diff --git a/test/new_api/test_cache.py b/test/new_api/test_cache.py
index 0ff7683..8a9a58a 100644
--- a/test/new_api/test_cache.py
+++ b/test/new_api/test_cache.py
@@ -245,6 +245,7 @@ def test_reset_cache_only_expired():
     od1 = make_description()
     c = Config(od1)
     api = getapi(c)
+    api.property.add('expire')
     values = c.cfgimpl_get_values()
     settings = c.cfgimpl_get_settings()
     api.option('u1').value.get()
@@ -274,7 +275,7 @@ def test_cache_not_expire():
     api = getapi(c)
     values = c.cfgimpl_get_values()
     settings = c.cfgimpl_get_settings()
-    api.property.pop('expire')
+    #api.property.pop('expire')
     api.option('u1').value.get()
     assert 'u1' in values._p_.get_cached()
     assert 'u1' in settings._p_.get_cached()
@@ -438,7 +439,7 @@ def test_cache_callback():
     cfg = Config(maconfig)
     api = getapi(cfg)
     api.property.read_write()
-    api.property.pop('expire')
+    #api.property.pop('expire')
     api.option.make_dict()
     #assert cfg.cfgimpl_get_settings()._p_.get_cached() == {None: {None: (set(['cache', 'disabled', 'frozen', 'hidden', 'validator', 'warnings']), None)},
     #                                                       'val1': {None: (set([]), None)}}
@@ -528,7 +529,7 @@ def test_cache_master_and_slaves_master():
     cfg = Config(maconfig)
     api = getapi(cfg)
     api.property.read_write()
-    api.property.pop('expire')
+    #api.property.pop('expire')
     api.option.make_dict()
     global_props = ['cache', 'disabled', 'frozen', 'hidden', 'validator', 'warnings']
     val1_props = []
@@ -606,7 +607,7 @@ def test_cache_master_callback():
     cfg = Config(maconfig)
     api = getapi(cfg)
     api.property.read_write()
-    api.property.pop('expire')
+    #api.property.pop('expire')
     api.option.make_dict()
     global_props = ['cache', 'disabled', 'frozen', 'hidden', 'validator', 'warnings']
     val1_props = []
@@ -705,7 +706,7 @@ def test_cache_requires():
     c = Config(od)
     api = getapi(c)
     api.property.read_write()
-    api.property.pop('expire')
+    #api.property.pop('expire')
     #assert c.cfgimpl_get_settings()._p_.get_cached() == {}
     assert c.cfgimpl_get_values()._p_.get_cached() == {}
     assert api.option('ip_address_service').value.get() == None
@@ -754,7 +755,7 @@ def test_cache_global_properties():
     c = Config(od)
     api = getapi(c)
     api.property.read_write()
-    api.property.pop('expire')
+    #api.property.pop('expire')
     #assert c.cfgimpl_get_settings()._p_.get_cached() == {}
     assert c.cfgimpl_get_values()._p_.get_cached() == {}
     assert api.option('ip_address_service').value.get() == None
@@ -783,6 +784,7 @@ def test_callback_value_incr():
     cfg = Config(maconfig)
     api = getapi(cfg)
     api.property.read_write()
+    api.property.add('expire')
     assert api.option('val1').value.get() == 1
     sleep(1)
     assert api.option('val2').value.get() == 1
diff --git a/test/new_api/test_option_setting.py b/test/new_api/test_option_setting.py
index 07be0be..5290dbf 100644
--- a/test/new_api/test_option_setting.py
+++ b/test/new_api/test_option_setting.py
@@ -446,7 +446,7 @@ def test_reset_properties_force_store_value():
     assert api.property.get_modified() == {}
     api.property.add('frozen')
     assert api.property.get_modified() == \
-            {None: set(('frozen', 'expire', 'cache', 'validator', 'warnings'))}
+            {None: set(('frozen', 'cache', 'validator', 'warnings'))}
     api.property.reset()
     assert api.property.get_modified() == {}
     api.option('gc.dummy').property.add('test')
@@ -455,15 +455,15 @@ def test_reset_properties_force_store_value():
     assert api.property.get_modified() == {'gc.dummy': set(('test', 'force_store_value'))}
     api.property.add('frozen')
     assert api.property.get_modified() == \
-            {None: set(('frozen', 'expire', 'validator', 'cache', 'warnings')),
+            {None: set(('frozen', 'validator', 'cache', 'warnings')),
              'gc.dummy': set(('test', 'force_store_value'))}
     api.property.add('frozen')
     assert api.property.get_modified() == \
-            {None: set(('frozen', 'expire', 'validator', 'cache', 'warnings')),
+            {None: set(('frozen', 'validator', 'cache', 'warnings')),
              'gc.dummy': set(('test', 'force_store_value'))}
     api.option('gc.dummy').property.add('test')
     assert api.property.get_modified() == \
-            {None: set(('frozen', 'expire', 'validator', 'cache', 'warnings')),
+            {None: set(('frozen', 'validator', 'cache', 'warnings')),
              'gc.dummy': set(('test', 'force_store_value'))}
 
 
@@ -473,9 +473,9 @@ def test_set_modified_value():
     descr = OptionDescription('tiramisu', '', [gcgroup])
     api = getapi(Config(descr))
     assert api.property.get_modified() == {}
-    api.property.set_modified({None: set(('frozen', 'expire', 'cache', 'validator', 'warnings'))})
+    api.property.set_modified({None: set(('frozen', 'cache', 'validator', 'warnings'))})
     assert api.property.get_modified() == \
-            {None: set(('frozen', 'expire', 'cache', 'validator', 'warnings'))}
+            {None: set(('frozen', 'cache', 'validator', 'warnings'))}
 
 
 def test_pprint():
diff --git a/tiramisu/setting.py b/tiramisu/setting.py
index 4795fe9..bd180db 100644
--- a/tiramisu/setting.py
+++ b/tiramisu/setting.py
@@ -85,7 +85,7 @@ validator
 warnings
     display warnings during validation
 """
-default_properties = ('cache', 'expire', 'validator', 'warnings')
+default_properties = ('cache', 'validator', 'warnings')
 
 """Config can be in two defaut mode:
 
diff --git a/tiramisu/value.py b/tiramisu/value.py
index 5f3cb5b..628610b 100644
--- a/tiramisu/value.py
+++ b/tiramisu/value.py
@@ -118,9 +118,7 @@ class Values(object):
                                   config_bag=config_bag)
         # store value in cache
         if not is_cached and \
-            setting_properties and 'cache' in setting_properties and \
-                    config_bag.validate and config_bag.force_permissive is False and \
-                    config_bag.trusted_cached_properties is True:
+                setting_properties and 'cache' in setting_properties:
             if 'expire' in setting_properties:
                 if ntime is None:
                     ntime = int(time())