diff --git a/README.rdoc b/README.rdoc
index e00adbb7..8fb486ca 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -38,8 +38,8 @@ Windows from the command prompt (+cmd.exe+)
 
 If you don't have +rake+ installed, just run <code>gem install rake</code>
 
-Any response for Ruby with a version number greater than 1.8 is fine (should be
-around 1.8.6 or more). Any version of +rake+ will do.
+Any response for Ruby with a version number greater than 1.9 is fine. Any version of
++rake+ will do.
 
 == Generating the Koans
 
diff --git a/src/about_classes.rb b/src/about_classes.rb
index 48c80543..9d8fae45 100644
--- a/src/about_classes.rb
+++ b/src/about_classes.rb
@@ -22,7 +22,7 @@ def test_instance_variables_can_be_set_by_assigning_to_them
     assert_equal __([]), fido.instance_variables
 
     fido.set_name("Fido")
-    assert_equal __(["@name"], [:@name]), fido.instance_variables
+    assert_equal __([:@name]), fido.instance_variables
   end
 
   def test_instance_variables_cannot_be_accessed_outside_the_class
@@ -180,7 +180,7 @@ def test_inspect_provides_a_more_complete_string_version
   def test_all_objects_support_to_s_and_inspect
     array = [1,2,3]
 
-    assert_equal __("123", "[1, 2, 3]"), array.to_s
+    assert_equal __("[1, 2, 3]"), array.to_s
     assert_equal __("[1, 2, 3]"), array.inspect
 
     assert_equal __("STRING"), "STRING".to_s
diff --git a/src/about_hashes.rb b/src/about_hashes.rb
index 327bfc2a..47a33020 100644
--- a/src/about_hashes.rb
+++ b/src/about_hashes.rb
@@ -23,7 +23,7 @@ def test_accessing_hashes
   def test_accessing_hashes_with_fetch
     hash = { :one => "uno" }
     assert_equal __("uno"), hash.fetch(:one)
-    assert_raise(___(IndexError, KeyError)) do
+    assert_raise(___(KeyError)) do
       hash.fetch(:doesnt_exist)
     end
 
diff --git a/src/about_iteration.rb b/src/about_iteration.rb
index c0362173..faabd5d8 100644
--- a/src/about_iteration.rb
+++ b/src/about_iteration.rb
@@ -2,29 +2,8 @@
 
 class AboutIteration < Neo::Koan
 
-  # -- An Aside ------------------------------------------------------
-  # Ruby 1.8 stores names as strings. Ruby 1.9 and later stores names
-  # as symbols. So we use a version dependent method "as_name" to
-  # convert to the right format in the koans. We will use "as_name"
-  # whenever comparing to lists of methods.
-
-  in_ruby_version("1.8") do
-    def as_name(name)
-      name.to_s
-    end
-  end
-
-  in_ruby_version("1.9", "2", "3", "4") do
-    def as_name(name)
-      name.to_sym
-    end
-  end
-
-  # Ok, now back to the Koans.
-  # -------------------------------------------------------------------
-
   def test_each_is_a_method_on_arrays
-    assert_equal __(true), [].methods.include?(as_name(:each))
+    assert_equal __(true), [].methods.include?(:each)
   end
 
   def test_iterating_with_each
diff --git a/src/about_scope.rb b/src/about_scope.rb
index 4760a9ae..fc872a6c 100644
--- a/src/about_scope.rb
+++ b/src/about_scope.rb
@@ -73,7 +73,7 @@ def test_constants_can_be_looked_up_explicitly
   end
 
   def test_you_can_get_a_list_of_constants_for_any_class_or_module
-    assert_equal __(["Dog"], [:Dog]), Jims.constants
+    assert_equal __([:Dog]), Jims.constants
     assert Object.constants.size > _n_(10)
   end
 end
diff --git a/src/about_strings.rb b/src/about_strings.rb
index 69221f0a..20026a12 100644
--- a/src/about_strings.rb
+++ b/src/about_strings.rb
@@ -145,25 +145,12 @@ def test_you_can_get_a_substring_from_a_string
 
   def test_you_can_get_a_single_character_from_a_string
     string = "Bacon, lettuce and tomato"
-    assert_equal __(97, 'a'), string[1]
-
-    # Surprised?
-  end
-
-  in_ruby_version("1.8") do
-    def test_in_older_ruby_single_characters_are_represented_by_integers
-      assert_equal __(97, 'a'), ?a
-      assert_equal __(true, false), ?a == 97
-
-      assert_equal __(true), ?b == (?a + 1)
-    end
+    assert_equal __('a'), string[1]
   end
 
-  in_ruby_version("1.9", "2", "3", "4") do
-    def test_in_modern_ruby_single_characters_are_represented_by_strings
-      assert_equal __('a'), ?a
-      assert_equal __(false), ?a == 97
-    end
+  def test_in_modern_ruby_single_characters_are_represented_by_strings
+    assert_equal __('a'), ?a
+    assert_equal __(false), ?a == 97
   end
 
   def test_strings_can_be_split
diff --git a/src/neo.rb b/src/neo.rb
index 0985362a..6142281f 100644
--- a/src/neo.rb
+++ b/src/neo.rb
@@ -29,37 +29,19 @@ def before_ruby_version(version)
   Gem::Version.new(RUBY_VERSION) < Gem::Version.new(version)
 end
 
-in_ruby_version("1.8") do
-  class KeyError < StandardError
-  end
-end
-
 # Standard, generic replacement value.
-# If value19 is given, it is used in place of value for Ruby 1.9.
-def __(value="FILL ME IN", value19=:mu)
-  if RUBY_VERSION < "1.9"
-    value
-  else
-    (value19 == :mu) ? value : value19
-  end
+def __(value="FILL ME IN")
+  value
 end
 
 # Numeric replacement value.
-def _n_(value=999999, value19=:mu)
-  if RUBY_VERSION < "1.9"
-    value
-  else
-    (value19 == :mu) ? value : value19
-  end
+def _n_(value=999999)
+  value
 end
 
 # Error object replacement value.
-def ___(value=FillMeInError, value19=:mu)
-  if RUBY_VERSION < "1.9"
-    value
-  else
-    (value19 == :mu) ? value : value19
-  end
+def ___(value=FillMeInError)
+  value
 end
 
 # Method name replacement.
@@ -70,9 +52,7 @@ def ____(method=nil)
     end
   end
 
-  in_ruby_version("1.9", "2", "3", "4") do
-    public :method_missing
-  end
+  public :method_missing
 end
 
 class String