diff --git a/Rakefile b/Rakefile
index 87233b3..e842bf9 100644
--- a/Rakefile
+++ b/Rakefile
@@ -2,24 +2,29 @@ require "bundler/gem_tasks"
 require "rake/testtask"
 require "rubocop/rake_task"
 
-Rake::TestTask.new(:rubocop_md_tests) do |t|
+Rake::TestTask.new("test:default") do |t|
   t.libs << "test"
   t.libs << "lib"
   t.warning = false
   t.test_files = FileList["test/**/*_test.rb"]
 end
 
-RuboCop::RakeTask.new
-
-task :test do
-  ENV["MD_LOAD_MODE"] = "inline"
-  $stdout.puts "⚙️ Runs rubocop with '-r rubocop_md' options"
-  Rake::Task[:rubocop_md_tests].invoke
+namespace :test do
+  task :options do
+    sh <<~COMMAND
+      MD_LOAD_MODE=options rake test:default
+    COMMAND
+  end
 
-  ENV["MD_LOAD_MODE"] = "config"
-  $stdout.puts "⚙️ Runs rubocop with 'required rubocop_md' section in .rubocop.yml"
-  Rake::Task[:rubocop_md_tests].reenable
-  Rake::Task[:rubocop_md_tests].invoke
+  task :config do
+    sh <<~COMMAND
+      MD_LOAD_MODE=config rake test:default
+    COMMAND
+  end
 end
 
+RuboCop::RakeTask.new
+
+task test: ["test:options", "test:config"]
+
 task default: [:rubocop, :test]
diff --git a/lib/rubocop/markdown/rubocop_ext.rb b/lib/rubocop/markdown/rubocop_ext.rb
index 1bfbc56..8a387ce 100644
--- a/lib/rubocop/markdown/rubocop_ext.rb
+++ b/lib/rubocop/markdown/rubocop_ext.rb
@@ -43,7 +43,7 @@ def markdown_file?(file)
 RuboCop::Runner.prepend(Module.new do
   # Set config store for Markdown
   def get_processed_source(*args)
-    RuboCop::Markdown.config_store = @config_store
+    RuboCop::Markdown.config_store = @config_store unless RuboCop::Markdown.config_store
 
     super
   end
diff --git a/test/fixtures/configs/no_autodetect.yml b/test/fixtures/configs/no_autodetect.yml
index 82a6a9e..a6e1f35 100644
--- a/test/fixtures/configs/no_autodetect.yml
+++ b/test/fixtures/configs/no_autodetect.yml
@@ -1,4 +1,4 @@
-inherit_from: "../.rubocop.yml"
+inherit_from: "../../../.rubocop.yml"
 
 Markdown:
   Autodetect: false
diff --git a/test/fixtures/configs/no_autodetect_with_require.yml b/test/fixtures/configs/no_autodetect_with_require.yml
new file mode 100644
index 0000000..8f0587f
--- /dev/null
+++ b/test/fixtures/configs/no_autodetect_with_require.yml
@@ -0,0 +1,7 @@
+inherit_from: "../../../.rubocop.yml"
+
+require:
+  - "rubocop-md"
+
+Markdown:
+  Autodetect: false
diff --git a/test/fixtures/configs/no_warn_invalid.yml b/test/fixtures/configs/no_warn_invalid.yml
index f6c7f71..b736833 100644
--- a/test/fixtures/configs/no_warn_invalid.yml
+++ b/test/fixtures/configs/no_warn_invalid.yml
@@ -1,4 +1,4 @@
-inherit_from: "../.rubocop.yml"
+inherit_from: "../../../.rubocop.yml"
 
 Markdown:
   WarnInvalid: false
diff --git a/test/fixtures/configs/no_warn_invalid_with_require.yml b/test/fixtures/configs/no_warn_invalid_with_require.yml
new file mode 100644
index 0000000..f569fba
--- /dev/null
+++ b/test/fixtures/configs/no_warn_invalid_with_require.yml
@@ -0,0 +1,8 @@
+inherit_from: "../../../.rubocop.yml"
+
+require:
+  - "rubocop-md"
+
+Markdown:
+  WarnInvalid: false
+
diff --git a/test/integration_test.rb b/test/integration_test.rb
index b04fb23..bfc5655 100644
--- a/test/integration_test.rb
+++ b/test/integration_test.rb
@@ -5,31 +5,29 @@
 require "fileutils"
 
 module RuboCopRunner
-  MD_LOAD_INLINE_MODE = "inline"
+  def run_rubocop(path, options: "", config: nil)
+    md_path = File.expand_path("../lib/rubocop-md.rb", __dir__)
+    md_config_path = File.expand_path("./fixtures/.rubocop.yml", __dir__)
+
+    options = "#{options} -r #{md_path}" if ENV["MD_LOAD_MODE"] == "options"
+
+    if ENV["MD_LOAD_MODE"] == "config"
+      # Add "_with_require" suffix
+      config = if config
+                 config.sub(/\.yml$/, "_with_require.yml")
+               else
+                 md_config_path
+               end
+    end
+
+    options = "#{options} -c #{config}" if config
 
-  def run_rubocop(path, options: "")
     output, _status = Open3.capture2(
-      cmd_command_by_env(path, options),
+      "bundle exec rubocop #{options} #{path}",
       chdir: File.join(__dir__, "fixtures")
     )
-
     output
   end
-
-  private
-
-  def cmd_command_by_env(path, options)
-    cmd_command = "bundle exec rubocop"
-    load_mode = ENV.fetch("MD_LOAD_MODE", MD_LOAD_INLINE_MODE)
-
-    if load_mode == MD_LOAD_INLINE_MODE
-      md_path = File.expand_path("../lib/rubocop-md.rb", __dir__)
-
-      cmd_command = "#{cmd_command} -r #{md_path}"
-    end
-
-    "#{cmd_command} #{options} #{path}"
-  end
 end
 
 class RuboCop::Markdown::AnalyzeTest < Minitest::Test
@@ -70,7 +68,7 @@ def test_multiple_invalid_snippets_file
   def test_multiple_invalid_snippets_file_no_warn
     res = run_rubocop(
       "multiple_invalid_snippets.md",
-      options: "-c configs/no_warn_invalid.yml"
+      config: "configs/no_warn_invalid.yml"
     )
 
     assert_match %r{Inspecting 1 file}, res
@@ -80,7 +78,7 @@ def test_multiple_invalid_snippets_file_no_warn
   def test_multiple_invalid_snippets_file_no_autodetect
     res = run_rubocop(
       "multiple_invalid_snippets_unknown.md",
-      options: "-c configs/no_autodetect.yml"
+      config: "configs/no_autodetect.yml"
     )
 
     assert_match %r{Inspecting 1 file}, res
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 859fb41..925df7d 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,6 +1,13 @@
 # frozen_string_literal: true
 
 $LOAD_PATH.unshift File.expand_path("../lib", __dir__)
+
+if ENV["MD_LOAD_MODE"] == "options"
+  $stdout.puts "⚙️ Run rubocop with '-r rubocop-md' options"
+elsif ENV["MD_LOAD_MODE"] == "config"
+  $stdout.puts "⚙️ Run rubocop with 'require: - rubocop-md' in .rubocop.yml"
+end
+
 require "rubocop"
 require "rubocop-md"