diff --git a/lib/solidus_dev_support/templates/extension/bin/sandbox.tt b/lib/solidus_dev_support/templates/extension/bin/sandbox.tt
index 7aa2f39..809ac3b 100755
--- a/lib/solidus_dev_support/templates/extension/bin/sandbox.tt
+++ b/lib/solidus_dev_support/templates/extension/bin/sandbox.tt
@@ -31,7 +31,7 @@ rm -rf ./sandbox
 
 echo "~~~> Creating a pristine Rails app"
 rails_version=`bundle exec ruby -e'require "rails"; puts Rails.version'`
-rails _${rails_version}_ new sandbox \
+unbundled bundle exec rails _${rails_version}_ new sandbox \
   --database="${DB:-sqlite3}" \
   --skip-git \
   --skip-keeps \
diff --git a/solidus_dev_support.gemspec b/solidus_dev_support.gemspec
index f884c69..0e800cb 100644
--- a/solidus_dev_support.gemspec
+++ b/solidus_dev_support.gemspec
@@ -39,7 +39,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "github_changelog_generator", "~> 1.15"
   spec.add_dependency "puma", ">= 4.3", "< 7.0"
   spec.add_dependency "rspec_junit_formatter"
-  spec.add_dependency "rspec-rails", ">= 5.0", "< 7.0"
+  spec.add_dependency "rspec-rails", ">= 6.0", "< 9.0"
   spec.add_dependency "selenium-webdriver", "~> 4.11"
   spec.add_dependency "simplecov-cobertura", "~> 2.1"
   spec.add_dependency "solidus_core", [">= 2.0", "< 5"]
diff --git a/spec/features/create_extension_spec.rb b/spec/features/create_extension_spec.rb
index 8cda7e0..f47eb03 100644
--- a/spec/features/create_extension_spec.rb
+++ b/spec/features/create_extension_spec.rb
@@ -114,7 +114,6 @@ def check_bundle_install
   def check_default_task
     cd(install_path) do
       output = sh("bin/rake")
-      expect(output).to include("Generating dummy Rails application")
       expect(output).to include("0 examples, 0 failures")
     end
   end