diff --git a/lib/bundler/cli/gem.rb b/lib/bundler/cli/gem.rb
index 79344314fe4..3f9432db3a8 100644
--- a/lib/bundler/cli/gem.rb
+++ b/lib/bundler/cli/gem.rb
@@ -288,7 +288,7 @@ module Bundler
       open_editor(options["edit"], target.join("#{name}.gemspec")) if options[:edit]
 
       Bundler.ui.info "\nGem '#{name}' was successfully created. " \
-        "For more information on making a RubyGem visit https://bundler.io/guides/creating_gem.html"
+        "For more information on making a RubyGem visit https://guides.rubygems.org/make-your-own-gem/"
     end
 
     private
diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index d9abc85d228..69842b4813f 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -988,6 +988,8 @@ module Bundler
         end
       end
 
+      sources.metadata_source.checksum_store.merge!(@locked_gems.metadata_source.checksum_store) if @locked_gems
+
       changes
     end
 
diff --git a/lib/bundler/installer/parallel_installer.rb b/lib/bundler/installer/parallel_installer.rb
index 020db30b844..fef326ed0a9 100644
--- a/lib/bundler/installer/parallel_installer.rb
+++ b/lib/bundler/installer/parallel_installer.rb
@@ -6,7 +6,7 @@ require_relative "gem_installer"
 module Bundler
   class ParallelInstaller
     class SpecInstallation
-      attr_accessor :spec, :name, :full_name, :post_install_message, :state, :error
+      attr_accessor :spec, :name, :full_name, :post_install_message, :state, :error, :dependencies
       def initialize(spec)
         @spec = spec
         @name = spec.name
@@ -46,25 +46,11 @@ module Bundler
         !post_install_message.empty?
       end
 
-      def ignorable_dependency?(dep)
-        dep.type == :development || dep.name == @name
-      end
-
-      # Checks installed dependencies against spec's dependencies to make
-      # sure needed dependencies have been installed.
+      # Recursively checks that all dependencies (direct and transitive) have been installed.
       def dependencies_installed?(installed_specs)
-        dependencies.all? {|d| installed_specs.include? d.name }
-      end
-
-      # Represents only the non-development dependencies, the ones that are
-      # itself and are in the total list.
-      def dependencies
-        @dependencies ||= all_dependencies.reject {|dep| ignorable_dependency? dep }
-      end
-
-      # Represents all dependencies
-      def all_dependencies
-        @spec.dependencies
+        dependencies.all? do |dep|
+          installed_specs.include?(dep.name) && dep.dependencies_installed?(installed_specs)
+        end
       end
 
       def to_s
@@ -85,6 +71,12 @@ module Bundler
       @force = force
       @local = local
       @specs = all_specs.map {|s| SpecInstallation.new(s) }
+      specs_by_name = @specs.to_h {|s| [s.name, s] }
+      @specs.each do |spec_install|
+        spec_install.dependencies = spec_install.spec.dependencies.filter_map do |dep|
+          specs_by_name[dep.name] unless dep.type == :development || dep.name == spec_install.name
+        end
+      end
       @specs.each do |spec_install|
         spec_install.state = :installed if skip.include?(spec_install.name)
       end if skip
diff --git a/lib/bundler/lockfile_generator.rb b/lib/bundler/lockfile_generator.rb
index 6b6cf9d9eae..2a3ad224805 100644
--- a/lib/bundler/lockfile_generator.rb
+++ b/lib/bundler/lockfile_generator.rb
@@ -71,7 +71,8 @@ module Bundler
       checksums = definition.resolve.map do |spec|
         spec.source.checksum_store.to_lock(spec)
       end
-      add_section("CHECKSUMS", checksums)
+
+      add_section("CHECKSUMS", checksums + bundler_checksum)
     end
 
     def add_locked_ruby_version
@@ -100,5 +101,19 @@ module Bundler
         raise ArgumentError, "#{value.inspect} can't be serialized in a lockfile"
       end
     end
+
+    def bundler_checksum
+      return [] if Bundler.gem_version.to_s.end_with?(".dev") || ENV["SKIP_BUNDLER_CHECKSUM"]
+
+      bundler_spec = definition.sources.metadata_source.specs.search(["bundler", Bundler.gem_version]).last
+      return [] unless File.exist?(bundler_spec.cache_file)
+
+      require "rubygems/package"
+
+      package = Gem::Package.new(bundler_spec.cache_file)
+      definition.sources.metadata_source.checksum_store.register(bundler_spec, Checksum.from_gem_package(package))
+
+      [definition.sources.metadata_source.checksum_store.to_lock(bundler_spec)]
+    end
   end
 end
diff --git a/lib/bundler/lockfile_parser.rb b/lib/bundler/lockfile_parser.rb
index ac0ce1ef3d0..a837f994cd9 100644
--- a/lib/bundler/lockfile_parser.rb
+++ b/lib/bundler/lockfile_parser.rb
@@ -28,6 +28,7 @@ module Bundler
 
     attr_reader(
       :sources,
+      :metadata_source,
       :dependencies,
       :specs,
       :platforms,
@@ -97,6 +98,7 @@ module Bundler
     def initialize(lockfile, strict: false)
       @platforms    = []
       @sources      = []
+      @metadata_source = Source::Metadata.new
       @dependencies = {}
       @parse_method = nil
       @specs        = {}
@@ -252,7 +254,12 @@ module Bundler
       version = Gem::Version.new(version)
       platform = platform ? Gem::Platform.new(platform) : Gem::Platform::RUBY
       full_name = Gem::NameTuple.new(name, version, platform).full_name
-      return unless spec = @specs[full_name]
+      spec = @specs[full_name]
+
+      if name == "bundler"
+        spec ||= LazySpecification.new(name, version, platform, @metadata_source)
+      end
+      return unless spec
 
       if checksums
         checksums.split(",") do |lock_checksum|
diff --git a/lib/bundler/man/bundle-add.1 b/lib/bundler/man/bundle-add.1
index 89771d34334..f49d8e568c9 100644
--- a/lib/bundler/man/bundle-add.1
+++ b/lib/bundler/man/bundle-add.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-ADD" "1" "March 2026" ""
+.TH "BUNDLE\-ADD" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-add\fR \- Add gem to the Gemfile and run bundle install
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-binstubs.1 b/lib/bundler/man/bundle-binstubs.1
index 2a78f530cce..9dbd4f1d3a1 100644
--- a/lib/bundler/man/bundle-binstubs.1
+++ b/lib/bundler/man/bundle-binstubs.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-BINSTUBS" "1" "March 2026" ""
+.TH "BUNDLE\-BINSTUBS" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-binstubs\fR \- Install the binstubs of the listed gems
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-cache.1 b/lib/bundler/man/bundle-cache.1
index a2b0fc6dff1..e2052ab0ac1 100644
--- a/lib/bundler/man/bundle-cache.1
+++ b/lib/bundler/man/bundle-cache.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CACHE" "1" "March 2026" ""
+.TH "BUNDLE\-CACHE" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-cache\fR \- Package your needed \fB\.gem\fR files into your application
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-check.1 b/lib/bundler/man/bundle-check.1
index d03b4dc6bdd..825a2889d57 100644
--- a/lib/bundler/man/bundle-check.1
+++ b/lib/bundler/man/bundle-check.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CHECK" "1" "March 2026" ""
+.TH "BUNDLE\-CHECK" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-check\fR \- Verifies if dependencies are satisfied by installed gems
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-clean.1 b/lib/bundler/man/bundle-clean.1
index 13bd586f486..0eae33d08d1 100644
--- a/lib/bundler/man/bundle-clean.1
+++ b/lib/bundler/man/bundle-clean.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CLEAN" "1" "March 2026" ""
+.TH "BUNDLE\-CLEAN" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-clean\fR \- Cleans up unused gems in your bundler directory
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-config.1 b/lib/bundler/man/bundle-config.1
index ed66ba9a481..b6df2ce77be 100644
--- a/lib/bundler/man/bundle-config.1
+++ b/lib/bundler/man/bundle-config.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CONFIG" "1" "March 2026" ""
+.TH "BUNDLE\-CONFIG" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-config\fR \- Set bundler configuration options
 .SH "SYNOPSIS"
@@ -172,7 +172,7 @@ Whether Bundler will install gems into the default system path (\fBGem\.dir\fR)\
 \fBplugins\fR (\fBBUNDLE_PLUGINS\fR)
 Enable Bundler's experimental plugin system\.
 .TP
-\fBprefer_patch\fR (BUNDLE_PREFER_PATCH)
+\fBprefer_patch\fR (\fBBUNDLE_PREFER_PATCH\fR)
 Prefer updating only to next patch version during updates\. Makes \fBbundle update\fR calls equivalent to \fBbundler update \-\-patch\fR\.
 .TP
 \fBredirect\fR (\fBBUNDLE_REDIRECT\fR)
diff --git a/lib/bundler/man/bundle-config.1.ronn b/lib/bundler/man/bundle-config.1.ronn
index b70293cfedd..81eb67326b9 100644
--- a/lib/bundler/man/bundle-config.1.ronn
+++ b/lib/bundler/man/bundle-config.1.ronn
@@ -223,7 +223,7 @@ learn more about their operation in [bundle install(1)](bundle-install.1.html).
    Whether Bundler will install gems into the default system path (`Gem.dir`).
 * `plugins` (`BUNDLE_PLUGINS`):
    Enable Bundler's experimental plugin system.
-* `prefer_patch` (BUNDLE_PREFER_PATCH):
+* `prefer_patch` (`BUNDLE_PREFER_PATCH`):
    Prefer updating only to next patch version during updates. Makes `bundle update` calls equivalent to `bundler update --patch`.
 * `redirect` (`BUNDLE_REDIRECT`):
    The number of redirects allowed for network requests. Defaults to `5`.
diff --git a/lib/bundler/man/bundle-console.1 b/lib/bundler/man/bundle-console.1
index 4594cb74be4..c86b90e3bd2 100644
--- a/lib/bundler/man/bundle-console.1
+++ b/lib/bundler/man/bundle-console.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CONSOLE" "1" "March 2026" ""
+.TH "BUNDLE\-CONSOLE" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-console\fR \- Open an IRB session with the bundle pre\-loaded
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-doctor.1 b/lib/bundler/man/bundle-doctor.1
index e94ebbd8342..fe9a8a35b9a 100644
--- a/lib/bundler/man/bundle-doctor.1
+++ b/lib/bundler/man/bundle-doctor.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-DOCTOR" "1" "March 2026" ""
+.TH "BUNDLE\-DOCTOR" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-doctor\fR \- Checks the bundle for common problems
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-env.1 b/lib/bundler/man/bundle-env.1
index c57bec014ef..29c4ac2a8e2 100644
--- a/lib/bundler/man/bundle-env.1
+++ b/lib/bundler/man/bundle-env.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-ENV" "1" "March 2026" ""
+.TH "BUNDLE\-ENV" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-env\fR \- Print information about the environment Bundler is running under
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-exec.1 b/lib/bundler/man/bundle-exec.1
index 36fed764aca..fec7bee39c3 100644
--- a/lib/bundler/man/bundle-exec.1
+++ b/lib/bundler/man/bundle-exec.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-EXEC" "1" "March 2026" ""
+.TH "BUNDLE\-EXEC" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-exec\fR \- Execute a command in the context of the bundle
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-fund.1 b/lib/bundler/man/bundle-fund.1
index 96f182e05f9..2eb07a6c8d8 100644
--- a/lib/bundler/man/bundle-fund.1
+++ b/lib/bundler/man/bundle-fund.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-FUND" "1" "March 2026" ""
+.TH "BUNDLE\-FUND" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-fund\fR \- Lists information about gems seeking funding assistance
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-gem.1 b/lib/bundler/man/bundle-gem.1
index 68c77a03ce1..bdb84faebdd 100644
--- a/lib/bundler/man/bundle-gem.1
+++ b/lib/bundler/man/bundle-gem.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-GEM" "1" "March 2026" ""
+.TH "BUNDLE\-GEM" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-gem\fR \- Generate a project skeleton for creating a rubygem
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-help.1 b/lib/bundler/man/bundle-help.1
index 17e1d4a9044..6e6ad14624d 100644
--- a/lib/bundler/man/bundle-help.1
+++ b/lib/bundler/man/bundle-help.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-HELP" "1" "March 2026" ""
+.TH "BUNDLE\-HELP" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-help\fR \- Displays detailed help for each subcommand
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-info.1 b/lib/bundler/man/bundle-info.1
index 50f5e36f18c..b18b70309c5 100644
--- a/lib/bundler/man/bundle-info.1
+++ b/lib/bundler/man/bundle-info.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-INFO" "1" "March 2026" ""
+.TH "BUNDLE\-INFO" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-info\fR \- Show information for the given gem in your bundle
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-init.1 b/lib/bundler/man/bundle-init.1
index 14fd0a73cb4..5ea1c3b4783 100644
--- a/lib/bundler/man/bundle-init.1
+++ b/lib/bundler/man/bundle-init.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-INIT" "1" "March 2026" ""
+.TH "BUNDLE\-INIT" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-init\fR \- Generates a Gemfile into the current working directory
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-install.1 b/lib/bundler/man/bundle-install.1
index 1d52335644f..c2f9bfeea1f 100644
--- a/lib/bundler/man/bundle-install.1
+++ b/lib/bundler/man/bundle-install.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-INSTALL" "1" "March 2026" ""
+.TH "BUNDLE\-INSTALL" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-install\fR \- Install the dependencies specified in your Gemfile
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-issue.1 b/lib/bundler/man/bundle-issue.1
index 7e2fcaf0fa5..e99cf67638f 100644
--- a/lib/bundler/man/bundle-issue.1
+++ b/lib/bundler/man/bundle-issue.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-ISSUE" "1" "March 2026" ""
+.TH "BUNDLE\-ISSUE" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-issue\fR \- Get help reporting Bundler issues
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-licenses.1 b/lib/bundler/man/bundle-licenses.1
index 9170fecd735..eb5f7203ec1 100644
--- a/lib/bundler/man/bundle-licenses.1
+++ b/lib/bundler/man/bundle-licenses.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-LICENSES" "1" "March 2026" ""
+.TH "BUNDLE\-LICENSES" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-licenses\fR \- Print the license of all gems in the bundle
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-list.1 b/lib/bundler/man/bundle-list.1
index 165a99bb58a..69276822d2c 100644
--- a/lib/bundler/man/bundle-list.1
+++ b/lib/bundler/man/bundle-list.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-LIST" "1" "March 2026" ""
+.TH "BUNDLE\-LIST" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-list\fR \- List all the gems in the bundle
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-lock.1 b/lib/bundler/man/bundle-lock.1
index 426e80ec77e..ba1915af2e1 100644
--- a/lib/bundler/man/bundle-lock.1
+++ b/lib/bundler/man/bundle-lock.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-LOCK" "1" "March 2026" ""
+.TH "BUNDLE\-LOCK" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-lock\fR \- Creates / Updates a lockfile without installing
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-open.1 b/lib/bundler/man/bundle-open.1
index caeb2238443..99166e8580f 100644
--- a/lib/bundler/man/bundle-open.1
+++ b/lib/bundler/man/bundle-open.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-OPEN" "1" "March 2026" ""
+.TH "BUNDLE\-OPEN" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-open\fR \- Opens the source directory for a gem in your bundle
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-outdated.1 b/lib/bundler/man/bundle-outdated.1
index 7363e27584b..8cdb5a892b9 100644
--- a/lib/bundler/man/bundle-outdated.1
+++ b/lib/bundler/man/bundle-outdated.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-OUTDATED" "1" "March 2026" ""
+.TH "BUNDLE\-OUTDATED" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-outdated\fR \- List installed gems with newer versions available
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-platform.1 b/lib/bundler/man/bundle-platform.1
index b859ead72f8..486e2d4406b 100644
--- a/lib/bundler/man/bundle-platform.1
+++ b/lib/bundler/man/bundle-platform.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-PLATFORM" "1" "March 2026" ""
+.TH "BUNDLE\-PLATFORM" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-platform\fR \- Displays platform compatibility information
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-plugin.1 b/lib/bundler/man/bundle-plugin.1
index 450d3e0862e..1c3feead763 100644
--- a/lib/bundler/man/bundle-plugin.1
+++ b/lib/bundler/man/bundle-plugin.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-PLUGIN" "1" "March 2026" ""
+.TH "BUNDLE\-PLUGIN" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-plugin\fR \- Manage Bundler plugins
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-pristine.1 b/lib/bundler/man/bundle-pristine.1
index f8722bff3ea..cbfc51399a7 100644
--- a/lib/bundler/man/bundle-pristine.1
+++ b/lib/bundler/man/bundle-pristine.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-PRISTINE" "1" "March 2026" ""
+.TH "BUNDLE\-PRISTINE" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-pristine\fR \- Restores installed gems to their pristine condition
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-remove.1 b/lib/bundler/man/bundle-remove.1
index df00b8dbdcf..f8981f9fcfc 100644
--- a/lib/bundler/man/bundle-remove.1
+++ b/lib/bundler/man/bundle-remove.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-REMOVE" "1" "March 2026" ""
+.TH "BUNDLE\-REMOVE" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-remove\fR \- Removes gems from the Gemfile
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-show.1 b/lib/bundler/man/bundle-show.1
index 4f6109a4a6c..aaf146fa271 100644
--- a/lib/bundler/man/bundle-show.1
+++ b/lib/bundler/man/bundle-show.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-SHOW" "1" "March 2026" ""
+.TH "BUNDLE\-SHOW" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-show\fR \- Shows all the gems in your bundle, or the path to a gem
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-update.1 b/lib/bundler/man/bundle-update.1
index 9e6076a2c2b..e5f18f2a1e2 100644
--- a/lib/bundler/man/bundle-update.1
+++ b/lib/bundler/man/bundle-update.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-UPDATE" "1" "March 2026" ""
+.TH "BUNDLE\-UPDATE" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-update\fR \- Update your gems to the latest available versions
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle-version.1 b/lib/bundler/man/bundle-version.1
index bc0cf692b3d..24b5dcef45d 100644
--- a/lib/bundler/man/bundle-version.1
+++ b/lib/bundler/man/bundle-version.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-VERSION" "1" "March 2026" ""
+.TH "BUNDLE\-VERSION" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\-version\fR \- Prints Bundler version information
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/bundle.1 b/lib/bundler/man/bundle.1
index c69f0e26bc6..492de63295a 100644
--- a/lib/bundler/man/bundle.1
+++ b/lib/bundler/man/bundle.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE" "1" "March 2026" ""
+.TH "BUNDLE" "1" "April 2026" ""
 .SH "NAME"
 \fBbundle\fR \- Ruby Dependency Management
 .SH "SYNOPSIS"
diff --git a/lib/bundler/man/gemfile.5 b/lib/bundler/man/gemfile.5
index 2818b122103..db04250b8b8 100644
--- a/lib/bundler/man/gemfile.5
+++ b/lib/bundler/man/gemfile.5
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "GEMFILE" "5" "March 2026" ""
+.TH "GEMFILE" "5" "April 2026" ""
 .SH "NAME"
 \fBGemfile\fR \- A format for describing gem dependencies for Ruby programs
 .SH "SYNOPSIS"
diff --git a/lib/bundler/source/metadata.rb b/lib/bundler/source/metadata.rb
index fd959cd64ee..ecf88951871 100644
--- a/lib/bundler/source/metadata.rb
+++ b/lib/bundler/source/metadata.rb
@@ -58,6 +58,10 @@ module Bundler
       def version_message(spec)
         "#{spec.name} #{spec.version}"
       end
+
+      def checksum_store
+        @checksum_store ||= Checksum::Store.new
+      end
     end
   end
 end
diff --git a/lib/bundler/source/rubygems.rb b/lib/bundler/source/rubygems.rb
index 5a77d6448eb..4fb35c18bf4 100644
--- a/lib/bundler/source/rubygems.rb
+++ b/lib/bundler/source/rubygems.rb
@@ -508,7 +508,7 @@ module Bundler
 
       # We are using a mutex to reaed and write from/to the hash.
       # The reason this double synchronization was added is for performance
-      # and lock the mutex for the shortest possible amount of time. Otherwise,
+      # and to lock the mutex for the shortest possible amount of time. Otherwise,
       # all threads are fighting over this mutex and when it gets acquired it gets locked
       # until a threads finishes downloading a gem, leaving the other threads waiting
       # doing nothing.
diff --git a/lib/bundler/templates/newgem/newgem.gemspec.tt b/lib/bundler/templates/newgem/newgem.gemspec.tt
index c705f9eac0c..b81ecec624a 100644
--- a/lib/bundler/templates/newgem/newgem.gemspec.tt
+++ b/lib/bundler/templates/newgem/newgem.gemspec.tt
@@ -22,6 +22,12 @@ Gem::Specification.new do |spec|
   spec.metadata["changelog_uri"] = "<%= config[:changelog_uri] %>"
 <%- end -%>
 
+  # Uncomment the line below to require MFA for gem pushes.
+  # This helps protect your gem from supply chain attacks by ensuring
+  # no one can publish a new version without multi-factor authentication.
+  # See: https://guides.rubygems.org/mfa-requirement-opt-in/
+  # spec.metadata["rubygems_mfa_required"] = "true"
+
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
   gemspec = File.basename(__FILE__)
@@ -48,5 +54,5 @@ Gem::Specification.new do |spec|
 <%- end -%>
 
   # For more information and examples about making a new gem, check out our
-  # guide at: https://bundler.io/guides/creating_gem.html
+  # guide at: https://guides.rubygems.org/make-your-own-gem/
 end
diff --git a/lib/bundler/version.rb b/lib/bundler/version.rb
index 7279965f704..e8b442674a6 100644
--- a/lib/bundler/version.rb
+++ b/lib/bundler/version.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: false
 
 module Bundler
-  VERSION = "4.0.10".freeze
+  VERSION = "4.0.11".freeze
 
   def self.bundler_major_version
     @bundler_major_version ||= gem_version.segments.first
diff --git a/lib/rubygems.rb b/lib/rubygems.rb
index d9d0fefdf83..d9da84ed3b1 100644
--- a/lib/rubygems.rb
+++ b/lib/rubygems.rb
@@ -9,7 +9,7 @@
 require "rbconfig"
 
 module Gem
-  VERSION = "4.0.10"
+  VERSION = "4.0.11"
 end
 
 require_relative "rubygems/defaults"
diff --git a/lib/rubygems/commands/specification_command.rb b/lib/rubygems/commands/specification_command.rb
index a21ed35be31..7831f6fdbd6 100644
--- a/lib/rubygems/commands/specification_command.rb
+++ b/lib/rubygems/commands/specification_command.rb
@@ -42,7 +42,7 @@ class Gem::Commands::SpecificationCommand < Gem::Command
 
   def arguments # :nodoc:
     <<-ARGS
-GEMFILE       name of gem to show the gemspec for
+GEM_OR_FILE   gem name or a .gem file to show the gemspec for
 FIELD         name of gemspec field to show
     ARGS
   end
@@ -68,7 +68,7 @@ Specific fields in the specification can be extracted in YAML format:
   end
 
   def usage # :nodoc:
-    "#{program_name} [GEMFILE] [FIELD]"
+    "#{program_name} [GEM_OR_FILE] [FIELD]"
   end
 
   def execute
@@ -77,7 +77,7 @@ Specific fields in the specification can be extracted in YAML format:
 
     unless gem
       raise Gem::CommandLineError,
-            "Please specify a gem name or file on the command line"
+            "Please specify a gem name or a .gem file on the command line"
     end
 
     case v = options[:version]
diff --git a/spec/bundler/bundler/installer/spec_installation_spec.rb b/spec/bundler/bundler/installer/spec_installation_spec.rb
index cbe2589b99b..57868766d9b 100644
--- a/spec/bundler/bundler/installer/spec_installation_spec.rb
+++ b/spec/bundler/bundler/installer/spec_installation_spec.rb
@@ -3,18 +3,17 @@
 require "bundler/installer/parallel_installer"
 
 RSpec.describe Bundler::ParallelInstaller::SpecInstallation do
-  let!(:dep) do
-    a_spec = Object.new
-    def a_spec.name
-      "I like tests"
-    end
-
-    def a_spec.full_name
-      "I really like tests"
-    end
-    a_spec
+  def build_spec(name, extensions: [])
+    spec = Object.new
+    spec.define_singleton_method(:name) { name }
+    spec.define_singleton_method(:full_name) { "#{name}-1.0" }
+    spec.define_singleton_method(:extensions) { extensions }
+    spec.define_singleton_method(:dependencies) { [] }
+    spec
   end
 
+  let!(:dep) { build_spec("I like tests") }
+
   describe "#ready_to_enqueue?" do
     context "when in enqueued state" do
       it "is falsey" do
@@ -39,29 +38,51 @@ RSpec.describe Bundler::ParallelInstaller::SpecInstallation do
   end
 
   describe "#dependencies_installed?" do
-    context "when all dependencies are installed" do
-      it "returns true" do
-        dependencies = []
-        dependencies << instance_double("SpecInstallation", spec: "alpha", name: "alpha", installed?: true, all_dependencies: [], type: :production)
-        dependencies << instance_double("SpecInstallation", spec: "beta", name: "beta", installed?: true, all_dependencies: [], type: :production)
-        all_specs = dependencies + [instance_double("SpecInstallation", spec: "gamma", name: "gamma", installed?: false, all_dependencies: [], type: :production)]
+    it "returns true when all dependencies are installed" do
+      alpha = described_class.new(build_spec("alpha"))
+      alpha.dependencies = []
+
+      beta = described_class.new(build_spec("beta"))
+      beta.dependencies = [alpha]
+
+      gamma = described_class.new(build_spec("gamma"))
+      gamma.dependencies = [beta]
+
+      expect(gamma.dependencies_installed?({})).to be_falsey
+      expect(gamma.dependencies_installed?({ "beta" => true })).to be_falsey
+      expect(gamma.dependencies_installed?({ "alpha" => true, "beta" => true })).to be_truthy
+    end
+  end
+
+  describe "#ready_to_install?" do
+    context "when spec has no extensions" do
+      it "returns true regardless of dependencies" do
+        beta = described_class.new(build_spec("beta"))
+        beta.dependencies = []
+
         spec = described_class.new(dep)
-        allow(spec).to receive(:all_dependencies).and_return(dependencies)
-        installed_specs = all_specs.select(&:installed?).map {|s| [s.name, true] }.to_h
-        expect(spec.dependencies_installed?(installed_specs)).to be_truthy
+        spec.state = :downloaded
+        spec.dependencies = [beta]
+
+        expect(spec.ready_to_install?({})).to be_truthy
       end
     end
 
-    context "when all dependencies are not installed" do
-      it "returns false" do
-        dependencies = []
-        dependencies << instance_double("SpecInstallation", spec: "alpha", name: "alpha", installed?: false, all_dependencies: [], type: :production)
-        dependencies << instance_double("SpecInstallation", spec: "beta", name: "beta", installed?: true, all_dependencies: [], type: :production)
-        all_specs = dependencies + [instance_double("SpecInstallation", spec: "gamma", name: "gamma", installed?: false, all_dependencies: [], type: :production)]
-        spec = described_class.new(dep)
-        allow(spec).to receive(:all_dependencies).and_return(dependencies)
-        installed_specs = all_specs.select(&:installed?).map {|s| [s.name, true] }.to_h
-        expect(spec.dependencies_installed?(installed_specs)).to be_falsey
+    context "when spec has extensions" do
+      it "returns true when all dependencies are installed" do
+        alpha = described_class.new(build_spec("alpha"))
+        alpha.dependencies = []
+
+        beta = described_class.new(build_spec("beta"))
+        beta.dependencies = [alpha]
+
+        gamma = described_class.new(build_spec("gamma", extensions: ["ext/Rakefile"]))
+        gamma.state = :downloaded
+        gamma.dependencies = [beta]
+
+        expect(gamma.ready_to_install?({})).to be_falsey
+        expect(gamma.ready_to_install?({ "beta" => true })).to be_falsey
+        expect(gamma.ready_to_install?({ "alpha" => true, "beta" => true })).to be_truthy
       end
     end
   end
diff --git a/spec/bundler/commands/install_spec.rb b/spec/bundler/commands/install_spec.rb
index ae651bf981c..3c68c2cb30d 100644
--- a/spec/bundler/commands/install_spec.rb
+++ b/spec/bundler/commands/install_spec.rb
@@ -1379,6 +1379,48 @@ RSpec.describe "bundle install with gem sources" do
     end
   end
 
+  describe "when a native extension requires a transitive dependency at build time" do
+    before do
+      build_repo4 do
+        build_gem "alpha", "1.0.0" do |s|
+          extension = "ext/alpha/extconf.rb"
+          s.extensions = extension
+          s.write(extension, <<~CODE)
+            require "mkmf"
+            sleep 1
+            create_makefile("alpha")
+          CODE
+          s.write "lib/alpha.rb", "ALPHA = '1.0.0'"
+        end
+
+        build_gem "beta", "1.0.0" do |s|
+          s.add_dependency "alpha"
+          s.write "lib/beta.rb", "require 'alpha'\nBETA = '1.0.0'"
+        end
+
+        build_gem "gamma", "1.0.0" do |s|
+          s.add_dependency "beta"
+          extension = "ext/gamma/extconf.rb"
+          s.extensions = extension
+          s.write(extension, <<~EXTCONF)
+            require "beta"
+            require "mkmf"
+            create_makefile("gamma")
+          EXTCONF
+        end
+      end
+    end
+
+    it "installs successfully" do
+      install_gemfile <<~G
+        source "https://gem.repo4"
+        gem "gamma"
+      G
+
+      expect(the_bundle).to include_gems "alpha 1.0.0", "beta 1.0.0", "gamma 1.0.0"
+    end
+  end
+
   describe "when configured path is UTF-8 and a file inside a gem package too" do
     let(:app_path) do
       path = tmp("♥")
diff --git a/spec/bundler/commands/lock_spec.rb b/spec/bundler/commands/lock_spec.rb
index c8af9c8dd40..f7705740f00 100644
--- a/spec/bundler/commands/lock_spec.rb
+++ b/spec/bundler/commands/lock_spec.rb
@@ -2295,6 +2295,10 @@ RSpec.describe "bundle lock" do
 
     bundle("lock --add-checksums", artifice: "endpoint")
 
+    checksums = checksums_section_when_enabled do |c|
+      c.no_checksum "warning", "18.0.0"
+    end
+
     expect(lockfile).to eq <<~L
       GEM
         remote: https://gem.repo4/
@@ -2306,10 +2310,7 @@ RSpec.describe "bundle lock" do
 
       DEPENDENCIES
         warning
-
-      CHECKSUMS
-        warning (18.0.0)
-
+      #{checksums}
       BUNDLED WITH
         #{Bundler::VERSION}
     L
diff --git a/spec/bundler/commands/newgem_spec.rb b/spec/bundler/commands/newgem_spec.rb
index 7a6c05fbb0e..281c7a0ddd3 100644
--- a/spec/bundler/commands/newgem_spec.rb
+++ b/spec/bundler/commands/newgem_spec.rb
@@ -645,6 +645,15 @@ RSpec.describe "bundle gem" do
       to match(/example\.com/)
   end
 
+  it "includes a commented-out rubygems_mfa_required metadata hint" do
+    bundle "gem #{gem_name}"
+
+    gemspec_contents = bundled_app("#{gem_name}/#{gem_name}.gemspec").read
+
+    expect(gemspec_contents).to include('# spec.metadata["rubygems_mfa_required"] = "true"')
+    expect(gemspec_contents).to include("https://guides.rubygems.org/mfa-requirement-opt-in/")
+  end
+
   it "sets a minimum ruby version" do
     bundle "gem #{gem_name}"
 
diff --git a/spec/bundler/commands/update_spec.rb b/spec/bundler/commands/update_spec.rb
index cdaeb75c4a3..d30eef4c61f 100644
--- a/spec/bundler/commands/update_spec.rb
+++ b/spec/bundler/commands/update_spec.rb
@@ -1419,9 +1419,7 @@ RSpec.describe "bundle update --ruby" do
          #{lockfile_platforms}
 
        DEPENDENCIES
-
-       CHECKSUMS
-
+       #{checksums_section_when_enabled}
        RUBY VERSION
          #{Bundler::RubyVersion.system}
 
@@ -1537,6 +1535,7 @@ RSpec.describe "bundle update --bundler" do
 
     checksums = checksums_section do |c|
       c.checksum(gem_repo4, "myrack", "1.0")
+      c.checksum(gem_repo4, "bundler", "999.0.0")
     end
 
     install_gemfile <<-G
@@ -1621,6 +1620,7 @@ RSpec.describe "bundle update --bundler" do
 
     checksums = checksums_section do |c|
       c.checksum(gem_repo4, "myrack", "1.0")
+      c.checksum(gem_repo4, "bundler", "9.9.9")
     end
 
     install_gemfile <<-G
@@ -1706,6 +1706,7 @@ RSpec.describe "bundle update --bundler" do
     checksums = checksums_section_when_enabled do |c|
       c.checksum(gem_repo4, "myrack", "1.0")
     end
+    checksums.delete("bundler")
 
     expect(lockfile).to eq <<~L
         GEM
@@ -1745,6 +1746,7 @@ RSpec.describe "bundle update --bundler" do
     # Only updates properly on modern RubyGems.
     checksums = checksums_section_when_enabled do |c|
       c.checksum(gem_repo4, "myrack", "1.0")
+      c.checksum(local_gem_path, "bundler", "9.0.0", Gem::Platform::RUBY, "cache")
     end
 
     expect(lockfile).to eq <<~L
diff --git a/spec/bundler/install/gemfile/git_spec.rb b/spec/bundler/install/gemfile/git_spec.rb
index d31e3f4ba31..89172fdf10a 100644
--- a/spec/bundler/install/gemfile/git_spec.rb
+++ b/spec/bundler/install/gemfile/git_spec.rb
@@ -478,7 +478,7 @@ RSpec.describe "bundle install with git sources" do
         update_git("foo", path: repo, tag: tag)
 
         install_gemfile <<-G
-         source "https://gem.repo1"
+          source "https://gem.repo1"
           git "#{repo}", :tag => #{tag.dump} do
             gem "foo"
           end
@@ -1078,7 +1078,7 @@ RSpec.describe "bundle install with git sources" do
     expect(out).to eq("WIN")
   end
 
-  it "does not to a remote fetch if the revision is cached locally" do
+  it "does not do a remote fetch if the revision is cached locally" do
     build_git "foo"
 
     install_gemfile <<-G
diff --git a/spec/bundler/install/gems/resolving_spec.rb b/spec/bundler/install/gems/resolving_spec.rb
index e6a395a6696..111d361aab9 100644
--- a/spec/bundler/install/gems/resolving_spec.rb
+++ b/spec/bundler/install/gems/resolving_spec.rb
@@ -358,7 +358,7 @@ RSpec.describe "bundle install with install-time dependencies" do
               #{lockfile_platforms}
 
             DEPENDENCIES
-              parallel_tests
+              rubocop
             #{checksums}
             BUNDLED WITH
               #{Bundler::VERSION}
diff --git a/spec/bundler/realworld/fixtures/tapioca/Gemfile.lock b/spec/bundler/realworld/fixtures/tapioca/Gemfile.lock
index c1de0f77696..bbaf8328d63 100644
--- a/spec/bundler/realworld/fixtures/tapioca/Gemfile.lock
+++ b/spec/bundler/realworld/fixtures/tapioca/Gemfile.lock
@@ -46,4 +46,4 @@ DEPENDENCIES
   tapioca
 
 BUNDLED WITH
-  4.0.10
+  4.0.11
diff --git a/spec/bundler/realworld/fixtures/warbler/Gemfile.lock b/spec/bundler/realworld/fixtures/warbler/Gemfile.lock
index a27690c5934..3c6fd521808 100644
--- a/spec/bundler/realworld/fixtures/warbler/Gemfile.lock
+++ b/spec/bundler/realworld/fixtures/warbler/Gemfile.lock
@@ -36,4 +36,4 @@ DEPENDENCIES
   warbler!
 
 BUNDLED WITH
-  4.0.10
+  4.0.11
diff --git a/spec/bundler/runtime/setup_spec.rb b/spec/bundler/runtime/setup_spec.rb
index 1ffaffef0ed..2cbb61dbff5 100644
--- a/spec/bundler/runtime/setup_spec.rb
+++ b/spec/bundler/runtime/setup_spec.rb
@@ -1283,7 +1283,12 @@ end
     end
 
     context "is not present" do
-      it "does not change the lock" do
+      # Skipped on ruby-core because `ruby "require 'bundler/setup'"` does not
+      # activate bundler as a gem there, so Source::Metadata falls back to a
+      # synthetic spec whose cache_file does not exist on disk and
+      # LockfileGenerator#bundler_checksum drops the bundler checksum, while
+      # the on-disk lockfile still has it.
+      it "does not change the lock", :ruby_repo do
         expect { ruby "require 'bundler/setup'" }.not_to change { lockfile }
       end
     end
@@ -1329,7 +1334,7 @@ end
         gem "bar", :git => "#{lib_path("bar-1.0")}"
       G
 
-      bundle :install
+      bundle :install, env: { "BUNDLE_LOCKFILE_CHECKSUMS" => "false" }
 
       ruby <<-RUBY, artifice: nil
         require 'bundler/setup'
diff --git a/spec/bundler/support/checksums.rb b/spec/bundler/support/checksums.rb
index cf8ea417d67..7b69bba6680 100644
--- a/spec/bundler/support/checksums.rb
+++ b/spec/bundler/support/checksums.rb
@@ -3,6 +3,8 @@
 module Spec
   module Checksums
     class ChecksumsBuilder
+      attr_reader :bundler_registered
+
       def initialize(enabled = true, &block)
         @enabled = enabled
         @checksums = {}
@@ -14,9 +16,11 @@ module Spec
         @checksums = @checksums.dup
       end
 
-      def checksum(repo, name, version, platform = Gem::Platform::RUBY)
+      def checksum(repo, name, version, platform = Gem::Platform::RUBY, folder = "gems")
+        @bundler_registered = true if name == "bundler"
+
         name_tuple = Gem::NameTuple.new(name, version, platform)
-        gem_file = File.join(repo, "gems", "#{name_tuple.full_name}.gem")
+        gem_file = File.join(repo, folder, "#{name_tuple.full_name}.gem")
         File.open(gem_file, "rb") do |f|
           register(name_tuple, Bundler::Checksum.from_gem(f, "#{gem_file} (via ChecksumsBuilder#checksum)"))
         end
@@ -50,8 +54,13 @@ module Spec
       end
     end
 
-    def checksums_section(enabled = true, &block)
-      ChecksumsBuilder.new(enabled, &block)
+    def checksums_section(enabled = true, bundler_checksum: true, &block)
+      ChecksumsBuilder.new(enabled, &block).tap do |builder|
+        next if builder.bundler_registered || !bundler_checksum
+
+        next if Bundler::VERSION.to_s.end_with?(".dev")
+        builder.checksum(system_gem_path, "bundler", Bundler::VERSION, Gem::Platform::RUBY, "cache")
+      end
     end
 
     def checksums_section_when_enabled(target_lockfile = nil, &block)
@@ -64,7 +73,7 @@ module Spec
     end
 
     def checksum_to_lock(*args)
-      checksums_section do |c|
+      checksums_section(true, bundler_checksum: false) do |c|
         c.checksum(*args)
       end.to_s.sub(/^CHECKSUMS\n/, "").strip
     end
diff --git a/test/rubygems/test_gem_commands_push_command.rb b/test/rubygems/test_gem_commands_push_command.rb
index 978ed3ada88..b862d0d96d0 100644
--- a/test/rubygems/test_gem_commands_push_command.rb
+++ b/test/rubygems/test_gem_commands_push_command.rb
@@ -148,7 +148,7 @@ class TestGemCommandsPushCommand < Gem::TestCase
       spec.metadata["allowed_push_host"] = "https://privategemserver.example"
     end
 
-    @response = "Successfully registered gem: freewill (1.0.0)"
+    @response = "Successfully registered gem: freebird (1.0.1)"
     @fetcher.data["#{@spec.metadata["allowed_push_host"]}/api/v1/gems"] = HTTPResponseFactory.create(body: @response, code: 200, msg: "OK")
     @fetcher.data["#{Gem.host}/api/v1/gems"] =
       ["fail", 500, "Internal Server Error"]
diff --git a/test/rubygems/test_gem_stub_specification.rb b/test/rubygems/test_gem_stub_specification.rb
index f04b36dbf86..6c07480c7fd 100644
--- a/test/rubygems/test_gem_stub_specification.rb
+++ b/test/rubygems/test_gem_stub_specification.rb
@@ -221,7 +221,7 @@ class TestStubSpecification < Gem::TestCase
   end
 
   def stub_with_version
-    spec = File.join @gemhome, "specifications", "stub_e-2.gemspec"
+    spec = File.join @gemhome, "specifications", "stub_v-with-version.gemspec"
     File.open spec, "w" do |io|
       io.write <<~STUB
         # -*- encoding: utf-8 -*-
@@ -244,7 +244,7 @@ class TestStubSpecification < Gem::TestCase
   end
 
   def stub_without_version
-    spec = File.join @gemhome, "specifications", "stub-2.gemspec"
+    spec = File.join @gemhome, "specifications", "stub_v-without-version.gemspec"
     File.open spec, "w" do |io|
       io.write <<~STUB
         # -*- encoding: utf-8 -*-
diff --git a/tool/bundler/dev_gems.rb.lock b/tool/bundler/dev_gems.rb.lock
index f6c13704adb..b2d1783acb3 100644
--- a/tool/bundler/dev_gems.rb.lock
+++ b/tool/bundler/dev_gems.rb.lock
@@ -129,4 +129,4 @@ CHECKSUMS
   turbo_tests (2.2.5) sha256=3fa31497d12976d11ccc298add29107b92bda94a90d8a0a5783f06f05102509f
 
 BUNDLED WITH
-  4.0.10
+  4.0.11
diff --git a/tool/bundler/rubocop_gems.rb.lock b/tool/bundler/rubocop_gems.rb.lock
index 422a8869114..2893c91a2ca 100644
--- a/tool/bundler/rubocop_gems.rb.lock
+++ b/tool/bundler/rubocop_gems.rb.lock
@@ -156,4 +156,4 @@ CHECKSUMS
   unicode-emoji (4.2.0) sha256=519e69150f75652e40bf736106cfbc8f0f73aa3fb6a65afe62fefa7f80b0f80f
 
 BUNDLED WITH
-  4.0.10
+  4.0.11
diff --git a/tool/bundler/standard_gems.rb.lock b/tool/bundler/standard_gems.rb.lock
index bbc83b79ce2..285bafab744 100644
--- a/tool/bundler/standard_gems.rb.lock
+++ b/tool/bundler/standard_gems.rb.lock
@@ -176,4 +176,4 @@ CHECKSUMS
   unicode-emoji (4.2.0) sha256=519e69150f75652e40bf736106cfbc8f0f73aa3fb6a65afe62fefa7f80b0f80f
 
 BUNDLED WITH
-  4.0.10
+  4.0.11
diff --git a/tool/bundler/test_gems.rb.lock b/tool/bundler/test_gems.rb.lock
index 0688ecb31b4..031216b465a 100644
--- a/tool/bundler/test_gems.rb.lock
+++ b/tool/bundler/test_gems.rb.lock
@@ -103,4 +103,4 @@ CHECKSUMS
   tilt (2.6.1) sha256=35a99bba2adf7c1e362f5b48f9b581cce4edfba98117e34696dde6d308d84770
 
 BUNDLED WITH
-  4.0.10
+  4.0.11