diff --git a/tool/test_for_warn_bundled_gems/test_no_warn_dash_gem.rb b/tool/test_for_warn_bundled_gems/test_no_warn_dash_gem.rb
index 72ae23b040..0c6e1c9354 100644
--- a/tool/test_for_warn_bundled_gems/test_no_warn_dash_gem.rb
+++ b/tool/test_for_warn_bundled_gems/test_no_warn_dash_gem.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_no_warn_dependency.rb b/tool/test_for_warn_bundled_gems/test_no_warn_dependency.rb
index 94a32a9108..11178b5bd1 100644
--- a/tool/test_for_warn_bundled_gems/test_no_warn_dependency.rb
+++ b/tool/test_for_warn_bundled_gems/test_no_warn_dependency.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_no_warn_sub_feature.rb b/tool/test_for_warn_bundled_gems/test_no_warn_sub_feature.rb
index 7d62a2f9d0..d2b96615cf 100644
--- a/tool/test_for_warn_bundled_gems/test_no_warn_sub_feature.rb
+++ b/tool/test_for_warn_bundled_gems/test_no_warn_sub_feature.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_warn_bootsnap.rb b/tool/test_for_warn_bundled_gems/test_warn_bootsnap.rb
index eac58de974..230ed3ece9 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_bootsnap.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_bootsnap.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_warn_bootsnap_and_gem.rb b/tool/test_for_warn_bundled_gems/test_warn_bootsnap_and_gem.rb
index d154b46022..00fd7709e9 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_bootsnap_and_gem.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_bootsnap_and_gem.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_warn_bootsnap_rubyarchdir_gem.rb b/tool/test_for_warn_bundled_gems/test_warn_bootsnap_rubyarchdir_gem.rb
index 477933f6f2..866da9c065 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_bootsnap_rubyarchdir_gem.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_bootsnap_rubyarchdir_gem.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_warn_bundled_gems.rb b/tool/test_for_warn_bundled_gems/test_warn_bundled_gems.rb
index 13168292e3..bd0e184f7f 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_bundled_gems.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_bundled_gems.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_warn_dash_gem.rb b/tool/test_for_warn_bundled_gems/test_warn_dash_gem.rb
index 04ef2a52c0..49c7d9be46 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_dash_gem.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_dash_gem.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_warn_dependency.rb b/tool/test_for_warn_bundled_gems/test_warn_dependency.rb
index 9be3a2f6d9..31e416624c 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_dependency.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_dependency.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_warn_redefined.rb b/tool/test_for_warn_bundled_gems/test_warn_redefined.rb
index a898a8c07c..3aee2b0991 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_redefined.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_redefined.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 module My
   def warn(msg)
   end
diff --git a/tool/test_for_warn_bundled_gems/test_warn_sub_feature.rb b/tool/test_for_warn_bundled_gems/test_warn_sub_feature.rb
index bf7eb3572d..586a8a13be 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_sub_feature.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_sub_feature.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do
diff --git a/tool/test_for_warn_bundled_gems/test_warn_zeitwerk.rb b/tool/test_for_warn_bundled_gems/test_warn_zeitwerk.rb
index d554a0e675..2076af0408 100644
--- a/tool/test_for_warn_bundled_gems/test_warn_zeitwerk.rb
+++ b/tool/test_for_warn_bundled_gems/test_warn_zeitwerk.rb
@@ -1,3 +1,6 @@
+require "bundler"
+Bundler::Definition.no_lock = true
+
 require "bundler/inline"
 
 gemfile do