diff --git a/test/test_results.py b/test/test_results.py
index d74c6543..4f375ab3 100644
--- a/test/test_results.py
+++ b/test/test_results.py
@@ -15,6 +15,7 @@ def test_dft_engine() -> None:
 
 
 def test_LOT() -> None:
+    # LOT = level of theory
     res = results.read(j('test', 'fixtures', 'DFT_EDA'))
     assert res.level.summary == 'OLYP/TZ2P'