diff --git a/testground/README.md b/testground/README.md
index c52b153efe..40018edbb1 100644
--- a/testground/README.md
+++ b/testground/README.md
@@ -1,13 +1,20 @@
-# Guide
-
 [Testground documentation](https://docs.testground.ai/)
 
-## Getting started
+## Build Image
+
+>  Prerequisites: nix, for macOS also need [linux remote builder](https://nix.dev/manual/nix/2.22/advanced-topics/distributed-builds.html)
+
+You can test with the prebuilt images in [github registry](https://github.com/crypto-org-chain/cronos/pkgs/container/cronos-testground), or build the image locally:
 
-### Prerequisites
+```bash
+$ nix build .#testground-image
+# for mac: nix build .#legacyPackages.aarch64-linux.testground-image
+$ docker load < ./result
+Loaded image: cronos-testground:<imageID>
+$ docker tag cronos-testground:<imageID> ghcr.io/crypto-org-chain/cronos-testground:latest
+```
 
-- docker
-- go 1.22, or higher
+## Run Test
 
 ### Install Testground
 
@@ -20,7 +27,7 @@ $ make install
 
 It'll install the `testground` binary in your `$GOPATH/bin` directory, and build several docker images.
 
-### Running Testground
+### Run Testground Daemon
 
 ```bash
 $ TESTGROUND_HOME=$PWD/data testground daemon
@@ -28,7 +35,7 @@ $ TESTGROUND_HOME=$PWD/data testground daemon
 
 Keep the daemon process running during the test.
 
-### Running Test Plan
+### Run Test Plan
 
 Import the test plan before the first run:
 
diff --git a/testground/benchmark/benchmark/cli.py b/testground/benchmark/benchmark/cli.py
index a86912c0b1..6ceed40128 100644
--- a/testground/benchmark/benchmark/cli.py
+++ b/testground/benchmark/benchmark/cli.py
@@ -9,21 +9,28 @@ def __init__(self, cmd):
     def raw(self, *args, stdin=None, stderr=subprocess.STDOUT, **kwargs):
         "execute the command"
         args = " ".join(build_cli_args_safe(*args, **kwargs))
-        return interact(
+        stdout = interact(
             f"{self.cmd} {args}", input=stdin, stderr=stderr, env=os.environ
         )
 
+        # filter out "<jemalloc>:" warning messages
+        stdout = b"\n".join(
+            line for line in stdout.splitlines() if not line.startswith(b"<jemalloc>:")
+        )
+
+        return stdout
+
     def __call__(self, *args, **kwargs):
         "execute the command and clean the output"
         return self.raw(*args, **kwargs).decode().strip()
 
 
-def interact(cmd, ignore_error=False, input=None, **kwargs):
-    kwargs.setdefault("stderr", subprocess.STDOUT)
+def interact(cmd, ignore_error=False, input=None, stderr=subprocess.STDOUT, **kwargs):
     proc = subprocess.Popen(
         cmd,
         stdin=subprocess.PIPE,
         stdout=subprocess.PIPE,
+        stderr=stderr,
         shell=True,
         **kwargs,
     )
diff --git a/testground/benchmark/compositions/local.toml b/testground/benchmark/compositions/local.toml
index ba24473eb3..4d710e2955 100644
--- a/testground/benchmark/compositions/local.toml
+++ b/testground/benchmark/compositions/local.toml
@@ -6,7 +6,7 @@ author = "core-app"
 plan = "benchmark"
 case = "entrypoint"
 total_instances = 10
-builder = "docker:nix"
+builder = "docker:go" # not used
 runner = "local:docker"
 disable_metrics = false
 
@@ -16,12 +16,14 @@ halt_height = "5"
 
 [[groups]]
 id = "validators"
-builder = "docker:nix"
 [groups.instances]
 count = 3
+[groups.run]
+artifact = "ghcr.io/crypto-org-chain/cronos-testground:latest"
 
 [[groups]]
 id = "fullnodes"
-builder = "docker:nix"
 [groups.instances]
 count = 7
+[groups.run]
+artifact = "ghcr.io/crypto-org-chain/cronos-testground:latest"
diff --git a/testground/benchmark/manifest.toml b/testground/benchmark/manifest.toml
index 9184c54e7c..b9d3afbb0c 100644
--- a/testground/benchmark/manifest.toml
+++ b/testground/benchmark/manifest.toml
@@ -1,12 +1,9 @@
 name = "benchmark"
 
 [defaults]
-builder = "docker:nix"
+builder = "docker:go"
 runner = "local:docker"
 
-[builders."docker:nix"]
-enabled = true
-
 [runners."local:docker"]
 enabled = true