Fix import in pytest

Author: Nithurshen

pandas/tests/indexes/interval/test_interval_range.py

@@ -383,10 +383,9 @@ def test_float_freq(self):
 
     def test_interval_range_float32_start_int_freq(self):
         # GH 58964
-        from pandas.testing import assert_index_equal
 
         result = interval_range(start=np.float32(0), end=2, freq=1)
         expected = IntervalIndex.from_tuples(
             [(0.0, 1.0), (1.0, 2.0)], dtype="interval[float64, right]"
         )
-        assert_index_equal(result, expected)
+        tm.assert_index_equal(result, expected)