diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 18e0b89883..364a47d3d4 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,4 +1,4 @@
-# on Windows -- $env:SKIP="devicetests,tests,example"
+# on Windows -- $env:SKIP="tests,example"
 repos:
   - repo: local
     hooks:
diff --git a/test/test_uop_graph.py b/test/test_uop_graph.py
index 324276dc44..b488ddac9a 100644
--- a/test/test_uop_graph.py
+++ b/test/test_uop_graph.py
@@ -166,6 +166,17 @@ class TestGraphRewrite(unittest.TestCase):
     self.assertEqual(nout.src[1].op, UOps.CONST)
     self.assertEqual(nout.src[1].arg, 3.0)
 
+  def test_commutative_work(self):
+    a = UOp.variable('a', 0, 1)
+    b = UOp.variable('b', 0, 1)
+    self.assertIs(a+b, b+a)
+
+  def test_consts_go_last_right_away(self):
+    a = UOp.variable('a', 0, 1)
+    tst = 2+a
+    self.assertIs(tst.src[0], a)
+    self.assertIs(tst.src[1], a.const_like(2))
+
   def test_consts_go_last(self):
     a = UOp.variable('a', 0, 1)
     b = UOp.variable('b', 0, 1)
diff --git a/test/test_uops.py b/test/test_uops.py
index cb74c0a15e..332cb9741b 100644
--- a/test/test_uops.py
+++ b/test/test_uops.py
@@ -443,12 +443,12 @@ class TestIndexingOrdering(unittest.TestCase):
 
 class TestUPatHelpers(unittest.TestCase):
   def test_location(self):
-    self.assertEqual(sym.patterns[-1][0].location[0].split("/")[-1], "uopgraph.py")
-    self.assertEqual(to_si.patterns[0][0].location[0].split("/")[-1], "schedule.py")
-    self.assertEqual(spec.patterns[0][0].location[0].split("/")[-1], "ops.py")
+    self.assertEqual(sym.patterns[-1][0].location[0].replace("\\", "/").split("/")[-1], "uopgraph.py")
+    self.assertEqual(to_si.patterns[0][0].location[0].replace("\\", "/").split("/")[-1], "schedule.py")
+    self.assertEqual(spec.patterns[0][0].location[0].replace("\\", "/").split("/")[-1], "ops.py")
     with self.assertRaises(AssertionError): # TODO: location UPat files created in test/*?
       test_upat = UPat(UOps.CONST, dtypes.bool)
-      self.assertEqual(test_upat.location[0].split("/")[-1], __file__.split("/")[-1])
+      self.assertEqual(test_upat.location[0].split("/")[-1], __file__.replace("\\", "/").split("/")[-1])
 
 if __name__ == '__main__':
   unittest.main(verbosity=2)
diff --git a/tinygrad/ops.py b/tinygrad/ops.py
index c05d2ca72f..e816312b12 100644
--- a/tinygrad/ops.py
+++ b/tinygrad/ops.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 from typing import Any, List, Optional, Set, Union, Tuple, Dict, Callable, cast, TYPE_CHECKING, Type, TypeVar, DefaultDict
-import sys, time, functools, itertools, math, operator, hashlib, os, types, pickle
+import sys, time, functools, itertools, math, operator, hashlib, os, types, pickle, pathlib
 from enum import auto, IntEnum, Enum
 from dataclasses import dataclass, field
 from collections import defaultdict
@@ -198,6 +198,7 @@ class UOp(MathTrait):
 
   __slots__ = ["op", "dtype", "src", "arg"]
   def __init__(self, op:UOps, dtype:DType=dtypes.void, src: Tuple[UOp,...]=tuple(), arg:Any=None):
+    if getattr(self, 'op', None) is not None: return
     # TODO: instant check rules here make debugging easier
     #assert op in UOps and isinstance(dtype, DType), f"bad UOp creation with {op} {dtype}"
     #if op is UOps.ALU and arg is BinaryOps.CMPNE: assert dtype.scalar() == dtypes.bool
@@ -494,7 +495,7 @@ def flops_mem(uops:List[UOp], ignore_indexing=False) -> Tuple[sint, sint]:
 def get_location() -> Tuple[str, int]:
   frm = sys._getframe(1)
   # find the real frame in the file that has the UPat, TODO: is there a better way to do this?
-  while frm.f_back is not None and frm.f_back.f_code.co_filename.split("/")[-1] in {"ops.py", "uopgraph.py", "schedule.py", "lowerer.py"}:
+  while frm.f_back is not None and pathlib.Path(frm.f_back.f_code.co_filename).name in {"ops.py", "uopgraph.py", "schedule.py", "lowerer.py"}:
     frm = frm.f_back
   return frm.f_code.co_filename, frm.f_lineno
 @functools.lru_cache(None)