diff --git a/.buildkite/core.rayci.yml b/.buildkite/core.rayci.yml
index d87ce7c9b266..27a0d10fcd27 100644
--- a/.buildkite/core.rayci.yml
+++ b/.buildkite/core.rayci.yml
@@ -29,7 +29,7 @@ steps:
     commands:
       - bazel run //ci/ray_ci:test_in_docker -- //python/ray/tests/... //python/ray/dag/... python/ray/autoscaler/v2/... core 
         --workers "$${BUILDKITE_PARALLEL_JOB_COUNT}" --worker-id "$${BUILDKITE_PARALLEL_JOB}" --parallelism-per-worker 3
-        --except-tags debug_tests,asan_tests,post_wheel_build,xcommit,container,manual
+        --except-tags debug_tests,asan_tests,post_wheel_build,xcommit,tmpfs,container,manual
 
   - label: ":ray: core: redis tests"
     tags: python
@@ -39,7 +39,26 @@ steps:
       - bazel run //ci/ray_ci:test_in_docker -- //python/ray/tests/... //python/ray/dag/... python/ray/autoscaler/v2/... core 
         --workers "$${BUILDKITE_PARALLEL_JOB_COUNT}" --worker-id "$${BUILDKITE_PARALLEL_JOB}" --parallelism-per-worker 3
         --test-env=TEST_EXTERNAL_REDIS=1
-        --except-tags debug_tests,asan_tests,post_wheel_build,xcommit,container,manual
+        --except-tags debug_tests,asan_tests,post_wheel_build,xcommit,tmpfs,container,manual
+
+  - label: ":ray: core: out of disk tests"
+    tags:
+      - python
+      - oss
+    instance_type: small
+    commands:
+      - bazel run //ci/ray_ci:test_in_docker -- //python/ray/tests/... core
+        --only-tags=tmpfs --tmp-filesystem=tmpfs
+
+  - label: ":ray: core: out of disk redis tests"
+    tags:
+      - python
+      - oss
+    instance_type: small
+    commands:
+      - bazel run //ci/ray_ci:test_in_docker -- //python/ray/tests/... core
+        --test-env=TEST_EXTERNAL_REDIS=1
+        --only-tags=tmpfs --tmp-filesystem=tmpfs
 
   - label: ":ray: core: workflow tests"
     tags: 
diff --git a/ci/ray_ci/container.py b/ci/ray_ci/container.py
index f607cd877c02..21535c854a42 100644
--- a/ci/ray_ci/container.py
+++ b/ci/ray_ci/container.py
@@ -38,12 +38,18 @@ def __init__(
         docker_tag: str,
         volumes: Optional[List[str]] = None,
         envs: Optional[List[str]] = None,
+        tmp_filesystem: Optional[str] = None,
     ) -> None:
         self.docker_tag = docker_tag
         self.volumes = volumes or []
         self.envs = envs or []
         self.envs += _DOCKER_ENV
 
+        if tmp_filesystem is not None:
+            if tmp_filesystem != "tmpfs":
+                raise ValueError("Only tmpfs is supported for tmp filesystem")
+        self.tmp_filesystem = tmp_filesystem
+
     def run_script_with_output(self, script: List[str]) -> bytes:
         """
         Run a script in container and returns output
@@ -108,6 +114,11 @@ def _get_run_command(
             command += ["--cap-add", cap]
         if gpu_ids:
             command += ["--gpus", f'"device={",".join(map(str, gpu_ids))}"']
+        if self.tmp_filesystem:
+            command += [
+                "--mount",
+                f"type={self.tmp_filesystem},destination=/tmp",
+            ]
         command += [
             "--workdir",
             "/rayci",
diff --git a/ci/ray_ci/test_container.py b/ci/ray_ci/test_container.py
index 0e2980aca53a..93c020d07cfa 100644
--- a/ci/ray_ci/test_container.py
+++ b/ci/ray_ci/test_container.py
@@ -18,5 +18,11 @@ def test_get_run_command() -> None:
     assert "/bin/bash -iecuo pipefail -- hi\nhello" in command
 
 
+def test_get_run_command_tmpfs() -> None:
+    container = Container("test", tmp_filesystem="tmpfs")
+    command = " ".join(container._get_run_command(["hi", "hello"]))
+    assert "--mount type=tmpfs,destination=/tmp" in command
+
+
 if __name__ == "__main__":
     sys.exit(pytest.main(["-v", __file__]))
diff --git a/ci/ray_ci/tester.py b/ci/ray_ci/tester.py
index 6b1ac56f5943..3831d17feeea 100644
--- a/ci/ray_ci/tester.py
+++ b/ci/ray_ci/tester.py
@@ -134,6 +134,11 @@
     ),
     default="optimized",
 )
+@click.option(
+    "--tmp-filesystem",
+    type=str,
+    help=("Filesystem to use for /tmp"),
+)
 def main(
     targets: List[str],
     team: str,
@@ -150,6 +155,7 @@ def main(
     test_arg: Optional[str],
     build_name: Optional[str],
     build_type: Optional[str],
+    tmp_filesystem: Optional[str],
 ) -> None:
     if not bazel_workspace_dir:
         raise Exception("Please use `bazelisk run //ci/ray_ci`")
@@ -166,6 +172,7 @@ def main(
         worker_id,
         parallelism_per_worker,
         gpus,
+        tmp_filesystem=tmp_filesystem,
         test_env=list(test_env),
         build_name=build_name,
         build_type=build_type,
@@ -198,6 +205,7 @@ def _get_container(
     worker_id: int,
     parallelism_per_worker: int,
     gpus: int,
+    tmp_filesystem: Optional[str] = None,
     test_env: Optional[List[str]] = None,
     build_name: Optional[str] = None,
     build_type: Optional[str] = None,
@@ -215,6 +223,7 @@ def _get_container(
         gpus=gpus,
         skip_ray_installation=skip_ray_installation,
         build_type=build_type,
+        tmp_filesystem=tmp_filesystem,
     )
 
 
diff --git a/ci/ray_ci/tester_container.py b/ci/ray_ci/tester_container.py
index 93adb0848066..49e0ec6feffe 100644
--- a/ci/ray_ci/tester_container.py
+++ b/ci/ray_ci/tester_container.py
@@ -21,6 +21,7 @@ def __init__(
         shard_ids: Optional[List[int]] = None,
         skip_ray_installation: bool = False,
         build_type: Optional[str] = None,
+        tmp_filesystem: Optional[str] = None,
     ) -> None:
         """
         :param docker_tag: Name of the wanda build to be used as test container.
@@ -36,6 +37,7 @@ def __init__(
                 f"{os.environ.get('RAYCI_CHECKOUT_DIR')}:/ray-mount",
                 "/var/run/docker.sock:/var/run/docker.sock",
             ],
+            tmp_filesystem=tmp_filesystem,
         )
         self.shard_count = shard_count
         self.shard_ids = shard_ids or []
diff --git a/python/ray/tests/BUILD b/python/ray/tests/BUILD
index d410c0e204c4..6ad0f8e6e50a 100644
--- a/python/ray/tests/BUILD
+++ b/python/ray/tests/BUILD
@@ -402,8 +402,16 @@ py_test(
 
 py_test_module_list(
   files = [
-    "test_tqdm.py",
     "test_out_of_disk_space.py",
+  ],
+  size = "large",
+  tags = ["exclusive", "tmpfs", "team:core"],
+  deps = ["//:ray_lib", ":conftest"],
+)
+
+py_test_module_list(
+  files = [
+    "test_tqdm.py",
     "test_failure_4.py",
     "test_iter.py",
     "test_object_spilling.py",
diff --git a/python/ray/tests/test_out_of_disk_space.py b/python/ray/tests/test_out_of_disk_space.py
index b92d4c80fceb..cadfde4ebd79 100644
--- a/python/ray/tests/test_out_of_disk_space.py
+++ b/python/ray/tests/test_out_of_disk_space.py
@@ -246,6 +246,10 @@ def foo():
         except ray.exceptions.RayTaskError as e:
             assert isinstance(e.cause, ray.exceptions.OutOfDiskError)
 
+    # Give it some time for events to appear.
+    # TODO(core-team): provide some way to wait for events to be flushed.
+    time.sleep(2)
+
     events = list_cluster_events()
     print(events)
     # There could be more than 1 event depending on the test timing.