diff --git a/exercises/concept/amusement-park-improvements/.meta/exemplar.rb b/exercises/concept/amusement-park-improvements/.meta/exemplar.rb
index 3564509020..dd677df82c 100644
--- a/exercises/concept/amusement-park-improvements/.meta/exemplar.rb
+++ b/exercises/concept/amusement-park-improvements/.meta/exemplar.rb
@@ -7,11 +7,11 @@ def has_pass?
     !!@pass_id
   end
 
-  def issue_pass!(pass_id)
+  def issue_pass(pass_id)
     @pass_id = pass_id
   end
 
-  def revoke_pass!
+  def revoke_pass
     @pass_id = nil
   end
 
diff --git a/exercises/concept/amusement-park-improvements/attendee.rb b/exercises/concept/amusement-park-improvements/attendee.rb
index f8e09bb63c..f9da8688e3 100644
--- a/exercises/concept/amusement-park-improvements/attendee.rb
+++ b/exercises/concept/amusement-park-improvements/attendee.rb
@@ -3,11 +3,11 @@ def initialize(height)
     @height = height
   end
 
-  def issue_pass!(pass_id)
+  def issue_pass(pass_id)
     @pass_id = pass_id
   end
 
-  def revoke_pass!
+  def revoke_pass
     @pass_id = nil
   end
 
diff --git a/exercises/concept/amusement-park-improvements/attendee_test.rb b/exercises/concept/amusement-park-improvements/attendee_test.rb
index e345302785..a90dccbf8b 100644
--- a/exercises/concept/amusement-park-improvements/attendee_test.rb
+++ b/exercises/concept/amusement-park-improvements/attendee_test.rb
@@ -8,14 +8,14 @@ def test_new_instance_doesnt_have_pass
 
   def test_when_issued_pass
     attendee = Attendee.new(100)
-    attendee.issue_pass!(1)
+    attendee.issue_pass(1)
     assert attendee.has_pass?
   end
 
   def test_when_revoked_doesnt_have_pass
     attendee = Attendee.new(100)
-    attendee.issue_pass!(1)
-    attendee.revoke_pass!
+    attendee.issue_pass(1)
+    attendee.revoke_pass
     refute attendee.has_pass?
   end
 
@@ -37,13 +37,13 @@ def test_fits_ride_but_no_pass
 
   def test_fits_ride_and_pass
     attendee = Attendee.new(100)
-    attendee.issue_pass!(1)
+    attendee.issue_pass(1)
     assert attendee.allowed_to_ride?(100)
   end
 
   def test_does_not_fit_ride_and_pass
     attendee = Attendee.new(100)
-    attendee.issue_pass!(1)
+    attendee.issue_pass(1)
     refute attendee.allowed_to_ride?(120)
   end
 end
diff --git a/exercises/concept/amusement-park/.meta/exemplar.rb b/exercises/concept/amusement-park/.meta/exemplar.rb
index 49b0af1aec..62fc5a80b1 100644
--- a/exercises/concept/amusement-park/.meta/exemplar.rb
+++ b/exercises/concept/amusement-park/.meta/exemplar.rb
@@ -11,11 +11,11 @@ def pass_id
     @pass_id
   end
 
-  def issue_pass!(pass_id)
+  def issue_pass(pass_id)
     @pass_id = pass_id
   end
 
-  def revoke_pass!
+  def revoke_pass
     @pass_id = nil
   end
 end
diff --git a/exercises/concept/amusement-park/attendee.rb b/exercises/concept/amusement-park/attendee.rb
index add06a6334..b79995046b 100644
--- a/exercises/concept/amusement-park/attendee.rb
+++ b/exercises/concept/amusement-park/attendee.rb
@@ -11,11 +11,11 @@ def pass_id
     raise 'Implement the Attendee#pass_id method'
   end
 
-  def issue_pass!(pass_id)
-    raise 'Implement the Attendee#issue_pass! method'
+  def issue_pass(pass_id)
+    raise 'Implement the Attendee#issue_pass method'
   end
 
-  def revoke_pass!
-    raise 'Implement the Attendee#revoke_pass! method'
+  def revoke_pass
+    raise 'Implement the Attendee#revoke_pass method'
   end
 end
diff --git a/exercises/concept/amusement-park/attendee_test.rb b/exercises/concept/amusement-park/attendee_test.rb
index 61d411d558..bff9409ade 100644
--- a/exercises/concept/amusement-park/attendee_test.rb
+++ b/exercises/concept/amusement-park/attendee_test.rb
@@ -22,7 +22,7 @@ def test_issue_pass
     attendee = Attendee.new(height)
 
     pass_id = 1
-    attendee.issue_pass!(pass_id)
+    attendee.issue_pass(pass_id)
 
     assert_equal pass_id, attendee.pass_id
   end
@@ -31,8 +31,8 @@ def test_has_pass_after_revoked
     height = 100
     attendee = Attendee.new(height)
     pass_id = 1
-    attendee.issue_pass!(pass_id)
-    attendee.revoke_pass!
+    attendee.issue_pass(pass_id)
+    attendee.revoke_pass
     refute attendee.pass_id
   end
 end
diff --git a/exercises/concept/moviegoer/.meta/exemplar.rb b/exercises/concept/moviegoer/.meta/exemplar.rb
index ed8aa8af6b..5fd84fd987 100644
--- a/exercises/concept/moviegoer/.meta/exemplar.rb
+++ b/exercises/concept/moviegoer/.meta/exemplar.rb
@@ -17,7 +17,7 @@ def watch_scary_movie?
     age >= 18
   end
 
-  def claim_free_popcorn!
+  def claim_free_popcorn
     raise NotMovieClubMemberError unless member
 
     "🍿"
diff --git a/exercises/concept/moviegoer/moviegoer.rb b/exercises/concept/moviegoer/moviegoer.rb
index 1fd01c6da8..e63f940cab 100644
--- a/exercises/concept/moviegoer/moviegoer.rb
+++ b/exercises/concept/moviegoer/moviegoer.rb
@@ -17,7 +17,7 @@ def watch_scary_movie?
   end
 
   # Popcorn is 🍿
-  def claim_free_popcorn!
+  def claim_free_popcorn
     raise 'Please implement the Moviegoer#claim_free_popcorn method'
   end
 end
diff --git a/exercises/concept/moviegoer/moviegoer_test.rb b/exercises/concept/moviegoer/moviegoer_test.rb
index c31a3e4641..caabce2df5 100644
--- a/exercises/concept/moviegoer/moviegoer_test.rb
+++ b/exercises/concept/moviegoer/moviegoer_test.rb
@@ -19,12 +19,12 @@ def test_kids_cant_see_the_scary_movie
   end
 
   def test_members_get_free_popcorn
-    assert_equal "🍿", Moviegoer.new(25, member: true).claim_free_popcorn!
+    assert_equal "🍿", Moviegoer.new(25, member: true).claim_free_popcorn
   end
 
   def test_regular_moviegoers_dont_get_free_popcorn
     assert_raises NotMovieClubMemberError do
-      Moviegoer.new(25, member: false).claim_free_popcorn!
+      Moviegoer.new(25, member: false).claim_free_popcorn
     end
   end
 end
diff --git a/exercises/practice/gilded-rose/.meta/example.rb b/exercises/practice/gilded-rose/.meta/example.rb
index 4a3e936b45..225c492536 100644
--- a/exercises/practice/gilded-rose/.meta/example.rb
+++ b/exercises/practice/gilded-rose/.meta/example.rb
@@ -8,22 +8,22 @@ def initialize(name:, sell_in:, quality:)
 
   def conjured? = @conjured
 
-  def update!
-    update_quality!
+  def update
+    update_quality
     @quality = 0 if quality < 0
     @quality = 0 if conjured? && sell_in <= 0
     @quality = max_quality if quality > max_quality
 
-    update_sell_in!
+    update_sell_in
   end
 
   private
 
   def max_quality = 50
 
-  def update_quality! = raise NotImplementedError
+  def update_quality = raise NotImplementedError
 
-  def update_sell_in! = @sell_in -= 1
+  def update_sell_in = @sell_in -= 1
 end
 
 class NormalItem < AbstractItem
@@ -31,7 +31,7 @@ def self.name_regex = /.+/ # Should be checked last, after other item types.
 
   private
 
-  def update_quality!
+  def update_quality
     quality_change = -1
     quality_change -= 1 if sell_in <= 0
     quality_change *= 2 if conjured?
@@ -45,7 +45,7 @@ def self.name_regex = /Aged Brie/
 
   private
 
-  def update_quality!
+  def update_quality
     quality_change = 1
     quality_change += 1 if sell_in <= 0
 
@@ -60,10 +60,10 @@ def self.name_regex = /Sulfuras, Hand of Ragnaros/
 
   def max_quality = 80
 
-  def update_quality!
+  def update_quality
   end
 
-  def update_sell_in!
+  def update_sell_in
     @sell_in -= 1 if conjured?
   end
 end
@@ -73,7 +73,7 @@ def self.name_regex = /Backstage passes to a TAFKAL80ETC concert/i
 
   private
 
-  def update_quality!
+  def update_quality
     @quality = 0 and return if sell_in <= 0
 
     quality_change = 1
@@ -103,9 +103,9 @@ def initialize(items)
     @items = items
   end
 
-  def update!
+  def update
     @items.each do |item|
-      item.update!
+      item.update
     end
   end
 end
diff --git a/exercises/practice/gilded-rose/gilded_rose.rb b/exercises/practice/gilded-rose/gilded_rose.rb
index 45cbf099aa..9f255847dc 100644
--- a/exercises/practice/gilded-rose/gilded_rose.rb
+++ b/exercises/practice/gilded-rose/gilded_rose.rb
@@ -5,7 +5,7 @@ def initialize(items)
     @items = items
   end
 
-  def update!
+  def update
     @items.each do |item|
       if item.name != "Aged Brie" && item.name != "Backstage passes to a TAFKAL80ETC concert"
         if item.quality > 0
diff --git a/exercises/practice/gilded-rose/gilded_rose_test.rb b/exercises/practice/gilded-rose/gilded_rose_test.rb
index 566361958d..4dcba9300b 100644
--- a/exercises/practice/gilded-rose/gilded_rose_test.rb
+++ b/exercises/practice/gilded-rose/gilded_rose_test.rb
@@ -4,7 +4,7 @@
 class GildedRoseTest < Minitest::Test
   def update_with(sell_in:, quality:, name:, sell_in_change: -1, quality_change: -1)
     item = Item.new(name:, sell_in:, quality:)
-    GildedRose.new([item]).update!
+    GildedRose.new([item]).update
 
     assert_equal sell_in + sell_in_change, item.sell_in
     assert_equal quality + quality_change, item.quality
@@ -239,7 +239,7 @@ def test_multiple_items
     normal_item = Item.new(name: "some item", sell_in: 1, quality: 10)
     aged_brie = Item.new(name: "Aged Brie", sell_in: -1, quality: 10)
 
-    GildedRose.new([normal_item, aged_brie]).update!
+    GildedRose.new([normal_item, aged_brie]).update
 
     assert_equal 9, normal_item.quality
     assert_equal 0, normal_item.sell_in
diff --git a/exercises/practice/simple-linked-list/.meta/example.rb b/exercises/practice/simple-linked-list/.meta/example.rb
index 5c3af10b88..11e81badd2 100644
--- a/exercises/practice/simple-linked-list/.meta/example.rb
+++ b/exercises/practice/simple-linked-list/.meta/example.rb
@@ -34,7 +34,7 @@ def pop
     element
   end
 
-  def reverse!
+  def reverse
     previous = nil
     pointer = @head
     while pointer
diff --git a/exercises/practice/simple-linked-list/simple_linked_list_test.rb b/exercises/practice/simple-linked-list/simple_linked_list_test.rb
index eb07b74895..65eb118594 100644
--- a/exercises/practice/simple-linked-list/simple_linked_list_test.rb
+++ b/exercises/practice/simple-linked-list/simple_linked_list_test.rb
@@ -103,7 +103,7 @@ def test_list_from_array_still_acts_as_lifo
     assert_equal 3, element.datum
   end
 
-  def test_list_in_place_reverse!
+  def test_list_in_place_reverse
     skip
     first = Element.new(1)
     second = Element.new(2)
@@ -111,7 +111,7 @@ def test_list_in_place_reverse!
     list = SimpleLinkedList.new
     list.push(first).push(second).push(third)
 
-    assert_equal [1, 2, 3], list.reverse!.to_a
+    assert_equal [1, 2, 3], list.reverse.to_a
   end
 
   def test_list_in_place_reverse_are_the_same_elements
@@ -121,7 +121,7 @@ def test_list_in_place_reverse_are_the_same_elements
     list = SimpleLinkedList.new
     list.push(first).push(second)
 
-    list.reverse!
+    list.reverse
 
     assert_equal first, list.pop
     assert_equal second, list.pop
@@ -130,7 +130,7 @@ def test_list_in_place_reverse_are_the_same_elements
   def test_list_reverse_empty_list
     skip
     list = SimpleLinkedList.new
-    assert_equal list, list.reverse!
+    assert_equal list, list.reverse
   end
 
   def test_works_for_1_through_10