diff --git a/test/test_option_validator.py b/test/test_option_validator.py
index df44b9c..0d35f1e 100644
--- a/test/test_option_validator.py
+++ b/test/test_option_validator.py
@@ -81,6 +81,7 @@ def value_values_index2(value, values, index, auto=False):
             value == 'val2' and values == ['val1', 'val2'] and index == 'val'):
         raise ValueError('error')
 
+
 def value_empty(value, empty, values):
     if not value == 'val' or empty is not False and not values == ['val']:
         raise ValueError('error')
diff --git a/test/test_symlink.py b/test/test_symlink.py
index 648d752..765f50a 100644
--- a/test/test_symlink.py
+++ b/test/test_symlink.py
@@ -11,6 +11,10 @@ from tiramisu.setting import groups, owners
 from py.test import raises
 
 
+def return_value():
+    pass
+
+
 #____________________________________________________________
 def test_symlink_option():
     boolopt = BoolOption("b", "", default=False)
@@ -31,6 +35,26 @@ def test_symlink_option():
     assert config.c is False
 
 
+def test_symlink_getproperties():
+    boolopt = BoolOption('b', '', default=True, properties=('test',))
+    linkopt = SymLinkOption("c", boolopt)
+    descr = OptionDescription('opt', '', [boolopt, linkopt])
+    config = Config(descr)
+    config.read_write()
+    assert boolopt.impl_getproperties() == linkopt.impl_getproperties() == ('test',)
+    assert boolopt.impl_has_callback() == linkopt.impl_has_callback() == False
+
+
+def test_symlink_getcallback():
+    boolopt = BoolOption('b', '', callback=return_value)
+    linkopt = SymLinkOption("c", boolopt)
+    descr = OptionDescription('opt', '', [boolopt, linkopt])
+    config = Config(descr)
+    config.read_write()
+    assert boolopt.impl_has_callback() == linkopt.impl_has_callback() == True
+    assert boolopt.impl_get_callback() == linkopt.impl_get_callback() == (return_value, {})
+
+
 def test_symlink_requires():
     boolopt = BoolOption('b', '', default=True)
     stropt = StrOption('s', '', requires=[{'option': boolopt,
diff --git a/tiramisu/option/baseoption.py b/tiramisu/option/baseoption.py
index 0c5ed6a..b4883a2 100644
--- a/tiramisu/option/baseoption.py
+++ b/tiramisu/option/baseoption.py
@@ -397,7 +397,7 @@ class BaseOption(Base):
         return getattr(self, '_subdyn', None) is not None
 
     def _impl_valid_unicode(self, value):
-        if sys.version_info[0] >= 3:
+        if sys.version_info[0] >= 3:  # pragma: no cover
             if not isinstance(value, str):
                 return ValueError(_('invalid string'))
         else:
@@ -480,7 +480,7 @@ class Option(OnlyOption):
                                                 returns_raise=True)
                     if isinstance(opt_value, Exception):
                         if isinstance(opt_value, PropertiesOptionError):
-                            if debug:
+                            if debug:  # pragma: no cover
                                 log.debug('propertyerror in _launch_consistency: {0}'.format(opt_value))
                             if transitive:
                                 return opt_value
@@ -508,11 +508,8 @@ class Option(OnlyOption):
             err = getattr(self, func)(current_opt, all_cons_opts, all_cons_vals, warnings_only)
             if err:
                 if warnings_only:
-                    if isinstance(err, ValueError):
-                        msg = _('attention, "{0}" could be an invalid {1} for "{2}", {3}').format(
-                            value, self._display_name, current_opt.impl_get_display_name(), err)
-                    else:
-                        msg = '{}'.format(err)
+                    msg = _('attention, "{0}" could be an invalid {1} for "{2}", {3}').format(
+                        value, self._display_name, current_opt.impl_get_display_name(), err)
                     warnings.warn_explicit(ValueWarning(msg, self),
                                            ValueWarning,
                                            self.__class__.__name__, 0)
@@ -582,7 +579,7 @@ class Option(OnlyOption):
                     # option validation
                     err = self._validate(_value, context, current_opt)
                     if err:
-                        if debug:
+                        if debug:  # pragma: no cover
                             log.debug('do_validation: value: {0}, index: {1}, '
                                       'submulti_index: {2}'.format(_value, _index,
                                                                    submulti_index),
@@ -604,7 +601,7 @@ class Option(OnlyOption):
                     if not error:
                         error = self._second_level_validation(_value, self._is_warnings_only())
                     if error:
-                        if debug:
+                        if debug:  # pragma: no cover
                             log.debug(_('do_validation for {0}: error in value').format(
                                 self.impl_getname()), exc_info=True)
                         if self._is_warnings_only():
@@ -839,7 +836,7 @@ class Option(OnlyOption):
                         else:
                             equal.add(opt_)
         if equal:
-            if debug:
+            if debug:  # pragma: no cover
                 log.debug(_('_cons_not_equal: {} are not different').format(display_list(list(equal))))
             if is_current:
                 if warnings_only: