diff --git a/test/rubygems/test_gem_installer.rb b/test/rubygems/test_gem_installer.rb
index 4d59446f..e04594f0 100644
--- a/test/rubygems/test_gem_installer.rb
+++ b/test/rubygems/test_gem_installer.rb
@@ -181,7 +181,7 @@ def test_generate_bin_bindir
     assert_equal true, File.directory?(util_inst_bindir)
     installed_exec = File.join(util_inst_bindir, 'executable')
     assert_equal true, File.exist?(installed_exec)
-    assert_equal(( 0100755 & (~ File.umask)), File.stat(installed_exec).mode) unless win_platform?
+    assert_equal mask, File.stat(installed_exec).mode unless win_platform?
 
     wrapper = File.read installed_exec
     assert_match %r|generated by RubyGems|, wrapper
@@ -196,7 +196,7 @@ def test_generate_bin_script
     assert_equal true, File.directory?(util_inst_bindir)
     installed_exec = File.join(util_inst_bindir, 'executable')
     assert_equal true, File.exist?(installed_exec)
-    assert_equal(( 0100755 & (~ File.umask)), File.stat(installed_exec).mode) unless win_platform?
+    assert_equal mask, File.stat(installed_exec).mode unless win_platform?
 
     wrapper = File.read installed_exec
     assert_match %r|generated by RubyGems|, wrapper
@@ -249,7 +249,7 @@ def test_generate_bin_script_install_dir
 
     installed_exec = File.join("#{@gemhome}2", 'bin', 'executable')
     assert_equal true, File.exist?(installed_exec)
-    assert_equal(( 0100755 & (~ File.umask)), File.stat(installed_exec).mode) unless win_platform?
+    assert_equal mask, File.stat(installed_exec).mode unless win_platform?
 
     wrapper = File.read installed_exec
     assert_match %r|generated by RubyGems|, wrapper
@@ -298,7 +298,7 @@ def test_generate_bin_script_no_shebang
 
     installed_exec = File.join @gemhome, 'bin', 'executable'
     assert_equal true, File.exist?(installed_exec)
-    assert_equal ( 0100755 & (~ File.umask)), File.stat(installed_exec).mode unless win_platform?
+    assert_equal mask, File.stat(installed_exec).mode unless win_platform?
 
     wrapper = File.read installed_exec
     assert_match %r|generated by RubyGems|, wrapper
@@ -323,7 +323,7 @@ def test_generate_bin_script_wrappers
     @installer.generate_bin
     assert_equal true, File.directory?(util_inst_bindir)
     assert_equal true, File.exist?(installed_exec)
-    assert_equal(( 0100755 & (~ File.umask)), File.stat(installed_exec).mode) unless win_platform?
+    assert_equal mask, File.stat(installed_exec).mode unless win_platform?
 
     assert_match %r|generated by RubyGems|, File.read(installed_exec)
 
@@ -1014,5 +1014,9 @@ def util_execless
     @installer = util_installer @spec, gem, @gemhome
   end
 
+  def mask
+    0100755 & (~File.umask)
+  end
+
 end