diff --git a/tests/functional/arno/optimizer/test_opt_inner_join_05.py b/tests/functional/arno/optimizer/test_opt_inner_join_05.py
index 35cbbba6..b6e2fc91 100644
--- a/tests/functional/arno/optimizer/test_opt_inner_join_05.py
+++ b/tests/functional/arno/optimizer/test_opt_inner_join_05.py
@@ -23,7 +23,10 @@ NOTES:
     Checked on 6.0.0.467-cc183f5, 5.0.2.1513
 
     [31.10.2024] pzotov
-    Adjusted expected_out discuss with dimitr. Explained plans for 5.x and 6.x are now identical.
+    Adjusted expected_out discuss with dimitr: explained plan for FB 6.x became identical to FB 5.x and earlier after
+    https://github.com/FirebirdSQL/firebird/commit/e7e9e01fa9d7c13d8513fcadca102d23ad7c5e2a
+    ("Rework fix for #8290: Unique scan is incorrectly reported in the explained plan for unique index and IS NULL predicate")
+
     Checked on 3.0.13.33794, 4.0.6.3165, 5.0.2.1551, 6.0.0.515
 """