diff --git a/tests/test_character_identity.py b/tests/test_character_identity.py
index 5fd4f95..50c429c 100644
--- a/tests/test_character_identity.py
+++ b/tests/test_character_identity.py
@@ -214,7 +214,9 @@ class PromptHygieneTests(unittest.TestCase):
         sheet = {"clothing": "Rüstung und Schwert"}
         designs = {_character_design_variation(n, sheet) for n in ("Alrik", "Baron", "Coran", "Darrag", "Elda", "Fenn", "Garbag", "Himgi")}
         self.assertGreaterEqual(len(designs), 5)
-        self.assertEqual(_character_design_variation("Alrik", sheet), _character_design_variation("Alrik", sheet))
+        first = _character_design_variation("Alrik", sheet)
+        second = _character_design_variation("Alrik", sheet)
+        self.assertEqual(first, second)
 
     def test_colours_the_sheet_already_names_are_kept(self):
         from routes.conversation import _character_design_variation
diff --git a/tests/test_conversation.py b/tests/test_conversation.py
index 6e2b539..96d4cff 100644
--- a/tests/test_conversation.py
+++ b/tests/test_conversation.py
@@ -82,8 +82,11 @@ class AttributionParserTests(unittest.TestCase):
             shutil.rmtree(_BACKGROUND_ARTIFACT_DIR / job_id, ignore_errors=True)
 
     def test_generated_image_digest_is_stable_and_rejects_invalid_data_uri(self):
-        self.assertEqual(_data_image_digest("data:image/png;base64,AA=="), _data_image_digest("data:image/png;base64,AA=="))
-        self.assertTrue(_data_image_digest("data:image/png;base64,AA=="))
+        uri = "data:image/png;base64,AA=="
+        first = _data_image_digest(uri)
+        second = _data_image_digest(uri)
+        self.assertEqual(first, second)
+        self.assertTrue(first)
         self.assertEqual(_data_image_digest("not-an-image"), "")
 
     def test_active_character_form_overlays_visual_identity_without_changing_record(self):