diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index 34ea09331c..f4900fab59 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -422,18 +422,20 @@ def cache_key_with_version
     # Please check unscoped if you want to remove all previous scopes (including
     # the default_scope) during the execution of a block.
     def scoping(all_queries: nil)
-      if global_scope? && all_queries == false
+      registry = klass.scope_registry
+      if global_scope?(registry) && all_queries == false
         raise ArgumentError, "Scoping is set to apply to all queries and cannot be unset in a nested block."
-      elsif already_in_scope?
+      elsif already_in_scope?(registry)
         yield
       else
-        _scoping(self, all_queries) { yield }
+        _scoping(self, registry, all_queries) { yield }
       end
     end
 
     def _exec_scope(*args, &block) # :nodoc:
       @delegate_to_klass = true
-      _scoping(nil) { instance_exec(*args, &block) || self }
+      registry = klass.scope_registry
+      _scoping(nil, registry) { instance_exec(*args, &block) || self }
     ensure
       @delegate_to_klass = false
     end
@@ -830,12 +832,12 @@ def null_relation? # :nodoc:
       end
 
     private
-      def already_in_scope?
-        @delegate_to_klass && klass.current_scope(true)
+      def already_in_scope?(registry)
+        @delegate_to_klass && registry.current_scope(klass, true)
       end
 
-      def global_scope?
-        klass.global_current_scope(true)
+      def global_scope?(registry)
+        registry.global_current_scope(klass, true)
       end
 
       def current_scope_restoring_block(&block)
@@ -858,16 +860,19 @@ def _create!(attributes, &block)
         klass.create!(attributes, &block)
       end
 
-      def _scoping(scope, all_queries = false)
-        previous, klass.current_scope = klass.current_scope(true), scope
+      def _scoping(scope, registry, all_queries = false)
+        previous = registry.current_scope(klass, true)
+        registry.set_current_scope(klass, scope)
+
         if all_queries
-          previous_global, klass.global_current_scope = klass.global_current_scope(true), scope
+          previous_global = registry.global_current_scope(klass, true)
+          registry.set_global_current_scope(klass, scope)
         end
         yield
       ensure
-        klass.current_scope = previous
+        registry.set_current_scope(klass, previous)
         if all_queries
-          klass.global_current_scope = previous_global
+          registry.set_global_current_scope(klass, previous_global)
         end
       end
 
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb
index 8636b34434..5f3be4733e 100644
--- a/activerecord/lib/active_record/relation/spawn_methods.rb
+++ b/activerecord/lib/active_record/relation/spawn_methods.rb
@@ -8,7 +8,7 @@ module ActiveRecord
   module SpawnMethods
     # This is overridden by Associations::CollectionProxy
     def spawn #:nodoc:
-      already_in_scope? ? klass.all : clone
+      already_in_scope?(klass.scope_registry) ? klass.all : clone
     end
 
     # Merges in the conditions from <tt>other</tt>, if <tt>other</tt> is an ActiveRecord::Relation.
diff --git a/activerecord/lib/active_record/scoping.rb b/activerecord/lib/active_record/scoping.rb
index 54eeb952a3..96d3cba49c 100644
--- a/activerecord/lib/active_record/scoping.rb
+++ b/activerecord/lib/active_record/scoping.rb
@@ -24,19 +24,23 @@ def scope_attributes?
       end
 
       def current_scope(skip_inherited_scope = false)
-        ScopeRegistry.value_for(:current_scope, self, skip_inherited_scope)
+        ScopeRegistry.current_scope(self, skip_inherited_scope)
       end
 
       def current_scope=(scope)
-        ScopeRegistry.set_value_for(:current_scope, self, scope)
+        ScopeRegistry.set_current_scope(self, scope)
       end
 
       def global_current_scope(skip_inherited_scope = false)
-        ScopeRegistry.value_for(:global_current_scope, self, skip_inherited_scope)
+        ScopeRegistry.global_current_scope(self, skip_inherited_scope)
       end
 
       def global_current_scope=(scope)
-        ScopeRegistry.set_value_for(:global_current_scope, self, scope)
+        ScopeRegistry.set_global_current_scope(self, scope)
+      end
+
+      def scope_registry
+        ScopeRegistry.instance
       end
     end
 
@@ -80,34 +84,40 @@ class ScopeRegistry # :nodoc:
       VALID_SCOPE_TYPES = [:current_scope, :ignore_default_scope, :global_current_scope]
 
       def initialize
-        @registry = Hash.new { |hash, key| hash[key] = {} }
+        @current_scope        = {}
+        @ignore_default_scope = {}
+        @global_current_scope = {}
       end
 
-      # Obtains the value for a given +scope_type+ and +model+.
-      def value_for(scope_type, model, skip_inherited_scope = false)
-        raise_invalid_scope_type!(scope_type)
-        return @registry[scope_type][model.name] if skip_inherited_scope
-        klass = model
-        base = model.base_class
-        while klass <= base
-          value = @registry[scope_type][klass.name]
-          return value if value
-          klass = klass.superclass
+      VALID_SCOPE_TYPES.each do |type|
+        class_eval <<-eorb, __FILE__, __LINE__
+        def #{type}(model, skip_inherited_scope = false)
+          value_for(@#{type}, model, skip_inherited_scope)
         end
-      end
 
-      # Sets the +value+ for a given +scope_type+ and +model+.
-      def set_value_for(scope_type, model, value)
-        raise_invalid_scope_type!(scope_type)
-        @registry[scope_type][model.name] = value
+        def set_#{type}(model, value)
+          set_value_for(@#{type}, model, value)
+        end
+        eorb
       end
 
       private
-        def raise_invalid_scope_type!(scope_type)
-          if !VALID_SCOPE_TYPES.include?(scope_type)
-            raise ArgumentError, "Invalid scope type '#{scope_type}' sent to the registry. Scope types must be included in VALID_SCOPE_TYPES"
+        # Obtains the value for a given +scope_type+ and +model+.
+        def value_for(scope_type, model, skip_inherited_scope = false)
+          return scope_type[model.name] if skip_inherited_scope
+          klass = model
+          base = model.base_class
+          while klass <= base
+            value = scope_type[klass.name]
+            return value if value
+            klass = klass.superclass
           end
         end
+
+        # Sets the +value+ for a given +scope_type+ and +model+.
+        def set_value_for(scope_type, model, value)
+          scope_type[model.name] = value
+        end
     end
   end
 end
diff --git a/activerecord/lib/active_record/scoping/default.rb b/activerecord/lib/active_record/scoping/default.rb
index c748eea5c9..0b81cc461e 100644
--- a/activerecord/lib/active_record/scoping/default.rb
+++ b/activerecord/lib/active_record/scoping/default.rb
@@ -173,11 +173,11 @@ def execute_scope?(all_queries, default_scope_obj)
           end
 
           def ignore_default_scope?
-            ScopeRegistry.value_for(:ignore_default_scope, base_class)
+            ScopeRegistry.ignore_default_scope(base_class)
           end
 
           def ignore_default_scope=(ignore)
-            ScopeRegistry.set_value_for(:ignore_default_scope, base_class, ignore)
+            ScopeRegistry.set_ignore_default_scope(base_class, ignore)
           end
 
           # The ignore_default_scope flag is used to prevent an infinite recursion
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index 51f9d476f0..beb1a8a8ff 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -1259,9 +1259,9 @@ def test_current_scope_is_reset
 
     UnloadablePost.unloadable
     klass = UnloadablePost
-    assert_not_nil ActiveRecord::Scoping::ScopeRegistry.value_for(:current_scope, klass)
+    assert_not_nil ActiveRecord::Scoping::ScopeRegistry.current_scope(klass)
     ActiveSupport::Dependencies.remove_unloadable_constants!
-    assert_nil ActiveRecord::Scoping::ScopeRegistry.value_for(:current_scope, klass)
+    assert_nil ActiveRecord::Scoping::ScopeRegistry.current_scope(klass)
   ensure
     Object.class_eval { remove_const :UnloadablePost } if defined?(UnloadablePost)
   end
diff --git a/activerecord/test/models/post.rb b/activerecord/test/models/post.rb
index d55d1e16ae..15f7f55725 100644
--- a/activerecord/test/models/post.rb
+++ b/activerecord/test/models/post.rb
@@ -324,6 +324,10 @@ class FakeKlass
   extend ActiveRecord::Delegation::DelegateCache
 
   class << self
+    def scope_registry
+      ActiveRecord::Scoping::ScopeRegistry.instance
+    end
+
     def connection
       Post.connection
     end