diff --git a/bundler/lib/bundler/cli.rb b/bundler/lib/bundler/cli.rb
index d93feb7b55ce..1fd55814604d 100644
--- a/bundler/lib/bundler/cli.rb
+++ b/bundler/lib/bundler/cli.rb
@@ -657,6 +657,7 @@ def issue
       gem cache. Gems installed from a git repository will be issued `git
       checkout --force`.
     D
+    method_option "gemfile", type: :string, banner: "Use the specified gemfile instead of Gemfile"
     def pristine(*gems)
       require_relative "cli/pristine"
       Bundler.settings.temporary(no_install: false) do
diff --git a/bundler/lib/bundler/man/bundle-add.1 b/bundler/lib/bundler/man/bundle-add.1
index 210911dcf446..7e209df4ff3a 100644
--- a/bundler/lib/bundler/man/bundle-add.1
+++ b/bundler/lib/bundler/man/bundle-add.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-ADD" "1" "December 2023" ""
+.TH "BUNDLE\-ADD" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-add\fR \- Add gem to the Gemfile and run bundle install
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-binstubs.1 b/bundler/lib/bundler/man/bundle-binstubs.1
index b71347d6e1d9..9c6d8496f19e 100644
--- a/bundler/lib/bundler/man/bundle-binstubs.1
+++ b/bundler/lib/bundler/man/bundle-binstubs.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-BINSTUBS" "1" "December 2023" ""
+.TH "BUNDLE\-BINSTUBS" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-binstubs\fR \- Install the binstubs of the listed gems
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-cache.1 b/bundler/lib/bundler/man/bundle-cache.1
index 5f03c38abe8d..1c67bfc7a984 100644
--- a/bundler/lib/bundler/man/bundle-cache.1
+++ b/bundler/lib/bundler/man/bundle-cache.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-CACHE" "1" "December 2023" ""
+.TH "BUNDLE\-CACHE" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-cache\fR \- Package your needed \fB\.gem\fR files into your application
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-check.1 b/bundler/lib/bundler/man/bundle-check.1
index bc24dfe2b279..5889c945d1e1 100644
--- a/bundler/lib/bundler/man/bundle-check.1
+++ b/bundler/lib/bundler/man/bundle-check.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-CHECK" "1" "December 2023" ""
+.TH "BUNDLE\-CHECK" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-check\fR \- Verifies if dependencies are satisfied by installed gems
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-clean.1 b/bundler/lib/bundler/man/bundle-clean.1
index 00787da5f100..0d7d18802137 100644
--- a/bundler/lib/bundler/man/bundle-clean.1
+++ b/bundler/lib/bundler/man/bundle-clean.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-CLEAN" "1" "December 2023" ""
+.TH "BUNDLE\-CLEAN" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-clean\fR \- Cleans up unused gems in your bundler directory
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-config.1 b/bundler/lib/bundler/man/bundle-config.1
index 8090e03f7df1..83d813183bdd 100644
--- a/bundler/lib/bundler/man/bundle-config.1
+++ b/bundler/lib/bundler/man/bundle-config.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-CONFIG" "1" "December 2023" ""
+.TH "BUNDLE\-CONFIG" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-config\fR \- Set bundler configuration options
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-console.1 b/bundler/lib/bundler/man/bundle-console.1
index 14e5f55647fe..a37171c6dffc 100644
--- a/bundler/lib/bundler/man/bundle-console.1
+++ b/bundler/lib/bundler/man/bundle-console.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-CONSOLE" "1" "December 2023" ""
+.TH "BUNDLE\-CONSOLE" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-console\fR \- Deprecated way to open an IRB session with the bundle pre\-loaded
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-doctor.1 b/bundler/lib/bundler/man/bundle-doctor.1
index aea8bacdad93..bb6fbc2b4f52 100644
--- a/bundler/lib/bundler/man/bundle-doctor.1
+++ b/bundler/lib/bundler/man/bundle-doctor.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-DOCTOR" "1" "December 2023" ""
+.TH "BUNDLE\-DOCTOR" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-doctor\fR \- Checks the bundle for common problems
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-exec.1 b/bundler/lib/bundler/man/bundle-exec.1
index af622f4423e7..73a54055b6df 100644
--- a/bundler/lib/bundler/man/bundle-exec.1
+++ b/bundler/lib/bundler/man/bundle-exec.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-EXEC" "1" "December 2023" ""
+.TH "BUNDLE\-EXEC" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-exec\fR \- Execute a command in the context of the bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-gem.1 b/bundler/lib/bundler/man/bundle-gem.1
index bc62a883ea2a..89a0f1cc9131 100644
--- a/bundler/lib/bundler/man/bundle-gem.1
+++ b/bundler/lib/bundler/man/bundle-gem.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-GEM" "1" "December 2023" ""
+.TH "BUNDLE\-GEM" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-gem\fR \- Generate a project skeleton for creating a rubygem
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-help.1 b/bundler/lib/bundler/man/bundle-help.1
index 3e6d7a851ea2..1e937f595a4b 100644
--- a/bundler/lib/bundler/man/bundle-help.1
+++ b/bundler/lib/bundler/man/bundle-help.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-HELP" "1" "December 2023" ""
+.TH "BUNDLE\-HELP" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-help\fR \- Displays detailed help for each subcommand
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-info.1 b/bundler/lib/bundler/man/bundle-info.1
index 43cc7d23b64f..683bd4da64eb 100644
--- a/bundler/lib/bundler/man/bundle-info.1
+++ b/bundler/lib/bundler/man/bundle-info.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-INFO" "1" "December 2023" ""
+.TH "BUNDLE\-INFO" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-info\fR \- Show information for the given gem in your bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-init.1 b/bundler/lib/bundler/man/bundle-init.1
index 9c6f89a6b2ae..99199308cd9f 100644
--- a/bundler/lib/bundler/man/bundle-init.1
+++ b/bundler/lib/bundler/man/bundle-init.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-INIT" "1" "December 2023" ""
+.TH "BUNDLE\-INIT" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-init\fR \- Generates a Gemfile into the current working directory
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-inject.1 b/bundler/lib/bundler/man/bundle-inject.1
index f8c4d4342e0b..0598fa68eb01 100644
--- a/bundler/lib/bundler/man/bundle-inject.1
+++ b/bundler/lib/bundler/man/bundle-inject.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-INJECT" "1" "December 2023" ""
+.TH "BUNDLE\-INJECT" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-inject\fR \- Add named gem(s) with version requirements to Gemfile
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-install.1 b/bundler/lib/bundler/man/bundle-install.1
index a23763889b50..af46f4312a08 100644
--- a/bundler/lib/bundler/man/bundle-install.1
+++ b/bundler/lib/bundler/man/bundle-install.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-INSTALL" "1" "December 2023" ""
+.TH "BUNDLE\-INSTALL" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-install\fR \- Install the dependencies specified in your Gemfile
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-list.1 b/bundler/lib/bundler/man/bundle-list.1
index 943f17ab839d..68c4d513a009 100644
--- a/bundler/lib/bundler/man/bundle-list.1
+++ b/bundler/lib/bundler/man/bundle-list.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-LIST" "1" "December 2023" ""
+.TH "BUNDLE\-LIST" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-list\fR \- List all the gems in the bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-lock.1 b/bundler/lib/bundler/man/bundle-lock.1
index 041c2d739ed2..f2102f5ed0e5 100644
--- a/bundler/lib/bundler/man/bundle-lock.1
+++ b/bundler/lib/bundler/man/bundle-lock.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-LOCK" "1" "December 2023" ""
+.TH "BUNDLE\-LOCK" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-lock\fR \- Creates / Updates a lockfile without installing
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-open.1 b/bundler/lib/bundler/man/bundle-open.1
index a349288987ce..04a963d32343 100644
--- a/bundler/lib/bundler/man/bundle-open.1
+++ b/bundler/lib/bundler/man/bundle-open.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-OPEN" "1" "December 2023" ""
+.TH "BUNDLE\-OPEN" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-open\fR \- Opens the source directory for a gem in your bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-outdated.1 b/bundler/lib/bundler/man/bundle-outdated.1
index a501fec83ebd..93b0e99c7bda 100644
--- a/bundler/lib/bundler/man/bundle-outdated.1
+++ b/bundler/lib/bundler/man/bundle-outdated.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-OUTDATED" "1" "December 2023" ""
+.TH "BUNDLE\-OUTDATED" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-outdated\fR \- List installed gems with newer versions available
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-platform.1 b/bundler/lib/bundler/man/bundle-platform.1
index 2ff1938585d0..1c136ea50d3a 100644
--- a/bundler/lib/bundler/man/bundle-platform.1
+++ b/bundler/lib/bundler/man/bundle-platform.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-PLATFORM" "1" "December 2023" ""
+.TH "BUNDLE\-PLATFORM" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-platform\fR \- Displays platform compatibility information
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-plugin.1 b/bundler/lib/bundler/man/bundle-plugin.1
index 09e0d816acef..5e6f058fa43d 100644
--- a/bundler/lib/bundler/man/bundle-plugin.1
+++ b/bundler/lib/bundler/man/bundle-plugin.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-PLUGIN" "1" "December 2023" ""
+.TH "BUNDLE\-PLUGIN" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-plugin\fR \- Manage Bundler plugins
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-pristine.1 b/bundler/lib/bundler/man/bundle-pristine.1
index 60609f4ee802..5c8a6a53481e 100644
--- a/bundler/lib/bundler/man/bundle-pristine.1
+++ b/bundler/lib/bundler/man/bundle-pristine.1
@@ -1,10 +1,10 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-PRISTINE" "1" "December 2023" ""
+.TH "BUNDLE\-PRISTINE" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-pristine\fR \- Restores installed gems to their pristine condition
 .SH "SYNOPSIS"
-\fBbundle pristine\fR
+\fBbundle pristine\fR [\-\-gemfile=GEMFILE]
 .SH "DESCRIPTION"
 \fBpristine\fR restores the installed gems in the bundle to their pristine condition using the local gem cache from RubyGems\. For git gems, a forced checkout will be performed\.
 .P
@@ -21,3 +21,8 @@ Why use \fBbundle pristine\fR over \fBgem pristine \-\-all\fR?
 Both commands are very similar\. For context: \fBbundle pristine\fR, without arguments, cleans all gems from the lockfile\. Meanwhile, \fBgem pristine \-\-all\fR cleans all installed gems for that Ruby version\.
 .P
 If a developer forgets which gems in their project they might have been debugging, the Rubygems \fBgem pristine [GEMNAME]\fR command may be inconvenient\. One can avoid waiting for \fBgem pristine \-\-all\fR, and instead run \fBbundle pristine\fR\.
+.SH "OPTIONS"
+.TP
+\fB\-\-gemfile=<gemfile>\fR
+The location of the Gemfile(5) which Bundler should use\. This defaults to a Gemfile(5) in the current working directory\. In general, Bundler will assume that the location of the Gemfile(5) is also the project's root and will try to find \fBGemfile\.lock\fR and \fBvendor/cache\fR relative to this location\.
+
diff --git a/bundler/lib/bundler/man/bundle-pristine.1.ronn b/bundler/lib/bundler/man/bundle-pristine.1.ronn
index e2d6b6a348f0..f09c8fc4a6f3 100644
--- a/bundler/lib/bundler/man/bundle-pristine.1.ronn
+++ b/bundler/lib/bundler/man/bundle-pristine.1.ronn
@@ -3,7 +3,7 @@ bundle-pristine(1) -- Restores installed gems to their pristine condition
 
 ## SYNOPSIS
 
-`bundle pristine`
+`bundle pristine` [--gemfile=GEMFILE]
 
 ## DESCRIPTION
 
@@ -32,3 +32,12 @@ Meanwhile, `gem pristine --all` cleans all installed gems for that Ruby version.
 If a developer forgets which gems in their project they might
 have been debugging, the Rubygems `gem pristine [GEMNAME]` command may be inconvenient.
 One can avoid waiting for `gem pristine --all`, and instead run `bundle pristine`.
+
+## OPTIONS
+
+* `--gemfile=<gemfile>`:
+  The location of the Gemfile(5) which Bundler should use. This defaults
+  to a Gemfile(5) in the current working directory. In general, Bundler
+  will assume that the location of the Gemfile(5) is also the project's
+  root and will try to find `Gemfile.lock` and `vendor/cache` relative
+  to this location.
\ No newline at end of file
diff --git a/bundler/lib/bundler/man/bundle-remove.1 b/bundler/lib/bundler/man/bundle-remove.1
index 31eae269c88e..5a0cd8ca1dac 100644
--- a/bundler/lib/bundler/man/bundle-remove.1
+++ b/bundler/lib/bundler/man/bundle-remove.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-REMOVE" "1" "December 2023" ""
+.TH "BUNDLE\-REMOVE" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-remove\fR \- Removes gems from the Gemfile
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-show.1 b/bundler/lib/bundler/man/bundle-show.1
index 761629c62579..dec369747c41 100644
--- a/bundler/lib/bundler/man/bundle-show.1
+++ b/bundler/lib/bundler/man/bundle-show.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-SHOW" "1" "December 2023" ""
+.TH "BUNDLE\-SHOW" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-show\fR \- Shows all the gems in your bundle, or the path to a gem
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-update.1 b/bundler/lib/bundler/man/bundle-update.1
index 838261df0d92..811b647f7a2e 100644
--- a/bundler/lib/bundler/man/bundle-update.1
+++ b/bundler/lib/bundler/man/bundle-update.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-UPDATE" "1" "December 2023" ""
+.TH "BUNDLE\-UPDATE" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-update\fR \- Update your gems to the latest available versions
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-version.1 b/bundler/lib/bundler/man/bundle-version.1
index d9b0e7c3b183..7236e55cc78d 100644
--- a/bundler/lib/bundler/man/bundle-version.1
+++ b/bundler/lib/bundler/man/bundle-version.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-VERSION" "1" "December 2023" ""
+.TH "BUNDLE\-VERSION" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-version\fR \- Prints Bundler version information
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-viz.1 b/bundler/lib/bundler/man/bundle-viz.1
index 0e7981ac9ad9..95092050167e 100644
--- a/bundler/lib/bundler/man/bundle-viz.1
+++ b/bundler/lib/bundler/man/bundle-viz.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE\-VIZ" "1" "December 2023" ""
+.TH "BUNDLE\-VIZ" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\-viz\fR \- Generates a visual dependency graph for your Gemfile
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle.1 b/bundler/lib/bundler/man/bundle.1
index 2417348be453..7dfeb2b5ee90 100644
--- a/bundler/lib/bundler/man/bundle.1
+++ b/bundler/lib/bundler/man/bundle.1
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "BUNDLE" "1" "December 2023" ""
+.TH "BUNDLE" "1" "January 2024" ""
 .SH "NAME"
 \fBbundle\fR \- Ruby Dependency Management
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/gemfile.5 b/bundler/lib/bundler/man/gemfile.5
index 9f73687c8cca..aeb6f3ab2a79 100644
--- a/bundler/lib/bundler/man/gemfile.5
+++ b/bundler/lib/bundler/man/gemfile.5
@@ -1,6 +1,6 @@
 .\" generated with nRonn/v0.11.1
 .\" https://github.com/n-ronn/nronn/tree/0.11.1
-.TH "GEMFILE" "5" "December 2023" ""
+.TH "GEMFILE" "5" "January 2024" ""
 .SH "NAME"
 \fBGemfile\fR \- A format for describing gem dependencies for Ruby programs
 .SH "SYNOPSIS"
diff --git a/bundler/spec/commands/pristine_spec.rb b/bundler/spec/commands/pristine_spec.rb
index 1aec37f8501b..8ff3141232a3 100644
--- a/bundler/spec/commands/pristine_spec.rb
+++ b/bundler/spec/commands/pristine_spec.rb
@@ -203,13 +203,37 @@
     end
   end
 
-  context "when BUNDLE_GEMFILE doesn't exist" do
-    before do
+  context "when referencing a different gemfile" do
+    it "shows a meaningful error when BUNDLE_GEMFILE doesn't exist" do
       bundle "pristine", env: { "BUNDLE_GEMFILE" => "does/not/exist" }, raise_on_error: false
+      expect(err).to eq("#{bundled_app("does/not/exist")} not found")
     end
 
-    it "shows a meaningful error" do
-      expect(err).to eq("#{bundled_app("does/not/exist")} not found")
+    it "works with --gemfile flag" do
+      create_file "CustomGemfile", <<-G
+        source "#{file_uri_for(gem_repo2)}"
+        gem "foo", :git => "#{lib_path("foo")}", :branch => "main"
+      G
+
+      bundle "install --gemfile CustomGemfile"
+
+      # change weakling so we can confirm it used the right gemfile.
+      weakling_spec = find_spec("weakling")
+      weakling_changes_txt = Pathname.new(weakling_spec.full_gem_path).join("lib/changes.txt")
+      FileUtils.touch(weakling_changes_txt)
+      expect(weakling_changes_txt).to be_file
+
+      # only foo will be fixed as long as --gemfile is respected.
+      foo_spec = find_spec("foo")
+      foo_changed_file = Pathname.new(foo_spec.full_gem_path).join("lib/foo.rb")
+      diff = "#Pristine spec changes"
+      File.open(foo_changed_file, "a") {|f| f.puts diff }
+      expect(File.read(foo_changed_file)).to include(diff)
+
+      bundle "pristine --gemfile CustomGemfile"
+
+      expect(weakling_changes_txt).to be_file # didn't fix weakling
+      expect(File.read(foo_changed_file)).to_not include(diff) # did fix foo
     end
   end