diff --git a/test/test_viz.py b/test/test_viz.py
index bfac68b08481..aa4e6e3a6101 100644
--- a/test/test_viz.py
+++ b/test/test_viz.py
@@ -3,7 +3,7 @@
 from tinygrad.dtype import PtrDType, dtypes
 from tinygrad.ops import TRACK_MATCH_STATS, BinaryOps, TrackedPatternMatcher as PatternMatcher, UOp, UOps, UPat, \
     graph_rewrite, contexts, track_rewrites
-from tinygrad.viz.serve import _replace_uop, get_details, get_metadata
+from tinygrad.viz.serve import get_details, get_metadata, uop_to_json
 
 @track_rewrites
 def rewrite(sink:UOp, pm:PatternMatcher, ctx=None): return graph_rewrite(sink, pm, ctx)
@@ -12,14 +12,9 @@ def helper_test_viz(sink:UOp, pm:PatternMatcher, ctx=None) -> List[UOp]:
   rewrite(sink, pm, ctx)
   assert len(contexts) == 1
   assert len(contexts[0][1]) == 1
-  ctx = contexts[0][1][0]
-  uops = [ctx.sink]
-  replaces: Dict[UOp, UOp] = {}
-  for u0,u1,_ in ctx.rewrites:
-    replaces[u0] = u1
-    new_sink = _replace_uop(uops[-1], {**replaces})
-    uops.append(new_sink)
-  return uops[1:]
+  k = get_metadata(contexts)[0][0]
+  g = get_details(*k)
+  return g.graphs[1:]
 
 class TestViz(unittest.TestCase):
   def setUp(self):
@@ -91,12 +86,8 @@ def do_rewrite(key:str, x:UOp):
     self.assertEqual(len(ret), 1)
 
   def test_fold_const(self):
-    pm = PatternMatcher([
-      (UPat.var("x")*1, lambda x:x),
-    ])
     a = UOp(UOps.LOAD, dtypes.int, (UOp(UOps.DEFINE_GLOBAL, PtrDType(dtypes.int), (), 0), UOp.const(dtypes.int, 0)))
-    rewrite(a, pm)
-    graph = get_details(*get_metadata(contexts)[0][0]).graphs[-1]
+    graph = uop_to_json(a)
     assert not any(v[0].startswith("CONST") for v in graph.values())
     assert len([x for x in graph.values() if "CONST" in x[0]]) == 1
 
diff --git a/tinygrad/viz/serve.py b/tinygrad/viz/serve.py
index 4ee84f4f7409..4b73b6c2ce03 100755
--- a/tinygrad/viz/serve.py
+++ b/tinygrad/viz/serve.py
@@ -30,7 +30,7 @@ class GraphRewriteMetadata:
 @dataclass
 class GraphRewriteDetails(GraphRewriteMetadata):
   """Full details about a single call to graph_rewrite"""
-  graphs: List[Dict[int, Tuple[str, str, List[int], str, str]]]
+  graphs: List[UOp]
   """Sink at every step of graph_rewrite"""
   diffs: List[List[str]]
   """.diff style before and after of the rewritten UOp child"""
@@ -52,7 +52,7 @@ def get_metadata(contexts:List[Tuple[Any, List[TrackedRewriteContext]]]) -> List
       kernels[name].append((k, ctx, GraphRewriteMetadata(ctx.loc, lines(ctx.loc[0])[ctx.loc[1]-1].strip(), name, upats)))
   return list(kernels.values())
 
-def _uop_to_json(x:UOp) -> Dict[int, Tuple[str, str, List[int], str, str]]:
+def uop_to_json(x:UOp) -> Dict[int, Tuple[str, str, List[int], str, str]]:
   assert isinstance(x, UOp)
   graph: Dict[int, Tuple[str, str, List[int], str, str]] = {}
   for u in x.sparents:
@@ -69,7 +69,7 @@ def _replace_uop(base:UOp, replaces:Dict[UOp, UOp]) -> UOp:
 @functools.lru_cache(None)
 def _prg(k:Optional[Kernel]) -> Optional[str]: return k.to_program().src if isinstance(k, Kernel) else None
 def get_details(k:Any, ctx:TrackedRewriteContext, metadata:GraphRewriteMetadata) -> GraphRewriteDetails:
-  g = GraphRewriteDetails(**asdict(metadata), graphs=[_uop_to_json(ctx.sink)], diffs=[], changed_nodes=[], kernel_code=_prg(k))
+  g = GraphRewriteDetails(**asdict(metadata), graphs=[ctx.sink], diffs=[], changed_nodes=[], kernel_code=_prg(k))
   replaces: Dict[UOp, UOp] = {}
   sink = ctx.sink
   for i,(u0,u1,upat) in enumerate(ctx.rewrites):
@@ -82,7 +82,7 @@ def get_details(k:Any, ctx:TrackedRewriteContext, metadata:GraphRewriteMetadata)
     # update ret data
     g.changed_nodes.append([id(x) for x in u1.sparents if x.op is not UOps.CONST])
     g.diffs.append(list(difflib.unified_diff(str(u0).splitlines(), str(u1).splitlines())))
-    g.graphs.append(_uop_to_json(sink:=new_sink))
+    g.graphs.append(sink:=new_sink)
   return g
 
 # ** HTTP server
@@ -101,7 +101,8 @@ def do_GET(self):
       self.end_headers()
       query = parse_qs(url.query)
       if (qkernel:=query.get("kernel")) is not None:
-        ret = json.dumps(asdict(get_details(*kernels[int(qkernel[0])][int(query["idx"][0])]))).encode()
+        g = get_details(*kernels[int(qkernel[0])][int(query["idx"][0])])
+        ret = json.dumps({**asdict(g), "graphs": list(map(uop_to_json, g.graphs))}).encode()
       else: ret = json.dumps([list(map(lambda x:asdict(x[2]), v)) for v in kernels]).encode()
     else:
       self.send_response(404)