1 files changed, 8 insertions, 10 deletions
diff --git a/pint/testsuite/test_infer_base_unit.py b/pint/testsuite/test_infer_base_unit.py
index dc3bd82..54a4720 100644
--- a/pint/testsuite/test_infer_base_unit.py
+++ b/pint/testsuite/test_infer_base_unit.py
@@ -1,32 +1,30 @@
 from pint import Quantity as Q
-from pint.testsuite import QuantityTestCase
+from pint.testsuite import helpers
 from pint.util import infer_base_unit
 
 
-class TestInferBaseUnit(QuantityTestCase):
+class TestInferBaseUnit:
     def test_infer_base_unit(self):
         from pint.util import infer_base_unit
 
-        self.assertEqual(
-            infer_base_unit(Q(1, "millimeter * nanometer")), Q(1, "meter**2").units
-        )
+        assert infer_base_unit(Q(1, "millimeter * nanometer")) == Q(1, "meter**2").units
 
     def test_units_adding_to_zero(self):
-        self.assertEqual(infer_base_unit(Q(1, "m * mm / m / um * s")), Q(1, "s").units)
+        assert infer_base_unit(Q(1, "m * mm / m / um * s")) == Q(1, "s").units
 
     def test_to_compact(self):
         r = Q(1000000000, "m") * Q(1, "mm") / Q(1, "s") / Q(1, "ms")
         compact_r = r.to_compact()
         expected = Q(1000.0, "kilometer**2 / second**2")
-        self.assertQuantityAlmostEqual(compact_r, expected)
+        helpers.assert_quantity_almost_equal(compact_r, expected)
 
         r = (Q(1, "m") * Q(1, "mm") / Q(1, "m") / Q(2, "um") * Q(2, "s")).to_compact()
-        self.assertQuantityAlmostEqual(r, Q(1000, "s"))
+        helpers.assert_quantity_almost_equal(r, Q(1000, "s"))
 
     def test_volts(self):
         from pint.util import infer_base_unit
 
         r = Q(1, "V") * Q(1, "mV") / Q(1, "kV")
         b = infer_base_unit(r)
-        self.assertEqual(b, Q(1, "V").units)
-        self.assertQuantityAlmostEqual(r, Q(1, "uV"))
+        assert b == Q(1, "V").units
+        helpers.assert_quantity_almost_equal(r, Q(1, "uV"))