diff --git a/holidays/countries/isle_of_man.py b/holidays/countries/isle_of_man.py
index 2215d0b13..8ba4d62a8 100644
--- a/holidays/countries/isle_of_man.py
+++ b/holidays/countries/isle_of_man.py
@@ -10,7 +10,6 @@
 #  License: MIT (see LICENSE file)
 
 from datetime import date
-from datetime import timedelta as td
 
 from holidays.calendars.gregorian import JUL
 from holidays.countries.united_kingdom import UnitedKingdom, UnitedKingdomStaticHolidays
@@ -28,7 +27,8 @@ def __init__(self, *args, **kwargs):  # Override UnitedKingdom __init__().
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
         StaticHolidays.__init__(self, UnitedKingdomStaticHolidays)
-        ObservedHolidayBase.__init__(self, observed_rule=SAT_SUN_TO_NEXT_MON, *args, **kwargs)
+        kwargs.setdefault("observed_rule", SAT_SUN_TO_NEXT_MON)
+        ObservedHolidayBase.__init__(self, *args, **kwargs)
 
     def _populate(self, year: int) -> None:
         super()._populate(year)
@@ -47,9 +47,9 @@ def _populate(self, year: int) -> None:
         # Tynwald Day
         # Move to the next Monday if falls on a weekend.
         dt = date(year, JUL, 5)
-        if self._is_weekend(dt) and year >= 1992:
-            dt += td(days=+2 if self._is_saturday(dt) else +1)
-        self._add_holiday("Tynwald Day", dt)
+        self._add_holiday(
+            "Tynwald Day", self._get_observed_date(dt, SAT_SUN_TO_NEXT_MON) if year >= 1992 else dt
+        )
 
 
 class IM(IsleOfMan):
diff --git a/tests/countries/test_isle_of_man.py b/tests/countries/test_isle_of_man.py
index 929037301..d2dcb1bc2 100644
--- a/tests/countries/test_isle_of_man.py
+++ b/tests/countries/test_isle_of_man.py
@@ -42,10 +42,7 @@ def test_2022(self):
             ("2022-04-18", "Easter Monday"),
             ("2022-05-02", "May Day"),
             ("2022-06-02", "Spring Bank Holiday"),
-            (
-                "2022-06-03",
-                "Platinum Jubilee of Elizabeth II; TT Bank Holiday",
-            ),
+            ("2022-06-03", "Platinum Jubilee of Elizabeth II; TT Bank Holiday"),
             ("2022-07-05", "Tynwald Day"),
             ("2022-08-29", "Late Summer Bank Holiday"),
             ("2022-09-19", "State Funeral of Queen Elizabeth II"),