diff --git a/src/rougail/xmlreflector.py b/src/rougail/xmlreflector.py
index 19e7831d1..6021f1aa9 100644
--- a/src/rougail/xmlreflector.py
+++ b/src/rougail/xmlreflector.py
@@ -61,19 +61,26 @@ class XMLReflector:
 
         :param xmlfolders: list of full folder's name
         """
+        filenames = {}
         for xmlfolder in xmlfolders:
-            filenames = [join(xmlfolder, filename) for filename in listdir(xmlfolder) if \
-                         filename.endswith('.xml')]
-            filenames.sort()
-            if not filenames:
-                raise DictConsistencyError(_('there is no XML file'), 77, [xmlfolder])
-            for xmlfile in filenames:
-                try:
-                    document = parse(xmlfile)
-                except XMLSyntaxError as err:
-                    raise DictConsistencyError(_(f'not a XML file: {err}'), 52, [xmlfile]) from err
-                if not self.dtd.validate(document):
-                    dtd_error = self.dtd.error_log.filter_from_errors()[0]
-                    msg = _(f'not a valid XML file: {dtd_error}')
-                    raise DictConsistencyError(msg, 43, [xmlfile])
-                yield xmlfile, document.getroot()
+            for filename in listdir(xmlfolder):
+                if not filename.endswith('.xml'):
+                    continue
+                if filename in filenames:
+                    raise DictConsistencyError(_(f'duplicate xml file name {filename}'), 78, [xmlfolder])
+                filenames[filename] = join(xmlfolder, filename)
+        if not filenames:
+            raise DictConsistencyError(_('there is no XML file'), 77, [xmlfolder])
+        file_names = list(filenames.keys())
+        file_names.sort()
+        for filename in file_names:
+            xmlfile = filenames[filename]
+            try:
+                document = parse(xmlfile)
+            except XMLSyntaxError as err:
+                raise DictConsistencyError(_(f'not a XML file: {err}'), 52, [xmlfile]) from err
+            if not self.dtd.validate(document):
+                dtd_error = self.dtd.error_log.filter_from_errors()[0]
+                msg = _(f'not a valid XML file: {dtd_error}')
+                raise DictConsistencyError(msg, 43, [xmlfile])
+            yield xmlfile, document.getroot()
diff --git a/tests/dictionaries/00load_subfolder/tiramisu/base.py b/tests/dictionaries/00load_subfolder/tiramisu/base.py
index 9ffd7df51..f5981b865 100644
--- a/tests/dictionaries/00load_subfolder/tiramisu/base.py
+++ b/tests/dictionaries/00load_subfolder/tiramisu/base.py
@@ -14,8 +14,8 @@ try:
     from tiramisu3 import *
 except:
     from tiramisu import *
-option_3 = StrOption(name="mode_conteneur_actif", doc="No change", default="non", properties=frozenset({"force_default_on_freeze", "frozen", "hidden", "mandatory", "normal"}))
-option_4 = StrOption(name="mode_conteneur_actif1", doc="No change", default="non", properties=frozenset({"force_default_on_freeze", "frozen", "hidden", "mandatory", "normal"}))
+option_3 = StrOption(name="mode_conteneur_actif1", doc="No change", default="non", properties=frozenset({"force_default_on_freeze", "frozen", "hidden", "mandatory", "normal"}))
+option_4 = StrOption(name="mode_conteneur_actif", doc="No change", default="non", properties=frozenset({"force_default_on_freeze", "frozen", "hidden", "mandatory", "normal"}))
 option_2 = OptionDescription(name="general", doc="général", children=[option_3, option_4], properties=frozenset({"normal"}))
 option_1 = OptionDescription(name="rougail", doc="rougail", children=[option_2])
 option_0 = OptionDescription(name="baseoption", doc="baseoption", children=[option_1])