBY
+    end
+
+    it "When the description ends with a full stop" do
+      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
+        class Foo < Formula
+          url 'https://brew.sh/foo-1.0.tgz'
+          desc 'Description with a full stop at the end.'
+                                                       ^ Description shouldn\'t end with a full stop.
         end
       RUBY
     end
@@ -130,7 +130,7 @@ describe RuboCop::Cop::FormulaAudit::Desc do
       correct_source = <<~RUBY
         class Foo < Formula
           url 'https://brew.sh/foo-1.0.tgz'
-          desc 'an bar: command-line'
+          desc 'Bar: command-line'
         end
       RUBY