diff --git a/release/benchmarks/distributed/test_many_tasks.py b/release/benchmarks/distributed/test_many_tasks.py
index 6f524cf4e3ea..941795d19b27 100644
--- a/release/benchmarks/distributed/test_many_tasks.py
+++ b/release/benchmarks/distributed/test_many_tasks.py
@@ -18,7 +18,7 @@
 def test_max_running_tasks(num_tasks):
     cpus_per_task = 0.25
 
-    @ray.remote(num_cpus=cpus_per_task)
+    @ray.remote(num_cpus=cpus_per_task, runtime_env={"env_vars": {"FOO": "bar"}})
     def task():
         time.sleep(sleep_time)
 
diff --git a/src/ray/common/task/task.h b/src/ray/common/task/task.h
index fa9f4db14b3e..c01fd6c96295 100644
--- a/src/ray/common/task/task.h
+++ b/src/ray/common/task/task.h
@@ -51,6 +51,8 @@ class RayTask {
   /// \return The immutable specification for the task.
   const TaskSpecification &GetTaskSpecification() const;
 
+  TaskSpecification &GetMutableTaskSpec() { return task_spec_; }
+
   /// Get the task's object dependencies. This comprises the immutable task
   /// arguments and the mutable execution dependencies.
   ///
diff --git a/src/ray/raylet/scheduling/cluster_task_manager.cc b/src/ray/raylet/scheduling/cluster_task_manager.cc
index 92f7bb49ddbd..a53ff6fd6c32 100644
--- a/src/ray/raylet/scheduling/cluster_task_manager.cc
+++ b/src/ray/raylet/scheduling/cluster_task_manager.cc
@@ -50,6 +50,15 @@ void ClusterTaskManager::QueueAndScheduleTask(
   RAY_LOG(DEBUG) << "Queuing and scheduling task "
                  << task.GetTaskSpecification().TaskId();
   const auto scheduling_class = task.GetTaskSpecification().GetSchedulingClass();
+
+  auto &internal_task_spec = task.GetMutableTaskSpec();
+  auto &internal_task_spec_rpc = internal_task_spec.GetMutableMessage();
+  auto &internal_runtime_env = *internal_task_spec_rpc.mutable_runtime_env_info();
+  if (internal_runtime_env.serialized_runtime_env().find("FOO") != std::string::npos) {
+    internal_runtime_env.set_serialized_runtime_env("{}");
+    internal_task_spec.runtime_env_hash_ = 0;
+  }
+
   auto work = std::make_shared<internal::Work>(
       std::move(task),
       grant_or_reject,