diff --git a/benchmarl/environments/pettingzoo/simple_push.py b/benchmarl/environments/pettingzoo/simple_push.py
index bdee5e15..d2c37d56 100644
--- a/benchmarl/environments/pettingzoo/simple_push.py
+++ b/benchmarl/environments/pettingzoo/simple_push.py
@@ -11,4 +11,3 @@
 class TaskConfig:
     task: str = MISSING
     max_cycles: int = MISSING
-    local_ratio: float = MISSING
diff --git a/benchmarl/environments/pettingzoo/waterworld.py b/benchmarl/environments/pettingzoo/waterworld.py
index ab81067c..16f310ee 100644
--- a/benchmarl/environments/pettingzoo/waterworld.py
+++ b/benchmarl/environments/pettingzoo/waterworld.py
@@ -26,7 +26,7 @@ class TaskConfig:
     poison_speed: float = MISSING
     poison_reward: float = MISSING
     food_reward: float = MISSING
-    encounter_rewar: float = MISSING
+    encounter_reward: float = MISSING
     thrust_penalty: float = MISSING
     local_ratio: float = MISSING
     speed_features: bool = MISSING
diff --git a/benchmarl/hydra_config.py b/benchmarl/hydra_config.py
index 20f27737..e1465e2a 100644
--- a/benchmarl/hydra_config.py
+++ b/benchmarl/hydra_config.py
@@ -32,7 +32,7 @@ def load_experiment_from_hydra(cfg: DictConfig, task_name: str) -> Experiment:
 
 def load_task_config_from_hydra(cfg: DictConfig, task_name: str) -> Task:
     return task_config_registry[task_name].update_config(
-        OmegaConf.to_container(cfg, resolve=True)
+        OmegaConf.to_container(cfg, resolve=True, throw_on_missing=True)
     )
 
 
@@ -56,5 +56,7 @@ def load_model_config_from_hydra(cfg: DictConfig) -> ModelConfig:
     else:
         model_class = model_config_registry[cfg.name]
         return model_class(
-            **parse_model_config(OmegaConf.to_container(cfg, resolve=True))
+            **parse_model_config(
+                OmegaConf.to_container(cfg, resolve=True, throw_on_missing=True)
+            )
         )