diff --git a/test/test_option_validator.py b/test/test_option_validator.py
index 9a39816..dc08c82 100644
--- a/test/test_option_validator.py
+++ b/test/test_option_validator.py
@@ -6,6 +6,7 @@ from tiramisu.config import Config
 from tiramisu.option import StrOption, OptionDescription
 from tiramisu.setting import groups
 from tiramisu.error import ValueWarning
+from tiramisu.i18n import _
 
 
 def return_true(value, param=None):
@@ -87,7 +88,7 @@ def test_validator_warning():
         cfg.opt2 = 'val'
     assert len(w) == 1
     assert w[0].message.opt == opt2
-    assert str(w[0].message) == 'invalid value for option opt2: error'
+    assert str(w[0].message) == _('invalid value for option {0}: {1}').format('opt2', 'error')
     #
     with warnings.catch_warnings(record=True) as w:
         cfg.opt3.append('val')
@@ -97,7 +98,7 @@ def test_validator_warning():
         cfg.opt3.append('val1')
     assert len(w) == 1
     assert w[0].message.opt == opt3
-    assert str(w[0].message) == 'invalid value for option opt3: error'
+    assert str(w[0].message) == _('invalid value for option {0}: {1}').format('opt3', 'error')
     raises(ValueError, "cfg.opt2 = 1")
     #
     with warnings.catch_warnings(record=True) as w:
@@ -105,9 +106,9 @@ def test_validator_warning():
         cfg.opt3.append('val')
     assert len(w) == 2
     assert w[0].message.opt == opt2
-    assert str(w[0].message) == 'invalid value for option opt2: error'
+    assert str(w[0].message) == _('invalid value for option {0}: {1}').format('opt2', 'error')
     assert w[1].message.opt == opt3
-    assert str(w[1].message) == 'invalid value for option opt3: error'
+    assert str(w[1].message) == _('invalid value for option {0}: {1}').format('opt3', 'error')
 
 
 def test_validator_warning_master_slave():
@@ -127,29 +128,29 @@ def test_validator_warning_master_slave():
         cfg.ip_admin_eth0.netmask_admin_eth0 = ['val1']
     assert len(w) == 1
     assert w[0].message.opt == netmask_admin_eth0
-    assert str(w[0].message) == 'invalid value for option netmask_admin_eth0: error'
+    assert str(w[0].message) == _('invalid value for option {0}: {1}').format('netmask_admin_eth0', 'error')
     #
     with warnings.catch_warnings(record=True) as w:
         cfg.ip_admin_eth0.ip_admin_eth0 = ['val']
     assert len(w) == 1
     assert w[0].message.opt == ip_admin_eth0
-    assert str(w[0].message) == 'invalid value for option ip_admin_eth0: error'
+    assert str(w[0].message) == _('invalid value for option {0}: {1}').format('ip_admin_eth0', 'error')
     #
     with warnings.catch_warnings(record=True) as w:
         cfg.ip_admin_eth0.ip_admin_eth0 = ['val', 'val1', 'val1']
     assert len(w) == 1
     assert w[0].message.opt == ip_admin_eth0
-    assert str(w[0].message) == 'invalid value for option ip_admin_eth0: error'
+    assert str(w[0].message) == _('invalid value for option {0}: {1}').format('ip_admin_eth0', 'error')
     #
     with warnings.catch_warnings(record=True) as w:
         cfg.ip_admin_eth0.ip_admin_eth0 = ['val1', 'val', 'val1']
     assert len(w) == 1
     assert w[0].message.opt == ip_admin_eth0
-    assert str(w[0].message) == 'invalid value for option ip_admin_eth0: error'
+    assert str(w[0].message) == _('invalid value for option {0}: {1}').format('ip_admin_eth0', 'error')
     #
     warnings.resetwarnings()
     with warnings.catch_warnings(record=True) as w:
         cfg.ip_admin_eth0.ip_admin_eth0 = ['val1', 'val1', 'val']
     assert len(w) == 1
     assert w[0].message.opt == ip_admin_eth0
-    assert str(w[0].message) == 'invalid value for option ip_admin_eth0: error'
+    assert str(w[0].message) == _('invalid value for option {0}: {1}').format('ip_admin_eth0', 'error')