diff --git a/test/unit/test_transcendental_helpers.py b/test/unit/test_transcendental_helpers.py
index f51ad1c973..126d6bbabf 100644
--- a/test/unit/test_transcendental_helpers.py
+++ b/test/unit/test_transcendental_helpers.py
@@ -1,8 +1,9 @@
 import unittest, math
 import numpy as np
 from tinygrad import dtypes
+from tinygrad.dtype import DType
 from tinygrad.ops import UOp, Ops
-from tinygrad.codegen.transcendental import payne_hanek_reduction, cody_waite_reduction, frexp, rintk, pow2if
+from tinygrad.codegen.transcendental import TRANSCENDENTAL_SUPPORTED_DTYPES, payne_hanek_reduction, cody_waite_reduction, frexp, rintk, pow2if, xpow
 from test.helpers import eval_uop
 
 class TestTranscendentalFunctions(unittest.TestCase):
@@ -70,5 +71,26 @@ class TestTranscendentalFunctions(unittest.TestCase):
     np.testing.assert_allclose(eval_uop(pow2if(UOp.const(dtypes.int, -10), dtypes.float)), 2**-10)
     np.testing.assert_allclose(eval_uop(pow2if(UOp.const(dtypes.int, -63), dtypes.float)), 2**-63)
 
+class TestVectorizedTranscendetalFunctions(unittest.TestCase):
+  def _check_all_uops_vectorized(self, u:tuple|UOp, vcount:int):
+    # check all UOps in u are vectorized with vcount
+    if isinstance(u, UOp): assert u.dtype.vcount == vcount, f'expected {vcount=} but got {u.dtype.vcount=} for UOp {u=}'
+    [self._check_all_uops_vectorized(x, vcount) for x in (u if isinstance(u, tuple) else u.src)]
+
+  def _get_inputs(self) -> tuple[UOp, DType]:
+    for val in [-2,1.3,194]:
+      for vcount in [1,2,4,19]:
+        for _dtype in TRANSCENDENTAL_SUPPORTED_DTYPES:
+          dtype: DType = _dtype.vec(vcount)
+          d = UOp.const(dtype, val)
+          yield d, dtype
+
+  def test_preserves_vectorization(self):
+    # verify that when given a vectorized (or scalar) input, the function returns a vectorized (or scalar) output
+    for d, dtype in self._get_inputs():
+      self._check_all_uops_vectorized(payne_hanek_reduction(d), dtype.vcount)
+      self._check_all_uops_vectorized(cody_waite_reduction(d), dtype.vcount)
+      self._check_all_uops_vectorized(xpow(d, d), dtype.vcount)
+
 if __name__ == '__main__':
   unittest.main()