diff --git a/Library/Homebrew/test/test_utils.rb b/Library/Homebrew/test/test_utils.rb
index 98f31ca41a..ca8016c27d 100644
--- a/Library/Homebrew/test/test_utils.rb
+++ b/Library/Homebrew/test/test_utils.rb
@@ -17,14 +17,18 @@ class UtilTests < Test::Unit::TestCase
 
   def test_arch_for_command
     arches=archs_for_command '/usr/bin/svn'
-    if `sw_vers -productVersion` =~ /10\.(\d+)/ and $1.to_i >= 6
+    if `sw_vers -productVersion` =~ /10\.(\d+)/ and $1.to_i >= 7
+      assert_equal 2, arches.length
+      assert arches.include?(:x86_64)
+    elsif `sw_vers -productVersion` =~ /10\.(\d+)/ and $1.to_i = 6
       assert_equal 3, arches.length
       assert arches.include?(:x86_64)
+      assert arches.include?(:ppc7400)
     else
       assert_equal 2, arches.length
+      assert arches.include?(:ppc7400)
     end
     assert arches.include?(:i386)
-    assert arches.include?(:ppc7400)
   end
 
 end