diff --git a/backend/src/tests/core/domain/value_objects/test_text.py b/backend/src/tests/core/domain/value_objects/test_text.py
index 185b21b16..43a79ef08 100644
--- a/backend/src/tests/core/domain/value_objects/test_text.py
+++ b/backend/src/tests/core/domain/value_objects/test_text.py
@@ -6,16 +6,16 @@
 from kwai.core.domain.value_objects.identifier import IntIdentifier
 from kwai.core.domain.value_objects.name import Name
 from kwai.core.domain.value_objects.owner import Owner
-from kwai.core.domain.value_objects.text import LocaleText, Text
+from kwai.core.domain.value_objects.text import DocumentFormat, Locale, LocaleText, Text
 from kwai.core.domain.value_objects.unique_id import UniqueId
 
 
 @pytest.fixture()
-def content(locale: str):
+def content(locale: Locale):
     """Create a fixture for Content."""
     return LocaleText(
         locale=locale,
-        format="MD",
+        format=DocumentFormat.MARKDOWN,
         title="Test",
         content="Test",
         summary="Test",
@@ -27,7 +27,7 @@ def content(locale: str):
     )
 
 
-@pytest.mark.parametrize("locale", ["nl"])
+@pytest.mark.parametrize("locale", [Locale.NL])
 def test_add_translation(locale, request):
     """Test the add_translation method."""
     content = request.getfixturevalue("content")
@@ -37,7 +37,7 @@ def test_add_translation(locale, request):
     ), f"There should be a translation available for {locale}"
 
 
-@pytest.mark.parametrize("locale", ["nl"])
+@pytest.mark.parametrize("locale", [Locale.NL])
 def test_remove_translation(locale, request):
     """Test the remove_translation method."""
     content = request.getfixturevalue("content")
@@ -47,7 +47,7 @@ def test_remove_translation(locale, request):
     ), f"There should be no translation available for {locale}"
 
 
-@pytest.mark.parametrize("locale", ["nl"])
+@pytest.mark.parametrize("locale", [Locale.NL])
 def test_replace_translation(locale, request):
     """Test the replace_translation method."""
     content = request.getfixturevalue("content")