diff --git a/pandas/tests/arithmetic/test_datetime64.py b/pandas/tests/arithmetic/test_datetime64.py
index 6f7222f523579..d239687a37757 100644
--- a/pandas/tests/arithmetic/test_datetime64.py
+++ b/pandas/tests/arithmetic/test_datetime64.py
@@ -887,7 +887,7 @@ def test_dt64arr_add_sub_td64ndarray(self, tz_naive_fixture, box_with_array):
 
         result = dtarr - tdarr
         tm.assert_equal(result, expected)
-        msg = "cannot subtract|bad operand type for unary -"
+        msg = "cannot subtract|(bad|unsupported) operand type for unary"
         with pytest.raises(TypeError, match=msg):
             tdarr - dtarr
 
@@ -1126,7 +1126,7 @@ def test_dt64arr_series_sub_tick_DateOffset(self, box_with_array):
 
         result2 = -pd.offsets.Second(5) + ser
         tm.assert_equal(result2, expected)
-        msg = "bad operand type for unary"
+        msg = "(bad|unsupported) operand type for unary"
         with pytest.raises(TypeError, match=msg):
             pd.offsets.Second(5) - ser
 
@@ -1220,7 +1220,7 @@ def test_dt64arr_add_sub_relativedelta_offsets(self, box_with_array):
             expected = DatetimeIndex([x - off for x in vec_items])
             expected = tm.box_expected(expected, box_with_array)
             tm.assert_equal(expected, vec - off)
-            msg = "bad operand type for unary"
+            msg = "(bad|unsupported) operand type for unary"
             with pytest.raises(TypeError, match=msg):
                 off - vec
 
@@ -1336,7 +1336,7 @@ def test_dt64arr_add_sub_DateOffsets(
             expected = DatetimeIndex([offset + x for x in vec_items])
             expected = tm.box_expected(expected, box_with_array)
             tm.assert_equal(expected, offset + vec)
-            msg = "bad operand type for unary"
+            msg = "(bad|unsupported) operand type for unary"
             with pytest.raises(TypeError, match=msg):
                 offset - vec
 
@@ -1920,7 +1920,7 @@ def test_operators_datetimelike_with_timezones(self):
         result = dt1 - td1[0]
         exp = (dt1.dt.tz_localize(None) - td1[0]).dt.tz_localize(tz)
         tm.assert_series_equal(result, exp)
-        msg = "bad operand type for unary"
+        msg = "(bad|unsupported) operand type for unary"
         with pytest.raises(TypeError, match=msg):
             td1[0] - dt1
 
diff --git a/pandas/tests/arithmetic/test_timedelta64.py b/pandas/tests/arithmetic/test_timedelta64.py
index d480b26e30fff..ecb07fa49036a 100644
--- a/pandas/tests/arithmetic/test_timedelta64.py
+++ b/pandas/tests/arithmetic/test_timedelta64.py
@@ -245,7 +245,7 @@ def test_subtraction_ops(self):
         with pytest.raises(TypeError, match=msg):
             td - dt
 
-        msg = "bad operand type for unary -: 'DatetimeArray'"
+        msg = "(bad|unsupported) operand type for unary"
         with pytest.raises(TypeError, match=msg):
             td - dti