diff --git a/tests/functional/datatypes/test_int128_binary_operations.py b/tests/functional/datatypes/test_int128_binary_operations.py
index 376cabcc..3d781d63 100644
--- a/tests/functional/datatypes/test_int128_binary_operations.py
+++ b/tests/functional/datatypes/test_int128_binary_operations.py
@@ -9,6 +9,11 @@ DESCRIPTION:
   Test verifies https://github.com/FirebirdSQL/firebird/commit/137c3a96e51b8bc34cb74732687067e96c971226
   (Postfix for #6583: enable support of int128 in bin_* family of functions).
 FBTEST:      functional.datatypes.int128_binary_operations
+NOTES:
+    [20.06.2023] pzotov
+    Evaluation of bin_shr(-2^127, 127) should give result of -1. Before 5.0.0.1082 it was wrong: +1.
+    Checked on 5.0.0.1082.
+    Fix for FB 4.x will be soon (message from Alex, 20.06.2023 08:42).
 """
 
 import pytest
@@ -33,7 +38,9 @@ test_script = """
     select bin_not(bi_least) from test_i128; -- expected: 170141183460469231731687303715884105727
     select bin_not(bi_great) from test_i128; -- expected: -170141183460469231731687303715884105728
     select bin_or(bi_least, bi_great) from test_i128; -- expected: -1
-    select bin_shr(bi_least,127) from test_i128;  -- expected: 1
+    
+    select bin_shr(bi_least,127) from test_i128;  -- proper result: -1; before 5.0.0.1082 was wrong: +1
+
     select bin_shr(bi_great,127) from test_i128;  -- expected: 0
     select bin_shl(bi_least,127) from test_i128; -- expected: 0
     select bin_and( bin_shl(bi_great,127), bi_least) from test_i128; -- expected: -170141183460469231731687303715884105728
@@ -49,7 +56,7 @@ expected_stdout = """
     170141183460469231731687303715884105727
     -170141183460469231731687303715884105728
     -1
-    1
+    -1
     0
     0
     -170141183460469231731687303715884105728