diff --git a/verifiers/envs/experimental/composable/tasksets/swe/multi_swe.py b/verifiers/envs/experimental/composable/tasksets/swe/multi_swe.py
index 78224ae98..d9631099e 100644
--- a/verifiers/envs/experimental/composable/tasksets/swe/multi_swe.py
+++ b/verifiers/envs/experimental/composable/tasksets/swe/multi_swe.py
@@ -141,7 +141,7 @@ def __init__(self, taskset: "MultiSWETaskSet", **kwargs):
         self.add_reward_func(self.solved)
 
     async def solved(self, state, info, **kwargs) -> float:
-        if isinstance(state.get("error"), vf.InfraError):
+        if state.get("error") is not None:
             return 0.0
         sandbox_client = state.get("sandbox_client")
         sandbox_id = state.get("sandbox_id")
diff --git a/verifiers/envs/experimental/composable/tasksets/swe/openswe.py b/verifiers/envs/experimental/composable/tasksets/swe/openswe.py
index c55978bbc..251e4e869 100644
--- a/verifiers/envs/experimental/composable/tasksets/swe/openswe.py
+++ b/verifiers/envs/experimental/composable/tasksets/swe/openswe.py
@@ -42,7 +42,7 @@ def __init__(self, taskset: "OpenSWETaskSet", **kwargs):
         self.add_reward_func(self.solved)
 
     async def solved(self, state, info, **kwargs) -> float:
-        if isinstance(state.get("error"), vf.InfraError):
+        if state.get("error") is not None:
             return 0.0
         sandbox_client = state.get("sandbox_client")
         sandbox_id = state.get("sandbox_id")
diff --git a/verifiers/envs/experimental/composable/tasksets/swe/r2e_gym.py b/verifiers/envs/experimental/composable/tasksets/swe/r2e_gym.py
index 58bb895ec..310948654 100644
--- a/verifiers/envs/experimental/composable/tasksets/swe/r2e_gym.py
+++ b/verifiers/envs/experimental/composable/tasksets/swe/r2e_gym.py
@@ -140,7 +140,7 @@ def __init__(self, taskset: "R2EGymTaskSet", **kwargs):
         self.add_reward_func(self.solved)
 
     async def solved(self, state, info, **kwargs) -> float:
-        if isinstance(state.get("error"), vf.InfraError):
+        if state.get("error") is not None:
             return 0.0
         sandbox_client = state.get("sandbox_client")
         sandbox_id = state.get("sandbox_id")
diff --git a/verifiers/envs/experimental/composable/tasksets/swe/swe_bench.py b/verifiers/envs/experimental/composable/tasksets/swe/swe_bench.py
index fd23147bc..e7c1d8259 100644
--- a/verifiers/envs/experimental/composable/tasksets/swe/swe_bench.py
+++ b/verifiers/envs/experimental/composable/tasksets/swe/swe_bench.py
@@ -313,7 +313,7 @@ def __init__(self, taskset: "SWEBenchTaskSet", **kwargs):
         self.add_reward_func(self.solved)
 
     async def solved(self, state, info, **kwargs) -> float:
-        if isinstance(state.get("error"), vf.InfraError):
+        if state.get("error") is not None:
             return 0.0
         sandbox_client = state.get("sandbox_client")
         sandbox_id = state.get("sandbox_id")
diff --git a/verifiers/envs/experimental/composable/tasksets/swe/swe_lego.py b/verifiers/envs/experimental/composable/tasksets/swe/swe_lego.py
index a3d4d76d7..13cecd871 100644
--- a/verifiers/envs/experimental/composable/tasksets/swe/swe_lego.py
+++ b/verifiers/envs/experimental/composable/tasksets/swe/swe_lego.py
@@ -134,7 +134,7 @@ def __init__(self, taskset: "SWELegoTaskSet", **kwargs):
         self.add_reward_func(self.solved)
 
     async def solved(self, state, info, **kwargs) -> float:
-        if isinstance(state.get("error"), vf.InfraError):
+        if state.get("error") is not None:
             return 0.0
         sandbox_client = state.get("sandbox_client")
         sandbox_id = state.get("sandbox_id")
diff --git a/verifiers/envs/experimental/composable/tasksets/swe/swe_rebench_v2.py b/verifiers/envs/experimental/composable/tasksets/swe/swe_rebench_v2.py
index b94ce47e6..bdd61a2ce 100644
--- a/verifiers/envs/experimental/composable/tasksets/swe/swe_rebench_v2.py
+++ b/verifiers/envs/experimental/composable/tasksets/swe/swe_rebench_v2.py
@@ -190,7 +190,7 @@ def __init__(self, taskset: "SWERebenchV2TaskSet", **kwargs):
         self.add_reward_func(self.solved)
 
     async def solved(self, state, info, **kwargs) -> float:
-        if isinstance(state.get("error"), vf.InfraError):
+        if state.get("error") is not None:
             return 0.0
         sandbox_client = state.get("sandbox_client")
         sandbox_id = state.get("sandbox_id")
diff --git a/verifiers/envs/experimental/composable/tasksets/swe/swe_smith.py b/verifiers/envs/experimental/composable/tasksets/swe/swe_smith.py
index 944464756..7c99228a6 100644
--- a/verifiers/envs/experimental/composable/tasksets/swe/swe_smith.py
+++ b/verifiers/envs/experimental/composable/tasksets/swe/swe_smith.py
@@ -145,7 +145,7 @@ def __init__(self, taskset: "SWESmithTaskSet", **kwargs):
         self.add_reward_func(self.solved)
 
     async def solved(self, state, info, **kwargs) -> float:
-        if isinstance(state.get("error"), vf.InfraError):
+        if state.get("error") is not None:
             return 0.0
         sandbox_client = state.get("sandbox_client")
         sandbox_id = state.get("sandbox_id")