diff --git a/pint/testsuite/test_issues.py b/pint/testsuite/test_issues.py
index 3b06fd6..4728f47 100644
--- a/pint/testsuite/test_issues.py
+++ b/pint/testsuite/test_issues.py
@@ -561,4 +561,14 @@ class TestIssuesNP(QuantityTestCase):
         a = np.asarray([1, 2, 3])
         q = [1, 2, 3] * ureg.dimensionless
         p = (q ** q).m
-        np.testing.assert_array_equal(p, a ** a)
\ No newline at end of file
+        np.testing.assert_array_equal(p, a ** a)
+
+    def test_issue532(self):
+        ureg = self.ureg
+
+        @ureg.check(ureg(''))
+        def f(x):
+            return 2 * x
+
+        self.assertEqual(f(ureg.Quantity(1, '')), 2)
+        self.assertRaises(DimensionalityError, f, ureg.Quantity(1, 'm'))