diff --git a/.rubocop.yml b/.rubocop.yml
deleted file mode 100644
index 3b64504..0000000
--- a/.rubocop.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-AllCops:
-  NewCops: enable
diff --git a/Gemfile b/Gemfile
deleted file mode 100644
index 32e7af5..0000000
--- a/Gemfile
+++ /dev/null
@@ -1,5 +0,0 @@
-source "https://rubygems.org"
-
-group :development do
-  gem "rubocop", require: false
-end
diff --git a/Gemfile.lock b/Gemfile.lock
deleted file mode 100644
index 9c8fa34..0000000
--- a/Gemfile.lock
+++ /dev/null
@@ -1,60 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    ast (2.4.3)
-    json (3.0.2)
-    language_server-protocol (3.17.0.6)
-    lint_roller (1.1.0)
-    parallel (2.3.0)
-    parser (3.3.12.0)
-      ast (~> 2.4.1)
-      racc
-    prism (1.9.0)
-    racc (1.8.1)
-    rainbow (3.1.1)
-    regexp_parser (2.13.1)
-    rubocop (1.92.0)
-      json (>= 2.3)
-      language_server-protocol (~> 3.17.0.2)
-      lint_roller (~> 1.1.0)
-      parallel (>= 1.10)
-      parser (>= 3.3.0.2)
-      rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 2.11.3, < 3.0)
-      rubocop-ast (>= 1.49.0, < 2.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.50.0)
-      parser (>= 3.3.7.2)
-      prism (~> 1.7)
-    ruby-progressbar (1.13.0)
-    unicode-display_width (3.3.0)
-      unicode-emoji (~> 4.3)
-    unicode-emoji (4.3.0)
-
-PLATFORMS
-  ruby
-  x86_64-linux
-
-DEPENDENCIES
-  rubocop
-
-CHECKSUMS
-  ast (2.4.3) sha256=954615157c1d6a382bc27d690d973195e79db7f55e9765ac7c481c60bdb4d383
-  json (3.0.2) sha256=8e6d7e7b11384c21230430cef90b71f14849a34a1f4452796670f7c981bd19df
-  language_server-protocol (3.17.0.6) sha256=5ef2c0c138f8267e1bc631d3328347d354f96724b0af22f2c79516120443b7f0
-  lint_roller (1.1.0) sha256=2c0c845b632a7d172cb849cc90c1bce937a28c5c8ccccb50dfd46a485003cc87
-  parallel (2.3.0) sha256=f75a3e904101ce6a1ccb6b8dc800cbafd42166d83330192438dcf29395167a6f
-  parser (3.3.12.0) sha256=21a6d7f755d5a24dfbdc6e6b772e4e879a52e7631a88bc5a3a134606052c9828
-  prism (1.9.0) sha256=7b530c6a9f92c24300014919c9dcbc055bf4cdf51ec30aed099b06cd6674ef85
-  racc (1.8.1) sha256=4a7f6929691dbec8b5209a0b373bc2614882b55fc5d2e447a21aaa691303d62f
-  rainbow (3.1.1) sha256=039491aa3a89f42efa1d6dec2fc4e62ede96eb6acd95e52f1ad581182b79bc6a
-  regexp_parser (2.13.1) sha256=5aedb6b7c35688f51e86eef17a15374dfd287c83f4ca644b2c5f3ec50a33b44b
-  rubocop (1.92.0) sha256=2af68041fb2e70bd9321d0479b49fad07f8008a3d0758c83347b4917128c56e0
-  rubocop-ast (1.50.0) sha256=b9ca88300da0803ee222ad20cdb30494c0a784eed06fdc35d254b06d662788db
-  ruby-progressbar (1.13.0) sha256=80fc9c47a9b640d6834e0dc7b3c94c9df37f08cb072b7761e4a71e22cff29b33
-  unicode-display_width (3.3.0) sha256=4b7aa66a4b11db50f6f7e98411215cd0dd10eaecb665d36eec5bcacb3fa0b613
-  unicode-emoji (4.3.0) sha256=11c02fa73290378c066bb0562cd4c87d8e1b706fbbe0059ca12746a4244de8ce
-
-BUNDLED WITH
-  4.0.20
diff --git a/bin/ecarte b/bin/ecarte
index 7af7ee5..220bbe6 100755
--- a/bin/ecarte
+++ b/bin/ecarte
@@ -1,9 +1,9 @@
 #!/usr/bin/env ruby
 
-require_relative "../lib/game"
+require_relative '../lib/game'
 
 # Crée une partie.
-game = Game.new("Alice", "Bob")
+game = Game.new('Alice', 'Bob')
 
 game.determine_dealer
 game.deal
diff --git a/lib/card.rb b/lib/card.rb
index 4049fe2..fab450c 100644
--- a/lib/card.rb
+++ b/lib/card.rb
@@ -18,16 +18,15 @@ class Card
       @value.to_i
     else
       case @value
-      when "ace"
+      when 'ace'
         11
-      when "jack"
+      when 'jack'
         12
-      when "queen"
+      when 'queen'
         13
-      when "king"
+      when 'king'
         14
       end
     end
   end
 end
-
diff --git a/lib/deck.rb b/lib/deck.rb
index dbbffde..43fe484 100644
--- a/lib/deck.rb
+++ b/lib/deck.rb
@@ -1,4 +1,4 @@
-require_relative "card"
+require_relative 'card'
 
 # Représente un paquet de cartes et gère son contenu.
 class Deck
@@ -6,8 +6,8 @@ class Deck
 
   def initialize
     @cards = []
-    values = ["7", "8", "9", "10", "ace", "jack", "queen", "king"]
-    suits = ["hearts", "diamonds", "clubs", "spades"]
+    values = %w[7 8 9 10 ace jack queen king]
+    suits = %w[hearts diamonds clubs spades]
 
     suits.each do |suit|
       values.each do |value|
@@ -26,4 +26,3 @@ class Deck
     @cards.pop
   end
 end
-
diff --git a/lib/game.rb b/lib/game.rb
index 7a8280f..fd846d6 100644
--- a/lib/game.rb
+++ b/lib/game.rb
@@ -1,11 +1,11 @@
-require_relative "deck"
-require_relative "player"
-require_relative "terminal_ui"
+require_relative 'deck'
+require_relative 'player'
+require_relative 'terminal_ui'
 
 # Gère le déroulement et les règles d'une partie d'Écarté.
 class Game
   attr_reader :player1, :player2, :dealer, :non_dealer,
-              :upcard, :trump_suit, :trick_winner, :stock
+              :upcard, :trump_suit, :trick_winner
 
   def initialize(player_name1, player_name2)
     @deck = Deck.new
@@ -24,8 +24,8 @@ class Game
     @deck.shuffle
 
     while @dealer.nil?
-      card1 = @deck.cards[rand(2..30) - 1]
-      card2 = @deck.cards[rand(2..30) - 1]
+      card1 = @deck.cards[rand(1..29)]
+      card2 = @deck.cards[rand(1..29)]
 
       if card1.strength > card2.strength
         @dealer = @player1
@@ -73,12 +73,10 @@ class Game
       else
         follow_card.suit == lead_card.suit
       end
+    elsif follow_player.hand.any? { |card| card.suit == @trump_suit }
+      follow_card.suit == @trump_suit
     else
-      if follow_player.hand.any? { |card| card.suit == @trump_suit }
-        follow_card.suit == @trump_suit
-      else
-        true
-      end
+      true
     end
   end
 
@@ -95,13 +93,12 @@ class Game
     lead_player.play(lead_card)
     follow_player.play(follow_card)
 
-    if lead_card.suit != follow_card.suit && follow_card.suit != @trump_suit
-      @trick_winner = lead_player
-    elsif lead_card.suit == follow_card.suit && lead_card.strength > follow_card.strength
-      @trick_winner = lead_player
-    else
-      @trick_winner = follow_player
-    end
+    @trick_winner = if (lead_card.suit != follow_card.suit && follow_card.suit != @trump_suit) ||
+                       (lead_card.suit == follow_card.suit && lead_card.strength > follow_card.strength)
+                      lead_player
+                    else
+                      follow_player
+                    end
 
     @trick_winner.add_point
     @ui.display_trick_winner(@trick_winner)
@@ -133,9 +130,6 @@ class Game
       @player1
     elsif @player1.score < @player2.score
       @player2
-    else
-      nil
     end
   end
 end
-
diff --git a/lib/player.rb b/lib/player.rb
index e52ea4c..806a35c 100644
--- a/lib/player.rb
+++ b/lib/player.rb
@@ -28,4 +28,3 @@ class Player
     @score += 1
   end
 end
-
diff --git a/lib/terminal_ui.rb b/lib/terminal_ui.rb
index 469b543..83b634d 100644
--- a/lib/terminal_ui.rb
+++ b/lib/terminal_ui.rb
@@ -1,17 +1,16 @@
 # Gère l'affichage et les saisies dans le terminal.
 class TerminalUI
-
   # Demande au joueur de choisir une carte et la retourne.
   def choose_card(player)
     player.hand.each_with_index do |card, index|
       puts "#{index + 1}. #{card}"
     end
 
-    print "Choose a card: "
+    print 'Choose a card: '
     choice = gets.chomp.to_i
 
     until choice.between?(1, player.hand.length)
-      print "Invalid choice. Choose a card: "
+      print 'Invalid choice. Choose a card: '
       choice = gets.chomp.to_i
     end
 
@@ -25,7 +24,7 @@ class TerminalUI
 
   # Affiche un avertissement si le coup joué ne respecte pas les règles.
   def display_wrong_card
-    puts "You cannot play this card."
+    puts 'You cannot play this card.'
   end
 
   # Affiche le joueur ayant remporté le pli.
@@ -52,7 +51,7 @@ class TerminalUI
     puts "Trump suit: #{game.trump_suit}"
     puts
 
-    puts "Stock:"
+    puts 'Stock:'
     puts game.stock.length
     puts
   end
diff --git a/test/card_test.rb b/test/card_test.rb
deleted file mode 100644
index e69de29..0000000
diff --git a/test/deck_test.rb b/test/deck_test.rb
deleted file mode 100644
index e69de29..0000000
diff --git a/test/game_test.rb b/test/game_test.rb
deleted file mode 100644
index e69de29..0000000
diff --git a/test/player_test.rb b/test/player_test.rb
deleted file mode 100644
index e69de29..0000000
diff --git a/test/terminal_ui_test.rb b/test/terminal_ui_test.rb
deleted file mode 100644
index e69de29..0000000