diff --git a/features/valid_ruby.feature b/features/valid_ruby.feature
index 3a5e607..4b8e8df 100644
--- a/features/valid_ruby.feature
+++ b/features/valid_ruby.feature
@@ -7,7 +7,7 @@ Feature: Valid Ruby
     Given a file named "extra_end.rb" with:
     """
     def a_method
-      puts "stuff"
+      puts 'stuff'
     end
     end
 
diff --git a/lib/tailor/cli/options.rb b/lib/tailor/cli/options.rb
index 9edd916..eef27b4 100644
--- a/lib/tailor/cli/options.rb
+++ b/lib/tailor/cli/options.rb
@@ -75,6 +75,12 @@ def self.parse!(args)
             options.style[:allow_trailing_line_spaces] = c
           end
 
+          opt.on('--allow-unnecessary-double-quotes BOOL',
+            'Check for unnecessary use of double quotes?',
+            '(default: false)') do |c|
+            options.style[:allow_unnecessary_double_quotes] = c
+          end
+
           opt.on('--indentation-spaces NUMBER', INTEGER_OR_OFF,
             'Spaces to expect indentation.  (default: 2)') do |c|
             options.style[:indentation_spaces] = c
diff --git a/lib/tailor/configuration/style.rb b/lib/tailor/configuration/style.rb
index 873fcbb..ad3eed0 100644
--- a/lib/tailor/configuration/style.rb
+++ b/lib/tailor/configuration/style.rb
@@ -29,6 +29,7 @@ def self.define_property(name)
       define_property :allow_hard_tabs
       define_property :allow_screaming_snake_case_classes
       define_property :allow_trailing_line_spaces
+      define_property :allow_unnecessary_double_quotes
       define_property :allow_invalid_ruby
       define_property :indentation_spaces
       define_property :max_code_lines_in_class
@@ -53,6 +54,7 @@ def initialize
         allow_hard_tabs(false, level: :error)
         allow_screaming_snake_case_classes(false, level: :error)
         allow_trailing_line_spaces(false, level: :error)
+        allow_unnecessary_double_quotes(false, level: :warn)
         allow_invalid_ruby(false, level: :warn)
         indentation_spaces(2, level: :error)
         max_code_lines_in_class(300, level: :error)
diff --git a/lib/tailor/rulers/allow_unnecessary_double_quotes_ruler.rb b/lib/tailor/rulers/allow_unnecessary_double_quotes_ruler.rb
new file mode 100644
index 0000000..fd0b0c8
--- /dev/null
+++ b/lib/tailor/rulers/allow_unnecessary_double_quotes_ruler.rb
@@ -0,0 +1,63 @@
+require_relative '../ruler'
+
+class Tailor
+  module Rulers
+    class AllowUnnecessaryDoubleQuotesRuler < Tailor::Ruler
+
+      def initialize(config, options)
+        super(config, options)
+        add_lexer_observers :nl
+      end
+
+      def nl_update(lexed_line, lineno, column)
+        quotes(lexed_line).each do |quote|
+          unless contains_embedded_expression?(quote) ||
+            contains_escape_sequence?(quote)
+            measure(lineno, column(quote.first))
+          end
+        end
+      end
+
+      # Checks to see if the double_quotes are unnecessary.
+      #
+      # @param [Fixnum] lineno Line the problem was found on.
+      # @param [Fixnum] column Column the problem was found on.
+      def measure(lineno, column)
+        @problems << Problem.new('unnecessary_double_quotes', lineno, column,
+          "Unnecessary double quotes at column #{column}, " +
+            'expected single quotes.', @options[:level])
+      end
+
+      private
+
+      def contains_embedded_expression?(tokens)
+        tokens.any? { |t| t[1] == :on_embexpr_beg }
+      end
+
+      def contains_escape_sequence?(tokens)
+        tokens.any? do |t|
+          t[1] == :on_tstring_content and t[2].match(/\\[a-z]+/)
+        end
+      end
+
+      def quotes(tokens)
+        tokens.select do |t|
+          true if (double_quote_start?(t))..(double_quote_end?(t))
+        end.slice_before { |t| double_quote_start?(t) }.reject { |q| q.empty? }
+      end
+
+      def column(token)
+        token[0][1]
+      end
+
+      def double_quote_start?(token)
+        token[1] == :on_tstring_beg and token[2] == '"'
+      end
+
+      def double_quote_end?(token)
+        token[1] == :on_tstring_end and token[2] == '"'
+      end
+
+    end
+  end
+end
diff --git a/spec/functional/horizontal_spacing/hard_tabs_spec.rb b/spec/functional/horizontal_spacing/hard_tabs_spec.rb
index 2b80347..40347fa 100644
--- a/spec/functional/horizontal_spacing/hard_tabs_spec.rb
+++ b/spec/functional/horizontal_spacing/hard_tabs_spec.rb
@@ -9,13 +9,13 @@
 
 HARD_TABS['hard_tab'] =
   %Q{def something
-\tputs "something"
+\tputs 'something'
 end}
 
 HARD_TABS['hard_tab_with_spaces'] =
   %Q{class Thing
   def something
-\t  puts "something"
+\t  puts 'something'
   end
 end}
 
@@ -27,14 +27,14 @@ def something
 HARD_TABS['hard_tab_with_1_indented_space'] =
   %Q{class Thing
   def something
-\t   puts "something"
+\t   puts 'something'
   end
 end}
 
 HARD_TABS['hard_tab_with_2_indented_spaces'] =
   %Q{class Thing
   def something
-\t    puts "something"
+\t    puts 'something'
   end
 end}
 
diff --git a/spec/functional/string_quoting_spec.rb b/spec/functional/string_quoting_spec.rb
new file mode 100644
index 0000000..ccaee46
--- /dev/null
+++ b/spec/functional/string_quoting_spec.rb
@@ -0,0 +1,97 @@
+require 'spec_helper'
+require_relative '../support/string_quoting_cases'
+require 'tailor/critic'
+require 'tailor/configuration/style'
+
+describe 'String Quoting' do
+
+  def file_name
+    self.class.description
+  end
+
+  def contents
+    QUOTING[file_name] || begin
+      raise "Example not found: #{file_name}"
+    end
+  end
+
+  before do
+    Tailor::Logger.stub(:log)
+    FakeFS.activate!
+    FileUtils.touch file_name
+    File.open(file_name, 'w') { |f| f.write contents }
+  end
+
+  let(:critic) { Tailor::Critic.new }
+
+  let(:style) do
+    style = Tailor::Configuration::Style.new
+    style.trailing_newlines 0, level: :off
+    style.allow_invalid_ruby true, level: :off
+    style
+  end
+
+  context :single_quotes_no_interpolation do
+    it 'does not warn' do
+      critic.check_file(file_name, style.to_hash)
+      expect(critic.problems[file_name]).to be_empty
+    end
+  end
+
+  context :double_quotes_with_interpolation do
+    it 'does not warn' do
+      critic.check_file(file_name, style.to_hash)
+      expect(critic.problems[file_name]).to be_empty
+    end
+  end
+
+  context :double_quotes_no_interpolation do
+    it 'warns that double quotes are unnecessary' do
+      critic.check_file(file_name, style.to_hash)
+      expect(critic.problems[file_name]).to eql [{
+        :type => 'unnecessary_double_quotes',
+        :line => 1,
+        :column => 6,
+        :message => 'Unnecessary double quotes at column 6, expected single quotes.',
+        :level => :warn
+      }]
+    end
+  end
+
+  context :double_quotes_no_interpolation_twice do
+    it 'warns that double quotes are unnecessary' do
+      critic.check_file(file_name, style.to_hash)
+      expect(critic.problems[file_name]).to eql [
+        {
+          :type => 'unnecessary_double_quotes',
+          :line => 1,
+          :column => 6,
+          :message => 'Unnecessary double quotes at column 6, expected single quotes.',
+          :level => :warn
+        },
+        {
+          :type => 'unnecessary_double_quotes',
+          :line => 1,
+          :column => 14,
+          :message => 'Unnecessary double quotes at column 14, expected single quotes.',
+          :level => :warn
+        }
+      ]
+    end
+  end
+
+  context :nested_quotes do
+    it 'does not warn' do
+      critic.check_file(file_name, style.to_hash)
+      expect(critic.problems[file_name]).to be_empty
+    end
+  end
+
+  context :escape_sequence do
+    it 'does not warn when a double quoted string contains a newline' do
+      critic.check_file(file_name, style.to_hash)
+      expect(critic.problems[file_name]).to be_empty
+    end
+  end
+
+end
diff --git a/spec/functional/vertical_spacing/class_length_spec.rb b/spec/functional/vertical_spacing/class_length_spec.rb
index 6fc6204..964cfa8 100644
--- a/spec/functional/vertical_spacing/class_length_spec.rb
+++ b/spec/functional/vertical_spacing/class_length_spec.rb
@@ -10,7 +10,7 @@
   include Pizza
 
   def barrel_roll
-    puts "DOABARRELROLL!"
+    puts 'DOABARRELROLL!'
   end
 end}
 
diff --git a/spec/support/bad_indentation_cases.rb b/spec/support/bad_indentation_cases.rb
index 8681e80..efb7cfa 100644
--- a/spec/support/bad_indentation_cases.rb
+++ b/spec/support/bad_indentation_cases.rb
@@ -28,20 +28,20 @@
 
 INDENT_1['def_content_indented_end'] =
   %Q{def a
-  puts "stuff"
+  puts 'stuff'
  end}
 
 INDENT_1['class_def_content_outdented_end'] =
   %Q{class A
   def a
-    puts "stuff"
+    puts 'stuff'
  end
 end}
 
 INDENT_1['class_def_outdented_content'] =
   %Q{class A
   def a
-   puts "stuff"
+   puts 'stuff'
   end
 end}
 
@@ -56,9 +56,9 @@ def self.my_method
   %Q{def my_method
    case true
   when true
-    puts "stuff"
+    puts 'stuff'
   when false
-    puts "blah blah"
+    puts 'blah blah'
   end
 end}
 
@@ -66,9 +66,9 @@ def self.my_method
   %Q{def my_method
    case true        # comment
   when true
-    puts "stuff"
+    puts 'stuff'
   when false
-    puts "blah blah"
+    puts 'blah blah'
   end
 end}
 
@@ -76,9 +76,9 @@ def self.my_method
   %Q{def my_method
  case true
   when true
-    puts "stuff"
+    puts 'stuff'
   when false
-    puts "blah blah"
+    puts 'blah blah'
   end
 end}
 
@@ -86,9 +86,9 @@ def self.my_method
   %Q{def my_method
   case true
    when true
-    puts "stuff"
+    puts 'stuff'
   when false
-    puts "blah blah"
+    puts 'blah blah'
   end
 end}
 
@@ -96,9 +96,9 @@ def self.my_method
   %Q{def my_method
   case true
  when true
-    puts "stuff"
+    puts 'stuff'
   when false
-    puts "blah blah"
+    puts 'blah blah'
   end
 end}
 
@@ -106,35 +106,35 @@ def self.my_method
   %Q{def my_method
    case true
     when true
-      puts "stuff"
+      puts 'stuff'
     when false
-      puts "blah blah"
+      puts 'blah blah'
   end
 end}
 
 INDENT_1['while_do_indented'] =
   %Q{ while true do
-  puts "something"
+  puts 'something'
 end}
 
 INDENT_1['while_do_outdented'] =
   %Q{def my_method
  while true do
-    puts "something"
+    puts 'something'
   end
 end}
 
 INDENT_1['while_do_content_outdented'] =
   %Q{def my_method
   while true do
-   puts "something"
+   puts 'something'
   end
 end}
 
 INDENT_1['while_do_content_indented'] =
   %Q{def my_method
   while true do
-     puts "something"
+     puts 'something'
   end
 end}
 
@@ -240,7 +240,7 @@ def self.my_method
  '/profiles/DVR5000/ssdp_notification.erb'}
 
 INDENT_1['multi_line_method_call_end_in'] =
-  %Q{def initialize(raw_response)
+  %q{def initialize(raw_response)
   if raw_response.nil? || raw_response.empty?
     raise RTSP::Error,
       "#{self.class} received nil string--this shouldn't happen."
diff --git a/spec/support/good_indentation_cases.rb b/spec/support/good_indentation_cases.rb
index e973b86..0720780 100644
--- a/spec/support/good_indentation_cases.rb
+++ b/spec/support/good_indentation_cases.rb
@@ -101,7 +101,7 @@ class MyError < RuntimeError; end
 INDENT_OK['assignment_twolevel_paren_multistatement'] =
   %Q{result = Integer(
   String.new(
-    "1"
+    '1'
   ).to_i,
   16
 )}
@@ -161,7 +161,7 @@ class MyError < RuntimeError; end
   %Q{def some_method
   do_something(one, two)
 rescue => e
-  log "It didn't work."
+  log 'It didn't work.'
   raise e
 end}
 
@@ -189,7 +189,7 @@ class MyError < RuntimeError; end
 INDENT_OK['nested_def'] =
   %Q{def first_method
   def second_method
-    puts "hi"
+    puts 'hi'
   end
 end}
 
@@ -233,12 +233,12 @@ class MyClass
   include Stuff
 
   def a_method
-    puts "hello"
+    puts 'hello'
   end
 end}
 
 INDENT_OK['if_modifier'] =
-  %Q{puts "hi" if nil.nil?}
+  %Q{puts 'hi' if nil.nil?}
 
 INDENT_OK['if_modifier2'] =
   %Q{start_key_registration_server if @profiles.values.include? :SM5000}
@@ -249,7 +249,7 @@ def a_method
 end}
 
 INDENT_OK['unless_modifier'] =
-  %Q{puts "hi" unless nil.nil?}
+  %Q{puts 'hi' unless nil.nil?}
 
 INDENT_OK['def_return_unless_modifier'] =
   %Q{def a_method
@@ -269,9 +269,9 @@ def a_method
   %Q{def my_method
   case true
   when true
-    puts "stuff"
+    puts 'stuff'
   when false
-    puts "blah blah"
+    puts 'blah blah'
   end
 end}
 
@@ -297,7 +297,7 @@ def a_method
 
 INDENT_OK['while_do_loop'] =
   %Q{while true do
-  puts "something"
+  puts 'something'
 end}
 
 INDENT_OK['while_do_loop2'] =
@@ -311,7 +311,7 @@ def a_method
 
 INDENT_OK['until_do_loop'] =
   %Q{until true do
-  puts "something"
+  puts 'something'
 end}
 
 INDENT_OK['until_do_loop2'] =
@@ -430,22 +430,22 @@ def a_method
 
 INDENT_OK['deep_hash_with_rockets'] =
   %Q[im_deep =
-  { "one" =>
-    { "1" =>
-      { "a" => "A",
-        "b" => "B",
-        "c" => "C" },
-      "2" =>
-      { "d" => "D",
-        "e" => "E",
-        "f" => "F" } } }]
+  { 'one' =>
+    { '1' =>
+      { 'a' => 'A',
+        'b' => 'B',
+        'c' => 'C' },
+      '2' =>
+      { 'd' => 'D',
+        'e' => 'E',
+        'f' => 'F' } } }]
 
 INDENT_OK['embedded_strings_in_embedded_strings'] =
   %q[def friendly_time(time)
   if hours < 24
     "#{(hours > 0) ? "#{hours} hour" : '' }#{(hours > 1) ? 's' : ''}" +
       " #{(mins > 0) ? "#{mins} minute" : '' }#{(mins > 1) ? 's' : ''}" +
-      " #{seconds} second#{(seconds > 1) ? "s" : ''} ago"
+      " #{seconds} second#{(seconds > 1) ? 's' : ''} ago"
   else
     time.to_s
   end
@@ -483,8 +483,8 @@ def a_method
 ]}
 
 INDENT_OK['multi_line_brackets_embedded_hashes'] =
-  %Q{summary_table.rows << [{ value: "File", align: :center },
-  { value: "Total Problems", align: :center }]}
+  %Q{summary_table.rows << [{ value: 'File', align: :center },
+  { value: 'Total Problems', align: :center }]}
 
 INDENT_OK['brackets_combo'] =
   %Q{[2]
@@ -634,7 +634,7 @@ def print_iteration_start iteration_number
   %Q{def your_thing(
   one
 )
-  puts "stuff"
+  puts 'stuff'
 end}
 
 #------------------------------------------------------------------------------
@@ -688,10 +688,10 @@ def print_iteration_start iteration_number
   baz
 }.each do |thing|
   function thing do
-    puts "stuff"
+    puts 'stuff'
   end end
 
-puts "post ends"}
+puts 'post ends'}
 
 =begin
 INDENT_OK['rparen_and_do_same_line'] =
@@ -706,8 +706,8 @@ def print_iteration_start iteration_number
 #-------------------------------------------------------------------------------
 INDENT_OK['single_line_begin_rescue_end'] =
   %Q{def log
-  l = begin; lineno; rescue; "<EOF>"; end
-  c = begin; column; rescue; "<EOF>"; end
+  l = begin; lineno; rescue; '<EOF>'; end
+  c = begin; column; rescue; '<EOF>'; end
   subclass_name = self.class.to_s.sub(/^Tailor::/, '')
   args.first.insert(0, "<\#{subclass_name}> \#{l}[\#{c}]: ")
   Tailor::Logger.log(*args)
@@ -737,7 +737,7 @@ def foo
 end}
 
 INDENT_OK['combo3'] =
-  %Q{def report_turducken(results, performance_results)
+  %q{def report_turducken(results, performance_results)
   stuffing[:log_files] = { "\#{File.basename @logger.log_file_location}" =>
     File.read(@logger.log_file_location).gsub(/(?<f><)(?<q>\\/)?(?<w>\\w)/,
       '\\k<f>!\\k<q>\\k<w>') }.merge remote_logs
@@ -747,7 +747,7 @@ def foo
       @config[:turducken_password])
     suite_result_url = Stuffer.stuff(stuffing)
   rescue Errno::ECONNREFUSED
-    @logger.error "Unable to connect to Turducken server!"
+    @logger.error 'Unable to connect to Turducken server!'
   end
 
   suite_result_url
diff --git a/spec/support/string_quoting_cases.rb b/spec/support/string_quoting_cases.rb
new file mode 100644
index 0000000..c71b0b4
--- /dev/null
+++ b/spec/support/string_quoting_cases.rb
@@ -0,0 +1,25 @@
+QUOTING = {}
+
+QUOTING['single_quotes_no_interpolation'] =
+  %q{foo = 'bar'
+}
+
+QUOTING['double_quotes_with_interpolation'] =
+  %q{foo = "bar#{baz}"
+}
+
+QUOTING['double_quotes_no_interpolation'] =
+  %q{foo = "bar"
+}
+
+QUOTING['double_quotes_no_interpolation_twice'] =
+  %q{foo = "bar" + "baz"
+}
+
+QUOTING['escape_sequence'] =
+  %q{foo = "bar\n"
+}
+
+QUOTING['nested_quotes'] =
+  %q{foo = "foo#{bar('baz')}"
+}
diff --git a/spec/unit/tailor/configuration/style_spec.rb b/spec/unit/tailor/configuration/style_spec.rb
index 1f49c24..022ffc1 100644
--- a/spec/unit/tailor/configuration/style_spec.rb
+++ b/spec/unit/tailor/configuration/style_spec.rb
@@ -161,6 +161,7 @@
         :allow_screaming_snake_case_classes => [false, { :level => :error }],
         :allow_trailing_line_spaces => [false, { :level => :error }],
         :allow_invalid_ruby => [false, { :level => :warn }],
+        :allow_unnecessary_double_quotes => [false, { :level => :warn }],
         :indentation_spaces => [2, { :level => :error }],
         :max_code_lines_in_class => [300, { :level => :error }],
         :max_code_lines_in_method => [30, { :level => :error }],
diff --git a/spec/unit/tailor/configuration_spec.rb b/spec/unit/tailor/configuration_spec.rb
index 3cffc9e..45c23bd 100644
--- a/spec/unit/tailor/configuration_spec.rb
+++ b/spec/unit/tailor/configuration_spec.rb
@@ -44,6 +44,7 @@
             allow_screaming_snake_case_classes: [false, { level: :error }],
             allow_trailing_line_spaces: [false, { level: :error }],
             allow_invalid_ruby: [false, { level: :warn }],
+            allow_unnecessary_double_quotes: [false, { :level => :warn }],
             indentation_spaces: [2, { level: :error }],
             max_code_lines_in_class: [300, { level: :error }],
             max_code_lines_in_method: [30, { level: :error }],