diff --git a/robohive/envs/myo/assets/myo_relief.npy b/robohive/envs/myo/assets/myo_relief.npy
new file mode 100644
index 00000000..7038cef0
Binary files /dev/null and b/robohive/envs/myo/assets/myo_relief.npy differ
diff --git a/robohive/envs/myo/myochallenge/chasetag_v0.py b/robohive/envs/myo/myochallenge/chasetag_v0.py
index c2806f09..28568857 100644
--- a/robohive/envs/myo/myochallenge/chasetag_v0.py
+++ b/robohive/envs/myo/myochallenge/chasetag_v0.py
@@ -10,6 +10,7 @@
 import os
 from enum import Enum
 
+from robohive.envs.myo.base_v0 import BaseV0
 from robohive.envs.myo.myobase.walk_v0 import WalkEnvV0
 from robohive.utils.quat_math import quat2euler, euler2mat, euler2quat
 
@@ -374,7 +375,8 @@ def __init__(self, model_path, obsd_model_path=None, seed=None, **kwargs):
         # first construct the inheritance chain, which is just __init__ calls all the way down, with env_base
         # creating the sim / sim_obsd instances. Next we run through "setup"  which relies on sim / sim_obsd
         # created in __init__ to complete the setup.
-        super().__init__(model_path=model_path, obsd_model_path=obsd_model_path, seed=seed)
+        # base().__init__(model_path=model_path, obsd_model_path=obsd_model_path, seed=seed)
+        BaseV0.__init__(self, model_path=model_path, obsd_model_path=obsd_model_path, seed=seed, env_credits=self.MYO_CREDIT)
         self._setup(**kwargs)
 
     def _setup(self,
diff --git a/robohive/tests/test_myo.py b/robohive/tests/test_myo.py
index 8980856f..a8823572 100644
--- a/robohive/tests/test_myo.py
+++ b/robohive/tests/test_myo.py
@@ -16,7 +16,7 @@ def test_myosuite_envs(self):
         self.check_envs('MyoBase Suite', robohive_myobase_suite)
 
 
-    def no_test_myochal_envs(self):
+    def test_myochal_envs(self):
         self.check_envs('MyoChallenge Suite', robohive_myochal_suite)