diff --git a/.github/workflows/install-rubygems.yml b/.github/workflows/install-rubygems.yml
index dcd3267644de..7c0689f7cf15 100644
--- a/.github/workflows/install-rubygems.yml
+++ b/.github/workflows/install-rubygems.yml
@@ -41,4 +41,13 @@ jobs:
         run: bundle --version
       - name: Check bundler man pages were installed and are properly picked up
         run: bundle install --help | grep -q BUNDLE-INSTALL
+      - name: Build bundler
+        run: gem build bundler.gemspec
+        working-directory: ./bundler
+      - name: Install built bundler
+        run: gem install bundler-*.gem --verbose > output.txt
+        working-directory: ./bundler
+      - name: Check bundler install didn't hit the network
+        run: if grep -q 'GET http' output.txt; then false; else true; fi
+        working-directory: ./bundler
     timeout-minutes: 10
diff --git a/lib/rubygems/dependency_installer.rb b/lib/rubygems/dependency_installer.rb
index a3e1f0941627..34ab10404b8a 100644
--- a/lib/rubygems/dependency_installer.rb
+++ b/lib/rubygems/dependency_installer.rb
@@ -306,6 +306,7 @@ def resolve_dependencies(dep_or_name, version) # :nodoc:
 
     dependency =
       if spec = installer_set.local?(dep_or_name)
+        installer_set.remote = nil if spec.dependencies.none?
         Gem::Dependency.new spec.name, version
       elsif String === dep_or_name
         Gem::Dependency.new dep_or_name, version