diff --git a/Library/Homebrew/test/test_formula_install.rb b/Library/Homebrew/test/test_formula_install.rb
index ab31005fb6..7a69a50aff 100644
--- a/Library/Homebrew/test/test_formula_install.rb
+++ b/Library/Homebrew/test/test_formula_install.rb
@@ -23,12 +23,22 @@ end
 
 class ConfigureTests < Test::Unit::TestCase
   def test_detect_failed_configure
-    f=ConfigureFails.new
+    tmperr = $stderr
+    tmpout = $stdout
+    require 'stringio'
+    $stderr = StringIO.new
+    $stdout = StringIO.new
+
+    f = ConfigureFails.new
+
     begin
       f.brew { f.install }
     rescue BuildError => e
       assert e.was_running_configure?
     end
+
+    $stderr = tmperr
+    $stdout = tmpout
   end
 end