diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index d11d0b8..4386a33 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,8 +1,8 @@
 # frozen_string_literal: true
 
 if ENV["COVERAGE"] == "true"
-  require 'simplecov'
-  require 'coveralls'
+  require "simplecov"
+  require "coveralls"
 
   SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter.new([
     SimpleCov::Formatter::HTMLFormatter,
@@ -10,13 +10,13 @@
   ])
 
   SimpleCov.start do
-    command_name 'spec'
-    add_filter 'spec'
+    command_name "spec"
+    add_filter "spec"
   end
 end
 
-require 'tty-spinner'
-require 'stringio'
+require "tty-spinner"
+require "stringio"
 
 class StringIO
   def tty?
@@ -41,7 +41,7 @@ def tty?
   config.warnings = true
 
   if config.files_to_run.one?
-    config.default_formatter = 'doc'
+    config.default_formatter = "doc"
   end
 
   config.profile_examples = 2
diff --git a/spec/unit/auto_spin_spec.rb b/spec/unit/auto_spin_spec.rb
index a21ffe0..b4715f4 100644
--- a/spec/unit/auto_spin_spec.rb
+++ b/spec/unit/auto_spin_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#auto_spin' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#auto_spin" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "starts and auto spins" do
     spinner = TTY::Spinner.new(output: output, interval: 100)
@@ -18,7 +16,7 @@
     spinner = TTY::Spinner.new(output: output, hide_cursor: true)
 
     spinner.auto_spin {
-      raise 'boom'
+      raise "boom"
     }
 
     output.rewind
diff --git a/spec/unit/clear_spec.rb b/spec/unit/clear_spec.rb
index e333b50..95a1115 100644
--- a/spec/unit/clear_spec.rb
+++ b/spec/unit/clear_spec.rb
@@ -1,12 +1,10 @@
-# encoding: utf-8
-
-RSpec.describe TTY::Spinner, ':clear' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, ":clear" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "clears output when done" do
     spinner = TTY::Spinner.new(clear: true, output: output)
     3.times { spinner.spin }
-    spinner.stop('Done!')
+    spinner.stop("Done!")
     output.rewind
     expect(output.read).to eq([
       "\e[1G|",
diff --git a/spec/unit/error_spec.rb b/spec/unit/error_spec.rb
index 2997bbf..4c5ac8c 100644
--- a/spec/unit/error_spec.rb
+++ b/spec/unit/error_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#error' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#error" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "marks spinner as error" do
     spinner = TTY::Spinner.new(output: output)
@@ -22,7 +20,7 @@
   it "marks spinner as error with message" do
     spinner = TTY::Spinner.new(output: output)
     3.times { spinner.spin }
-    spinner.error('Error')
+    spinner.error("Error")
     output.rewind
     expect(output.read).to eq([
       "\e[1G|",
@@ -36,8 +34,8 @@
   end
 
   it "changes error spinner marker" do
-    spinner = TTY::Spinner.new(error_mark: 'x', output: output)
-    spinner.error('(error)')
+    spinner = TTY::Spinner.new(error_mark: "x", output: output)
+    spinner.error("(error)")
     output.rewind
     expect(output.read).to eq("\e[0m\e[2K\e[1Gx (error)\n")
 
diff --git a/spec/unit/events_spec.rb b/spec/unit/events_spec.rb
index 8ad4773..754c161 100644
--- a/spec/unit/events_spec.rb
+++ b/spec/unit/events_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, 'events' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "events" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "emits :done event" do
     events = []
@@ -21,7 +19,7 @@
 
     spinner.success
 
-    expect(events).to match_array([:done, :success])
+    expect(events).to match_array(%i[done success])
   end
 
   it "emits :error event" do
@@ -32,6 +30,6 @@
 
     spinner.error
 
-    expect(events).to match_array([:done, :error])
+    expect(events).to match_array(%i[done error])
   end
 end
diff --git a/spec/unit/frames_spec.rb b/spec/unit/frames_spec.rb
index e90021e..d1a736b 100644
--- a/spec/unit/frames_spec.rb
+++ b/spec/unit/frames_spec.rb
@@ -1,7 +1,5 @@
-# encoding: utf-8
-
-RSpec.describe TTY::Spinner, ':frames' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, ":frames" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "uses custom frames from string" do
     frames = ".o0@*"
diff --git a/spec/unit/hide_cursor_spec.rb b/spec/unit/hide_cursor_spec.rb
index fbb3947..9b681c4 100644
--- a/spec/unit/hide_cursor_spec.rb
+++ b/spec/unit/hide_cursor_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, ':hide_cursor' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, ":hide_cursor" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "hides cursor" do
     spinner = TTY::Spinner.new(output: output, hide_cursor: true)
@@ -22,7 +20,7 @@
   it "restores cursor on success" do
     spinner = TTY::Spinner.new(output: output, hide_cursor: true)
     4.times { spinner.spin }
-    spinner.success('success')
+    spinner.success("success")
     output.rewind
     expect(output.read).to eq([
       "\e[?25l\e[1G|",
@@ -38,7 +36,7 @@
   it "restores cursor on error" do
     spinner = TTY::Spinner.new(output: output, hide_cursor: true)
     4.times { spinner.spin }
-    spinner.error('error')
+    spinner.error("error")
     output.rewind
     expect(output.read).to eq([
       "\e[?25l\e[1G|",
diff --git a/spec/unit/job_spec.rb b/spec/unit/job_spec.rb
index 1cc9e09..5cf1418 100644
--- a/spec/unit/job_spec.rb
+++ b/spec/unit/job_spec.rb
@@ -1,6 +1,4 @@
-# encoding: utf-8
-
-RSpec.describe TTY::Spinner, '#job' do
+RSpec.describe TTY::Spinner, "#job" do
   it "adds and executes job" do
     spinner = TTY::Spinner.new("[:spinner] :title")
     called = []
diff --git a/spec/unit/join_spec.rb b/spec/unit/join_spec.rb
index d05e5bf..1b7258d 100644
--- a/spec/unit/join_spec.rb
+++ b/spec/unit/join_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#join' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#join" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "raises exception when not spinning" do
     spinner = TTY::Spinner.new(output: output)
diff --git a/spec/unit/log_spec.rb b/spec/unit/log_spec.rb
index eaab083..250e2b8 100644
--- a/spec/unit/log_spec.rb
+++ b/spec/unit/log_spec.rb
@@ -1,5 +1,5 @@
 RSpec.describe TTY::Spinner, "#log" do
-  let(:output) { StringIO.new('', 'w+') }
+  let(:output) { StringIO.new("", "w+") }
 
   it "logs a message above a spinner" do
     spinner = TTY::Spinner.new(output: output)
@@ -18,7 +18,7 @@
       "\e[2K\e[1Gfoo\n",
       "\e[2K\e[1Gbar\n",
       "\e[1G/",
-      "\e[1G/",
+      "\e[1G/"
     ].join)
   end
 
@@ -37,7 +37,7 @@
       "\e[1G|",
       "\e[2K\e[1Gfoo\n",
       "\e[1G/",
-      "\e[1G/",
+      "\e[1G/"
     ].join)
   end
 
diff --git a/spec/unit/multi/auto_spin_spec.rb b/spec/unit/multi/auto_spin_spec.rb
index 54a598b..b724d14 100644
--- a/spec/unit/multi/auto_spin_spec.rb
+++ b/spec/unit/multi/auto_spin_spec.rb
@@ -1,7 +1,5 @@
-# encoding: utf-8
-
-RSpec.describe TTY::Spinner::Multi, '#auto_spin' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner::Multi, "#auto_spin" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "doesn't auto spin top level spinner" do
     spinners = TTY::Spinner::Multi.new("Top level spinner", output: output)
@@ -24,11 +22,11 @@
     spinners = TTY::Spinner::Multi.new("top", output: output)
     jobs = []
 
-    spinners.register("one") { |sp| jobs << 'one'; sp.success }
-    spinners.register("two") { |sp| jobs << 'two'; sp.success }
+    spinners.register("one") { |sp| jobs << "one"; sp.success }
+    spinners.register("two") { |sp| jobs << "two"; sp.success }
 
     spinners.auto_spin
 
-    expect(jobs).to match_array(['one', 'two'])
+    expect(jobs).to match_array(%w[one two])
   end
 end
diff --git a/spec/unit/multi/error_spec.rb b/spec/unit/multi/error_spec.rb
index 9a6e29c..fd16f1d 100644
--- a/spec/unit/multi/error_spec.rb
+++ b/spec/unit/multi/error_spec.rb
@@ -1,9 +1,7 @@
-# encoding: utf-8
+RSpec.describe TTY::Spinner::Multi, "#error" do
+  let(:output) { StringIO.new("", "w+") }
 
-RSpec.describe TTY::Spinner::Multi, '#error' do
-  let(:output) { StringIO.new('', 'w+') }
-
-  it 'stops registerd multi spinner and emits an :error message' do
+  it "stops registerd multi spinner and emits an :error message" do
     spinners = TTY::Spinner::Multi.new(":spinner", output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -20,10 +18,10 @@
 
     expect(sp1.error?).to eq(true)
     expect(sp2.error?).to eq(true)
-    expect(callbacks).to match_array([:done, :error])
+    expect(callbacks).to match_array(%i[done error])
   end
 
-  it 'stops unregistered top level spinner and emits an :error message' do
+  it "stops unregistered top level spinner and emits an :error message" do
     spinners = TTY::Spinner::Multi.new(output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -40,10 +38,10 @@
 
     expect(sp1.error?).to eq(true)
     expect(sp2.error?).to eq(true)
-    expect(callbacks).to match_array([:done, :error])
+    expect(callbacks).to match_array(%i[done error])
   end
 
-  it 'stops registed spinners under top level and emits an error message' do
+  it "stops registed spinners under top level and emits an error message" do
     spinners = TTY::Spinner::Multi.new(":spinner", output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -60,10 +58,10 @@
     sp2.error
 
     expect(spinners.error?).to eq(true)
-    expect(callbacks).to match_array([:done, :error])
+    expect(callbacks).to match_array(%i[done error])
   end
 
-  it 'stops registed spinners under top level and emits an error message' do
+  it "stops registed spinners under top level and emits an error message" do
     spinners = TTY::Spinner::Multi.new(output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -80,10 +78,10 @@
     sp2.error
 
     expect(spinners.error?).to eq(true)
-    expect(callbacks).to match_array([:done, :error])
+    expect(callbacks).to match_array(%i[done error])
   end
 
-  it 'returns true when any spinner failed' do
+  it "returns true when any spinner failed" do
     spinners = TTY::Spinner::Multi.new(output: output)
     sp1 = spinners.register("one")
     sp2 = spinners.register("two")
diff --git a/spec/unit/multi/line_inset_spec.rb b/spec/unit/multi/line_inset_spec.rb
index 3500d77..e0d420f 100644
--- a/spec/unit/multi/line_inset_spec.rb
+++ b/spec/unit/multi/line_inset_spec.rb
@@ -1,14 +1,12 @@
-# encoding: utf-8
-
-RSpec.describe TTY::Spinner::Multi, '#line_inset' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner::Multi, "#line_inset" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "doesn't create inset when no top level spinner" do
     spinners = TTY::Spinner::Multi.new(output: output)
 
-    spinner = spinners.register 'example'
+    spinner = spinners.register "example"
 
-    expect(spinners.line_inset(spinner)).to eq('')
+    expect(spinners.line_inset(spinner)).to eq("")
   end
 
   it "defaults to the empty string for the top level spinner" do
@@ -21,8 +19,8 @@
   it "returns four spaces when there is a top level spinner" do
     spinners = TTY::Spinner::Multi.new("Top level spinner", output: output)
 
-    spinners.register 'middle'
-    spinners.register 'bottom'
+    spinners.register "middle"
+    spinners.register "bottom"
 
     expect(spinners.line_inset(2))
       .to eq(TTY::Spinner::Multi::DEFAULT_INSET[:middle])
@@ -31,8 +29,8 @@
   it "decorates last spinner" do
     spinners = TTY::Spinner::Multi.new("Top spinner", output: output)
 
-    spinners.register 'middle'
-    spinners.register 'bottom'
+    spinners.register "middle"
+    spinners.register "bottom"
 
     expect(spinners.line_inset(3))
       .to eq(TTY::Spinner::Multi::DEFAULT_INSET[:bottom])
@@ -45,7 +43,7 @@
         style: {
           top: ". ",
           middle: "--",
-          bottom: "---",
+          bottom: "---"
         }
       }
     spinners = TTY::Spinner::Multi.new("Top level spinner", opts)
diff --git a/spec/unit/multi/on_spec.rb b/spec/unit/multi/on_spec.rb
index 8777caf..51c444f 100644
--- a/spec/unit/multi/on_spec.rb
+++ b/spec/unit/multi/on_spec.rb
@@ -1,13 +1,11 @@
-# encoding: utf-8
+RSpec.describe TTY::Spinner::Multi, "#on" do
+  let(:output) { StringIO.new("", "w+") }
 
-RSpec.describe TTY::Spinner::Multi, '#on' do
-  let(:output) { StringIO.new('', 'w+') }
-
-  it 'fails to register a callback with invalid event name' do
+  it "fails to register a callback with invalid event name" do
     spinners = TTY::Spinner::Multi.new(output: output)
 
     expect {
-      spinners.on(:unknown_event) { }
+      spinners.on(:unknown_event) { :noop }
     }.to raise_error(ArgumentError, /The event unknown_event does not exist/)
   end
 end
diff --git a/spec/unit/multi/register_spec.rb b/spec/unit/multi/register_spec.rb
index f07dffd..f5171dd 100644
--- a/spec/unit/multi/register_spec.rb
+++ b/spec/unit/multi/register_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner::Multi, '#register' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner::Multi, "#register" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "registers a TTY::Spinner instance from a pattern" do
     spinners = TTY::Spinner::Multi.new(output: output, interval: 100)
@@ -27,8 +25,8 @@
   it "raises an erro when given neither a string or spinner instance" do
     spinners = TTY::Spinner::Multi.new(output: output, interval: 100)
 
-    expect { spinners.register [] }.
-      to raise_error(
+    expect { spinners.register [] }
+      .to raise_error(
         ArgumentError,
         "Expected a pattern or spinner, got: Array"
       )
@@ -42,6 +40,7 @@
 
     spinners.register "[:spinner]"
 
-    expect(TTY::Spinner).to have_received(:new).with("[:spinner]", {interval: 100, output: output})
+    expect(TTY::Spinner).to have_received(:new)
+      .with("[:spinner]", {interval: 100, output: output})
   end
 end
diff --git a/spec/unit/multi/spin_spec.rb b/spec/unit/multi/spin_spec.rb
index b25b0a9..f709c6a 100644
--- a/spec/unit/multi/spin_spec.rb
+++ b/spec/unit/multi/spin_spec.rb
@@ -1,7 +1,5 @@
-# encoding: utf-8
-
-RSpec.describe TTY::Spinner::Multi, '#spin' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner::Multi, "#spin" do
+  let(:output) { StringIO.new("", "w+") }
   let(:save)    { TTY::Cursor.save }
   let(:restore) { TTY::Cursor.restore }
   let(:top) { TTY::Spinner::Multi::DEFAULT_INSET[:top] }
diff --git a/spec/unit/multi/stop_spec.rb b/spec/unit/multi/stop_spec.rb
index 8d6f084..ce83ebc 100644
--- a/spec/unit/multi/stop_spec.rb
+++ b/spec/unit/multi/stop_spec.rb
@@ -1,9 +1,7 @@
-# encoding: utf-8
+RSpec.describe TTY::Spinner::Multi, "#stop" do
+  let(:output) { StringIO.new("", "w+") }
 
-RSpec.describe TTY::Spinner::Multi, '#stop' do
-  let(:output) { StringIO.new('', 'w+') }
-
-  it 'stops unregisterd multi spinner and emits a :done message' do
+  it "stops unregisterd multi spinner and emits a :done message" do
     spinners = TTY::Spinner::Multi.new(output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -23,7 +21,7 @@
     expect(callbacks).to eq([:done])
   end
 
-  it 'stops registerd multi spinner and emits a :done message' do
+  it "stops registerd multi spinner and emits a :done message" do
     spinners = TTY::Spinner::Multi.new(":spinner", output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -43,7 +41,7 @@
     expect(callbacks).to eq([:done])
   end
 
-  it 'stops all registered spinners and emits a :done message' do
+  it "stops all registered spinners and emits a :done message" do
     spinners = TTY::Spinner::Multi.new(output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -63,7 +61,7 @@
     expect(callbacks).to eq([:done])
   end
 
-  it 'stops all registered spinners under multispinner and emits a :done message' do
+  it "stops all registered spinners under multispinner and emits a :done message" do
     spinners = TTY::Spinner::Multi.new(":spinner", output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -83,7 +81,7 @@
     expect(callbacks).to eq([:done])
   end
 
-  it 'returns true when spinner is done' do
+  it "returns true when spinner is done" do
     spinners = TTY::Spinner::Multi.new(output: output)
 
     sp1 = spinners.register "[:spinner] one"
diff --git a/spec/unit/multi/success_spec.rb b/spec/unit/multi/success_spec.rb
index 69175e9..cabf7a6 100644
--- a/spec/unit/multi/success_spec.rb
+++ b/spec/unit/multi/success_spec.rb
@@ -1,9 +1,7 @@
-# encoding: utf-8
+RSpec.describe TTY::Spinner::Multi, "#success" do
+  let(:output) { StringIO.new("", "w+") }
 
-RSpec.describe TTY::Spinner::Multi, '#success' do
-  let(:output) { StringIO.new('', 'w+') }
-
-  it 'stops registerd multi spinner and emits a :success message' do
+  it "stops registerd multi spinner and emits a :success message" do
     spinners = TTY::Spinner::Multi.new(":spinner", output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -20,10 +18,10 @@
 
     expect(sp1.success?).to eq(true)
     expect(sp2.success?).to eq(true)
-    expect(callbacks).to match_array([:success, :done])
+    expect(callbacks).to match_array(%i[success done])
   end
 
-  it 'stops unregistered multi spinner and emits a :success message' do
+  it "stops unregistered multi spinner and emits a :success message" do
     spinners = TTY::Spinner::Multi.new(output: output)
     callbacks = []
     sp1 = spinners.register "[:spinner] one"
@@ -40,7 +38,7 @@
 
     expect(sp1.success?).to eq(true)
     expect(sp2.success?).to eq(true)
-    expect(callbacks).to match_array([:success, :done])
+    expect(callbacks).to match_array(%i[success done])
   end
 
   it "stops all registered spinners under top level and emits a :success message" do
@@ -60,7 +58,7 @@
     sp2.success
 
     expect(spinners.success?).to eq(true)
-    expect(callbacks).to match_array([:success, :done])
+    expect(callbacks).to match_array(%i[success done])
   end
 
   it "stops all registered spinners and emits a success message" do
@@ -80,10 +78,10 @@
     sp2.success
 
     expect(spinners.success?).to eq(true)
-    expect(callbacks).to match_array([:success, :done])
+    expect(callbacks).to match_array(%i[success done])
   end
 
-  it 'returns false when a spinner has errored' do
+  it "returns false when a spinner has errored" do
     spinners = TTY::Spinner::Multi.new(output: output)
 
     sp1 = spinners.register("")
diff --git a/spec/unit/new_spec.rb b/spec/unit/new_spec.rb
index 3fcd733..9173bf7 100644
--- a/spec/unit/new_spec.rb
+++ b/spec/unit/new_spec.rb
@@ -1,7 +1,6 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#new' do
+# frozen_string_literal: true
 
+RSpec.describe TTY::Spinner, "#new" do
   it "creates spinner with default format" do
     spinner = TTY::Spinner.new
     expect(spinner.format).to eq(:classic)
@@ -9,7 +8,7 @@
 
   it "doesn't accept unknown formatting tokens" do
     expect {
-     TTY::Spinner.new(format: :unknown)
+      TTY::Spinner.new(format: :unknown)
     }.to raise_error(ArgumentError, /Unknown format token `:unknown`/)
   end
 
diff --git a/spec/unit/pause_spec.rb b/spec/unit/pause_spec.rb
index c680fd9..4dba3e1 100644
--- a/spec/unit/pause_spec.rb
+++ b/spec/unit/pause_spec.rb
@@ -1,7 +1,5 @@
-# encoding: utf-8
-
-RSpec.describe TTY::Spinner, '#pause' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#pause" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "allows to pause auto spinning" do
     spinner = TTY::Spinner.new(output: output, interval: 100)
diff --git a/spec/unit/reset_spec.rb b/spec/unit/reset_spec.rb
index 3ae1671..a68e785 100644
--- a/spec/unit/reset_spec.rb
+++ b/spec/unit/reset_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#reset' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#reset" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "spins default frames" do
     spinner = TTY::Spinner.new(output: output)
diff --git a/spec/unit/run_spec.rb b/spec/unit/run_spec.rb
index 1fc9d53..70b9251 100644
--- a/spec/unit/run_spec.rb
+++ b/spec/unit/run_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#run' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#run" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "runs animation while executing block" do
     spinner = TTY::Spinner.new(output: output, interval: 100)
@@ -11,12 +9,12 @@
   end
 
   it "runs animation and executes block within context" do
-    context = spy('context')
+    context = spy("context")
     spinner = TTY::Spinner.new(":title", output: output)
 
     spinner.run("done") do
       context.call
-      spinner.update(title: 'executing')
+      spinner.update(title: "executing")
     end
 
     expect(context).to have_received(:call).once
diff --git a/spec/unit/spin_spec.rb b/spec/unit/spin_spec.rb
index ec20891..b3065db 100644
--- a/spec/unit/spin_spec.rb
+++ b/spec/unit/spin_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#spin' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#spin" do
+  let(:output) { StringIO.new("", "w+") }
   let(:save)    { TTY::Cursor.save }
   let(:restore) { TTY::Cursor.restore }
 
diff --git a/spec/unit/stop_spec.rb b/spec/unit/stop_spec.rb
index 564a804..5a029f1 100644
--- a/spec/unit/stop_spec.rb
+++ b/spec/unit/stop_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#stop' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#stop" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "doesn't reprint stop message" do
     spinner = TTY::Spinner.new(output: output)
@@ -11,7 +9,7 @@
     expect(output.read).to eq([
       "\e[1G|",
       "\e[0m\e[2K",
-      "\e[1G|\n",
+      "\e[1G|\n"
     ].join)
   end
 
@@ -34,7 +32,7 @@
     spinner = TTY::Spinner.new(output: output)
     5.times do |n|
       spinner.spin
-      spinner.stop('Done!') if n == 1
+      spinner.stop("Done!") if n == 1
     end
     output.rewind
     expect(output.read).to eq([
@@ -51,7 +49,7 @@
     spinner = TTY::Spinner.new("Loading ... :spinner", output: output)
     5.times do |n|
       spinner.spin
-      spinner.stop('Done!') if n == 1
+      spinner.stop("Done!") if n == 1
     end
     output.rewind
     expect(output.read).to eq([
diff --git a/spec/unit/success_spec.rb b/spec/unit/success_spec.rb
index d4caffc..2c727fb 100644
--- a/spec/unit/success_spec.rb
+++ b/spec/unit/success_spec.rb
@@ -1,7 +1,5 @@
-# coding: utf-8
-
-RSpec.describe TTY::Spinner, '#success' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#success" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "marks spinner as success" do
     spinner = TTY::Spinner.new(output: output)
@@ -22,7 +20,7 @@
   it "marks spinner as success with message" do
     spinner = TTY::Spinner.new(output: output)
     3.times { spinner.spin }
-    spinner.success('Successful')
+    spinner.success("Successful")
     output.rewind
     expect(output.read).to eq([
       "\e[1G|",
@@ -36,8 +34,8 @@
   end
 
   it "changes success spinner marker" do
-    spinner = TTY::Spinner.new(success_mark: '*', output: output)
-    spinner.success('(successful)')
+    spinner = TTY::Spinner.new(success_mark: "*", output: output)
+    spinner.success("(successful)")
     output.rewind
     expect(output.read).to eq("\e[0m\e[2K\e[1G* (successful)\n")
 
diff --git a/spec/unit/update_spec.rb b/spec/unit/update_spec.rb
index 78a8da6..e4b82c3 100644
--- a/spec/unit/update_spec.rb
+++ b/spec/unit/update_spec.rb
@@ -1,13 +1,11 @@
-# encoding: utf-8
-
-RSpec.describe TTY::Spinner, '#update' do
-  let(:output) { StringIO.new('', 'w+') }
+RSpec.describe TTY::Spinner, "#update" do
+  let(:output) { StringIO.new("", "w+") }
 
   it "updates message content with custom token" do
     spinner = TTY::Spinner.new(":title :spinner", output: output, interval: 100)
-    spinner.update(title: 'task')
+    spinner.update(title: "task")
     5.times { spinner.spin }
-    spinner.stop('done')
+    spinner.stop("done")
     output.rewind
     expect(output.read).to eq([
       "\e[1Gtask |",
@@ -23,11 +21,11 @@
   it "updates message many times before stopping" do
     spinner = TTY::Spinner.new(":title :spinner", output: output)
 
-    spinner.update(title: 'task_a')
+    spinner.update(title: "task_a")
     2.times { spinner.spin }
-    spinner.update(title: 'task_b')
+    spinner.update(title: "task_b")
     2.times { spinner.spin }
-    spinner.stop('done')
+    spinner.stop("done")
     output.rewind
 
     expect(output.read).to eq([
@@ -44,14 +42,14 @@
   it "updates message after stopping" do
     spinner = TTY::Spinner.new(":title :spinner", output: output)
 
-    spinner.update(title: 'task_a')
+    spinner.update(title: "task_a")
     2.times { spinner.spin }
-    spinner.stop('done')
+    spinner.stop("done")
 
     spinner.start
-    spinner.update(title: 'task_b')
+    spinner.update(title: "task_b")
     2.times { spinner.spin }
-    spinner.stop('done')
+    spinner.stop("done")
 
     output.rewind
     expect(output.read).to eq([
@@ -70,18 +68,18 @@
     spinner = TTY::Spinner.new(":foo :bar", output: output)
     expect(spinner.tokens).to eq({})
 
-    spinner.update(foo: 'FOO')
-    spinner.update(bar: 'BAR')
+    spinner.update(foo: "FOO")
+    spinner.update(bar: "BAR")
 
-    expect(spinner.tokens).to include({foo: 'FOO', bar: 'BAR'})
+    expect(spinner.tokens).to include({foo: "FOO", bar: "BAR"})
   end
 
   it "updates more than one token" do
     spinner = TTY::Spinner.new(":foo :bar", output: output)
     expect(spinner.tokens).to eq({})
 
-    spinner.update(foo: 'FOO', bar: 'BAR')
+    spinner.update(foo: "FOO", bar: "BAR")
 
-    expect(spinner.tokens).to include({foo: 'FOO', bar: 'BAR'})
+    expect(spinner.tokens).to include({foo: "FOO", bar: "BAR"})
   end
 end