diff --git a/core/lib/spree/testing_support.rb b/core/lib/spree/testing_support.rb
index ce93cec034c..1965ef74f3f 100644
--- a/core/lib/spree/testing_support.rb
+++ b/core/lib/spree/testing_support.rb
@@ -1,6 +1,12 @@
 # frozen_string_literal: true
 
 require 'spree/testing_support/factory_bot'
+require 'spree/deprecation'
+
+Spree::Deprecation.warn <<-WARN
+  Using `require 'spree/testing_support'` is deprecated and will be removed in
+  Solidus 4.0.
+WARN
 
 module Spree
   module TestingSupport
@@ -11,5 +17,6 @@ module TestingSupport
     def check_factory_bot_version
       Spree::TestingSupport::FactoryBot.check_version
     end
+    deprecate :check_factory_bot_version, deprecator: Spree::Deprecation
   end
 end
diff --git a/core/lib/spree/testing_support/factory_bot.rb b/core/lib/spree/testing_support/factory_bot.rb
index 7f990b5187e..68b10759247 100644
--- a/core/lib/spree/testing_support/factory_bot.rb
+++ b/core/lib/spree/testing_support/factory_bot.rb
@@ -30,6 +30,7 @@ def self.check_version
           MSG
         end
       end
+      deprecate :check_version, deprecator: Spree::Deprecation
 
       def self.add_definitions!
         ::FactoryBot.definition_file_paths.unshift(*definition_file_paths).uniq!