diff --git a/sdk/load-and-run/dump_with_testcase_mge.py b/sdk/load-and-run/dump_with_testcase_mge.py
index 9aafe3f564d5c3afef45733ecfac4a26a5fcc188..36c2bde90d3870c041c61739c1c2e55c84b76247 100755
--- a/sdk/load-and-run/dump_with_testcase_mge.py
+++ b/sdk/load-and-run/dump_with_testcase_mge.py
@@ -20,7 +20,6 @@ import megengine.core.tensor.megbrain_graph as G
 from megengine import tensor
 from megengine.core._imperative_rt.core2 import apply
 from megengine.core.ops import builtin
-from megengine.core.tensor.megbrain_graph import VarNode
 from megengine.utils import comp_graph_tools as cgtools
 
 logger = mge.get_logger(__name__)
@@ -268,8 +267,8 @@ def make_feeds(args):
 
         def assert_equal(expect, real, **kwargs):
             op = builtin.AssertEqual(**kwargs)
-            (res,) = G.apply_normal_varnode(op, expect, real)
-            return G.VarNode(res)
+            (res,) = apply(op, expect, real)
+            return res
 
         verbose = not args.silent
 
@@ -284,8 +283,8 @@ def make_feeds(args):
             # insert assert opr to check expect and real.
             outputs_new.append(
                 assert_equal(
-                    G.VarNode(expect_get),
-                    G.VarNode(i),
+                    expect_get,
+                    i,
                     verbose=verbose,
                     maxerr=args.maxerr,
                 )
@@ -297,29 +296,26 @@ def make_feeds(args):
 
 
 def optimize_for_inference(args, outputs):
-    args_map = {
-        "enable_io16xc32": "f16_io_f32_comp",
-        "enable_ioc16": "f16_io_comp",
-        "enable_hwcd4": "use_nhwcd4",
-        "enable_nchw4": "use_nchw4",
-        "enable_nchw88": "use_nchw88",
-        "enable_nchw44": "use_nchw44",
-        "enable_nchw44_dot": "use_nchw44_dot",
-        "enable_nchw32": "use_nchw32",
-        "enable_chwn4": "use_chwn4",
-        "enable_fuse_conv_bias_nonlinearity": "fuse_conv_bias_nonlinearity",
-        "enable_fuse_conv_bias_with_z": "fuse_conv_bias_with_z",
-    }
+    args_list = [
+        "enable_io16xc32",
+        "enable_ioc16",
+        "enable_hwcd4",
+        "enable_nchw4",
+        "enable_nchw88",
+        "enable_nchw44",
+        "enable_nchw44_dot",
+        "enable_nchw32",
+        "enable_chwn4",
+        "enable_fuse_conv_bias_nonlinearity",
+        "enable_fuse_conv_bias_with_z",
+    ]
     kwargs = {}
-    for k, v in args_map.items():
+    for k in args_list:
         if getattr(args, k):
-            assert (
-                args.optimize_for_inference
-            ), "optimize_for_inference should be set when {} is given".format(k)
-            kwargs[v] = True
+            kwargs[k] = True
 
     if args.optimize_for_inference:
-        outputs = [i._node for i in G.optimize_for_inference(outputs, **kwargs)]
+        outputs = G.optimize_for_inference(outputs, **kwargs)
 
     return outputs
 
@@ -476,7 +472,6 @@ def main():
 
     output_mgbvars = feeds["outputs"]
     output_mgbvars = optimize_for_inference(args, output_mgbvars)
-    output_mgbvars = [var._node for var in output_mgbvars]
 
     inputs = cgtools.get_dep_vars(output_mgbvars, "Host2DeviceCopy")
     inputs = sorted((i.name, i.dtype) for i in inputs)
@@ -491,12 +486,8 @@ def main():
     with open(args.output, "wb") as fout:
         fout.write(b"mgbtest0")
         fout.write(struct.pack("I", len(feeds["testcases"])))
-        if isinstance(output_mgbvars, dict):
-            wrap_output_vars = dict([(i, VarNode(j)) for i, j in output_mgbvars])
-        else:
-            wrap_output_vars = [VarNode(i) for i in output_mgbvars]
         dump_content, stat = G.dump_graph(
-            wrap_output_vars,
+            output_mgbvars,
             append_json=True,
             strip_info_file=strip_info_file,
             **sereg_kwargs,