diff --git a/lib/rr.rb b/lib/rr.rb
index 6a11e44e..9f28ed37 100644
--- a/lib/rr.rb
+++ b/lib/rr.rb
@@ -1,6 +1,7 @@
 dir = File.dirname(__FILE__)
 require 'forwardable'
 
+require "#{dir}/rr/class_instance_method_defined"
 require "#{dir}/rr/blank_slate"
 
 require "#{dir}/rr/errors/rr_error"
@@ -47,7 +48,6 @@
 require "#{dir}/rr/hash_with_object_id_key"
 require "#{dir}/rr/recorded_calls"
 require "#{dir}/rr/proc_from_block"
-require "#{dir}/rr/class_instance_method_defined"
 
 require "#{dir}/rr/double_definitions/double_definition_create_blank_slate"
 require "#{dir}/rr/double_definitions/double_definition_create"
diff --git a/lib/rr/class_instance_method_defined.rb b/lib/rr/class_instance_method_defined.rb
index 601598b7..c4a2063b 100644
--- a/lib/rr/class_instance_method_defined.rb
+++ b/lib/rr/class_instance_method_defined.rb
@@ -1,6 +1,6 @@
 module RR
   module ClassInstanceMethodDefined
-    def self.call(klass, instance_method, include_super=true)
+    def class_instance_method_defined(klass, instance_method, include_super=true)
       klass.instance_methods(include_super).detect {|method_name| method_name.to_sym == instance_method.to_sym} ||
         klass.protected_instance_methods(include_super).detect {|method_name| method_name.to_sym == instance_method.to_sym} ||
         klass.private_instance_methods(include_super).detect {|method_name| method_name.to_sym == instance_method.to_sym}
diff --git a/lib/rr/injections/double_injection.rb b/lib/rr/injections/double_injection.rb
index e1d28363..e75b627b 100644
--- a/lib/rr/injections/double_injection.rb
+++ b/lib/rr/injections/double_injection.rb
@@ -83,6 +83,7 @@ def instances
           end
         end
       end)
+      include ClassInstanceMethodDefined
 
       attr_reader :subject_class, :method_name, :doubles
 
@@ -178,7 +179,7 @@ def dispatch_original_method(subject, args, block)
       end
 
       def subject_has_original_method_missing?
-        ClassInstanceMethodDefined.call(subject_class, MethodDispatches::MethodMissingDispatch.original_method_missing_alias_name)
+        class_instance_method_defined(subject_class, MethodDispatches::MethodMissingDispatch.original_method_missing_alias_name)
       end
 
       def original_method_alias_name
diff --git a/lib/rr/injections/injection.rb b/lib/rr/injections/injection.rb
index fa5baca4..8000d34d 100644
--- a/lib/rr/injections/injection.rb
+++ b/lib/rr/injections/injection.rb
@@ -8,9 +8,10 @@ def instances
       end)
 
       include Space::Reader
+      include ClassInstanceMethodDefined
 
       def subject_has_method_defined?(method_name_in_question)
-        ClassInstanceMethodDefined.call(subject_class, method_name_in_question)
+        class_instance_method_defined(subject_class, method_name_in_question)
       end
 
       def subject_has_original_method?
@@ -20,7 +21,7 @@ def subject_has_original_method?
       protected
       def subject_respond_to_method?(subject, method_name)
         subject_has_method_defined?(method_name) ||
-          ClassInstanceMethodDefined.call(subject_class, :respond_to?) &&
+          class_instance_method_defined(subject_class, :respond_to?) &&
           subject.respond_to?(method_name)
       end
     end
diff --git a/lib/rr/injections/method_missing_injection.rb b/lib/rr/injections/method_missing_injection.rb
index 89a5608f..d8f27428 100644
--- a/lib/rr/injections/method_missing_injection.rb
+++ b/lib/rr/injections/method_missing_injection.rb
@@ -12,6 +12,7 @@ def exists?(subject)
           instances.include?(subject)
         end
       end)
+      include ClassInstanceMethodDefined
 
       attr_reader :subject_class
       def initialize(subject_class)
@@ -20,8 +21,8 @@ def initialize(subject_class)
       end
 
       def bind
-        unless ClassInstanceMethodDefined.call(subject_class, original_method_alias_name)
-          unless ClassInstanceMethodDefined.call(subject_class, :method_missing)
+        unless class_instance_method_defined(subject_class, original_method_alias_name)
+          unless class_instance_method_defined(subject_class, :method_missing)
             @placeholder_method_defined = true
             subject_class.class_eval do
               def method_missing(method_name, *args, &block)
diff --git a/lib/rr/injections/singleton_method_added_injection.rb b/lib/rr/injections/singleton_method_added_injection.rb
index 2b533f3c..29e76b99 100644
--- a/lib/rr/injections/singleton_method_added_injection.rb
+++ b/lib/rr/injections/singleton_method_added_injection.rb
@@ -16,6 +16,7 @@ def exists?(subject)
           instances.include?(subject)
         end
       end)
+      include ClassInstanceMethodDefined
 
       attr_reader :subject_class
       def initialize(subject_class)
@@ -24,8 +25,8 @@ def initialize(subject_class)
       end
 
       def bind
-        unless ClassInstanceMethodDefined.call(subject_class, original_method_alias_name, false)
-          unless ClassInstanceMethodDefined.call(subject_class, :singleton_method_added, false)
+        unless class_instance_method_defined(subject_class, original_method_alias_name, false)
+          unless class_instance_method_defined(subject_class, :singleton_method_added, false)
             @placeholder_method_defined = true
             subject_class.class_eval do
               def singleton_method_added(method_name)