2 files changed, 9 insertions, 2 deletions
diff --git a/activesupport/test/cache/stores/mem_cache_store_test.rb b/activesupport/test/cache/stores/mem_cache_store_test.rb
index becc1f7fbf..1b73fb65eb 100644
--- a/activesupport/test/cache/stores/mem_cache_store_test.rb
+++ b/activesupport/test/cache/stores/mem_cache_store_test.rb
@@ -24,7 +24,7 @@ class MemCacheStoreTest < ActiveSupport::TestCase
     @data = @cache.instance_variable_get(:@data)
     @cache.clear
     @cache.silence!
-    @cache.logger = ActiveSupport::Logger.new("/dev/null")
+    @cache.logger = ActiveSupport::Logger.new(File::NULL)
   end
 
   include CacheStoreBehavior
diff --git a/activesupport/test/current_attributes_test.rb b/activesupport/test/current_attributes_test.rb
index d333ffc8f5..1669f08f68 100644
--- a/activesupport/test/current_attributes_test.rb
+++ b/activesupport/test/current_attributes_test.rb
@@ -30,7 +30,14 @@ class CurrentAttributesTest < ActiveSupport::TestCase
     end
   end
 
-  setup { Current.reset }
+  setup do
+    @original_time_zone = Time.zone
+    Current.reset
+  end
+
+  teardown do
+    Time.zone = @original_time_zone
+  end
 
   test "read and write attribute" do
     Current.world = "world/1"