diff --git a/tests/test_config.py b/tests/test_config.py
index d664af6..a78819a 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -13,10 +13,19 @@ def test_load_default_config(tmp_path):
 
     assert cfg.provider == "ollama"
     assert cfg.hotkey == "ctrl+alt+a"
-    assert cfg.math_text_format == "unicode"
+    assert cfg.math_text_format == "word_equation"
     assert "Réponds directement" in cfg.system_prompt
 
 
+def test_accept_word_equation_format(tmp_path):
+    path = tmp_path / "config.json"
+    path.write_text(json.dumps({"provider": "ollama", "math_text_format": "word_equation"}), encoding="utf-8")
+
+    cfg = load_config(path)
+
+    assert cfg.math_text_format == "word_equation"
+
+
 def test_timeout_zero_disables_timeout(tmp_path):
     path = tmp_path / "config.json"
     path.write_text(json.dumps({"provider": "ollama", "request_timeout_seconds": 0}), encoding="utf-8")