diff --git a/spec/bundler/commands/update_spec.rb b/spec/bundler/commands/update_spec.rb
index 2ad8d20a3b..cc1e01ba0b 100644
--- a/spec/bundler/commands/update_spec.rb
+++ b/spec/bundler/commands/update_spec.rb
@@ -1541,26 +1541,29 @@ RSpec.describe "bundle update --bundler" do
   end
 
   it "does not update the bundler version in the lockfile if the latest version is not compatible with current ruby", :ruby_repo do
-    pristine_system_gems "bundler-2.3.9"
+    pristine_system_gems "bundler-9.9.9"
 
     build_repo4 do
       build_gem "myrack", "1.0"
 
-      build_bundler "2.3.9"
+      build_bundler "9.9.9"
       build_bundler "999.0.0" do |s|
         s.required_ruby_version = "> #{Gem.ruby_version}"
       end
     end
 
-    install_gemfile <<-G, env: { "BUNDLER_IGNORE_DEFAULT_GEM" => "true" }
+    checksums = checksums_section do |c|
+      c.checksum(gem_repo4, "myrack", "1.0")
+    end
+
+    install_gemfile <<-G
       source "https://gem.repo4"
       gem "myrack"
     G
-    lockfile lockfile.sub(/(^\s*)#{Bundler::VERSION}($)/, "2.3.9")
 
-    bundle :update, bundler: true, artifice: "compact_index", verbose: true, env: { "BUNDLER_SPEC_GEM_REPO" => gem_repo4.to_s, "BUNDLER_IGNORE_DEFAULT_GEM" => "true" }
+    bundle :update, bundler: true, artifice: "compact_index", verbose: true, env: { "BUNDLER_SPEC_GEM_REPO" => gem_repo4.to_s }
 
-    expect(out).to include("Using bundler 2.3.9")
+    expect(out).to include("Using bundler 9.9.9")
 
     expect(lockfile).to eq <<~L
       GEM
@@ -1573,12 +1576,12 @@ RSpec.describe "bundle update --bundler" do
 
       DEPENDENCIES
         myrack
-
+      #{checksums}
       BUNDLED WITH
-         2.3.9
+         9.9.9
     L
 
-    expect(the_bundle).to include_gems "bundler 2.3.9"
+    expect(the_bundle).to include_gems "bundler 9.9.9"
     expect(the_bundle).to include_gems "myrack 1.0"
   end
 
diff --git a/spec/bundler/support/hax.rb b/spec/bundler/support/hax.rb
index c7fe3637cc..492c6ca8ed 100644
--- a/spec/bundler/support/hax.rb
+++ b/spec/bundler/support/hax.rb
@@ -36,18 +36,4 @@ module Gem
   if ENV["BUNDLER_SPEC_GEM_SOURCES"]
     self.sources = [ENV["BUNDLER_SPEC_GEM_SOURCES"]]
   end
-
-  if ENV["BUNDLER_IGNORE_DEFAULT_GEM"]
-    module RemoveDefaultBundlerStub
-      def default_stubs(pattern = "*")
-        super.delete_if {|stub| stub.name == "bundler" }
-      end
-    end
-
-    class Specification
-      class << self
-        prepend RemoveDefaultBundlerStub
-      end
-    end
-  end
 end
diff --git a/spec/bundler/support/helpers.rb b/spec/bundler/support/helpers.rb
index df3ce0b2bb..ef52e88eed 100644
--- a/spec/bundler/support/helpers.rb
+++ b/spec/bundler/support/helpers.rb
@@ -170,12 +170,8 @@ module Spec
         requires << "#{Path.spec_dir}/support/artifice/#{artifice}.rb"
       end
 
-      hax_path = "#{Path.spec_dir}/support/hax.rb"
+      requires << "#{Path.spec_dir}/support/hax.rb"
 
-      # For specs that need to ignore the default Bundler gem, load hax before
-      # anything else since other stuff may actually load bundler and not skip
-      # the default version
-      env.include?("BUNDLER_IGNORE_DEFAULT_GEM") ? requires.prepend(hax_path) : requires.append(hax_path)
       require_option = requires.map {|r| "-r#{r}" }
 
       [env, [Gem.ruby, *lib_option, *require_option].compact.join(" ")]