2 files changed, 10 insertions, 0 deletions
diff --git a/test/rubygems/test_gem.rb b/test/rubygems/test_gem.rb
index ac40d97c15..a320d54884 100644
--- a/test/rubygems/test_gem.rb
+++ b/test/rubygems/test_gem.rb
@@ -1,6 +1,7 @@
 # coding: US-ASCII
 require 'rubygems/test_case'
 require 'rubygems'
+require 'rubygems/command'
 require 'rubygems/installer'
 require 'pathname'
 require 'tmpdir'
diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index 9f7c354334..8efae025e7 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -1210,6 +1210,15 @@ dependencies: []
     FileUtils.chmod 0755, @gemhome
   end
 
+  def test_build_extensions_none
+    refute_path_exists @a1.extension_install_dir, 'sanity check'
+    assert_empty @a1.extensions, 'sanity check'
+
+    @a1.build_extensions
+
+    refute_path_exists @a1.extension_install_dir
+  end
+
   def test_contains_requirable_file_eh
     code_rb = File.join @a1.gem_dir, 'lib', 'code.rb'
     FileUtils.mkdir_p File.dirname code_rb