diff --git a/src/backend/core/tests/migrations/test_0018_update_blank_title.py b/src/backend/core/tests/migrations/test_0018_update_blank_title.py
deleted file mode 100644
index 1ac36c6e..00000000
--- a/src/backend/core/tests/migrations/test_0018_update_blank_title.py
+++ /dev/null
@@ -1,35 +0,0 @@
-import pytest
-
-from core import factories
-
-
-@pytest.mark.django_db
-def test_update_blank_title_migration(migrator):
-    """
-    Test that the migration fixes the titles of documents that are
-    "Untitled document", "Unbenanntes Dokument" or "Document sans titre"
-    """
-    migrator.apply_initial_migration(("core", "0017_add_fields_for_soft_delete"))
-
-    english_doc = factories.DocumentFactory(title="Untitled document")
-    german_doc = factories.DocumentFactory(title="Unbenanntes Dokument")
-    french_doc = factories.DocumentFactory(title="Document sans titre")
-    other_doc = factories.DocumentFactory(title="My document")
-
-    assert english_doc.title == "Untitled document"
-    assert german_doc.title == "Unbenanntes Dokument"
-    assert french_doc.title == "Document sans titre"
-    assert other_doc.title == "My document"
-
-    # Apply the migration
-    migrator.apply_tested_migration(("core", "0018_update_blank_title"))
-
-    english_doc.refresh_from_db()
-    german_doc.refresh_from_db()
-    french_doc.refresh_from_db()
-    other_doc.refresh_from_db()
-
-    assert english_doc.title == None
-    assert german_doc.title == None
-    assert french_doc.title == None
-    assert other_doc.title == "My document"
diff --git a/src/backend/core/tests/migrations/test_migrations_0018_update_blank_title.py b/src/backend/core/tests/migrations/test_migrations_0018_update_blank_title.py
new file mode 100644
index 00000000..192103f4
--- /dev/null
+++ b/src/backend/core/tests/migrations/test_migrations_0018_update_blank_title.py
@@ -0,0 +1,47 @@
+import pytest
+
+from core import models
+
+
+@pytest.mark.django_db
+def test_update_blank_title_migration(migrator):
+    """
+    Test that the migration fixes the titles of documents that are
+    "Untitled document", "Unbenanntes Dokument" or "Document sans titre"
+    """
+    old_state = migrator.apply_initial_migration(
+        ("core", "0017_add_fields_for_soft_delete")
+    )
+    OldDocument = old_state.apps.get_model("core", "Document")
+
+    old_english_doc = OldDocument.objects.create(
+        title="Untitled document", depth=1, path="0000001"
+    )
+    old_german_doc = OldDocument.objects.create(
+        title="Unbenanntes Dokument", depth=1, path="0000002"
+    )
+    old_french_doc = OldDocument.objects.create(
+        title="Document sans titre", depth=1, path="0000003"
+    )
+    old_other_doc = OldDocument.objects.create(
+        title="My document", depth=1, path="0000004"
+    )
+
+    assert old_english_doc.title == "Untitled document"
+    assert old_german_doc.title == "Unbenanntes Dokument"
+    assert old_french_doc.title == "Document sans titre"
+    assert old_other_doc.title == "My document"
+
+    # Apply the migration
+    new_state = migrator.apply_tested_migration(("core", "0018_update_blank_title"))
+    NewDocument = new_state.apps.get_model("core", "Document")
+
+    new_english_doc = NewDocument.objects.get(pk=old_english_doc.pk)
+    new_german_doc = NewDocument.objects.get(pk=old_german_doc.pk)
+    new_french_doc = NewDocument.objects.get(pk=old_french_doc.pk)
+    new_other_doc = NewDocument.objects.get(pk=old_other_doc.pk)
+
+    assert new_english_doc.title == None
+    assert new_german_doc.title == None
+    assert new_french_doc.title == None
+    assert new_other_doc.title == "My document"