diff --git a/ruff-strict-pep8.toml b/ruff-strict-pep8.toml
index a456ad204b..a1bca3d6ed 100644
--- a/ruff-strict-pep8.toml
+++ b/ruff-strict-pep8.toml
@@ -13,19 +13,25 @@ exclude = [
     "src/tinycss/*",
 ]
 
+preview = true
+
 [format]
 quote-style = 'single'
 
 [lint]
+explicit-preview-rules = true
 ignore = [
     'E402', 'E722', 'E741',
     'UP012', 'UP030', 'UP032', 'UP038', 'C413', 'C420',
     'RUF001', 'RUF002', 'RUF003', 'RUF005', 'RUF012', 'RUF013', 'RUF015', 'RUF031', 'RUF100',
+    'F841',  # because in preview, unused tuple unpacking variable that not use dummy syntax (prefix '_' underscore)
+             # raise error 'unused-variable', sigh (https://github.com/astral-sh/ruff/issues/8884)
 ]
 select = [
     'E', 'F', 'I', 'W', 'INT',
     'Q', 'UP', 'YTT', 'TID', 'C4', 'COM818',
     'RUF',  # nota: RUF can flag many unsolicited errors
+    # preview rules
 ]
 
 [lint.per-file-ignores]