diff --git a/dask_cuda/tests/test_explicit_comms.py b/dask_cuda/tests/test_explicit_comms.py
index d9cd6dfb..bd677022 100644
--- a/dask_cuda/tests/test_explicit_comms.py
+++ b/dask_cuda/tests/test_explicit_comms.py
@@ -17,7 +17,7 @@
 import dask_cuda
 from dask_cuda.explicit_comms import comms
 from dask_cuda.explicit_comms.dataframe.shuffle import shuffle as explicit_comms_shuffle
-from dask_cuda.local_cuda_cluster import IncreasedCloseTimeoutNanny
+from dask_cuda.utils_test import IncreasedCloseTimeoutNanny
 
 mp = mp.get_context("spawn")  # type: ignore
 ucp = pytest.importorskip("ucp")
diff --git a/dask_cuda/tests/test_initialize.py b/dask_cuda/tests/test_initialize.py
index 60c7a798..05b72f99 100644
--- a/dask_cuda/tests/test_initialize.py
+++ b/dask_cuda/tests/test_initialize.py
@@ -10,6 +10,7 @@
 
 from dask_cuda.initialize import initialize
 from dask_cuda.utils import get_ucx_config
+from dask_cuda.utils_test import IncreasedCloseTimeoutNanny
 
 mp = mp.get_context("spawn")  # type: ignore
 ucp = pytest.importorskip("ucp")
@@ -29,6 +30,7 @@ def _test_initialize_ucx_tcp():
         n_workers=1,
         threads_per_worker=1,
         processes=True,
+        worker_class=IncreasedCloseTimeoutNanny,
         config={"distributed.comm.ucx": get_ucx_config(**kwargs)},
     ) as cluster:
         with Client(cluster) as client:
@@ -64,6 +66,7 @@ def _test_initialize_ucx_nvlink():
         n_workers=1,
         threads_per_worker=1,
         processes=True,
+        worker_class=IncreasedCloseTimeoutNanny,
         config={"distributed.comm.ucx": get_ucx_config(**kwargs)},
     ) as cluster:
         with Client(cluster) as client:
@@ -100,6 +103,7 @@ def _test_initialize_ucx_infiniband():
         n_workers=1,
         threads_per_worker=1,
         processes=True,
+        worker_class=IncreasedCloseTimeoutNanny,
         config={"distributed.comm.ucx": get_ucx_config(**kwargs)},
     ) as cluster:
         with Client(cluster) as client:
@@ -138,6 +142,7 @@ def _test_initialize_ucx_all():
         n_workers=1,
         threads_per_worker=1,
         processes=True,
+        worker_class=IncreasedCloseTimeoutNanny,
         config={"distributed.comm.ucx": get_ucx_config()},
     ) as cluster:
         with Client(cluster) as client:
diff --git a/dask_cuda/tests/test_proxify_host_file.py b/dask_cuda/tests/test_proxify_host_file.py
index 2e3f8269..191f62fe 100644
--- a/dask_cuda/tests/test_proxify_host_file.py
+++ b/dask_cuda/tests/test_proxify_host_file.py
@@ -19,6 +19,7 @@
 from dask_cuda.proxify_host_file import ProxifyHostFile
 from dask_cuda.proxy_object import ProxyObject, asproxy, unproxy
 from dask_cuda.utils import get_device_total_memory
+from dask_cuda.utils_test import IncreasedCloseTimeoutNanny
 
 cupy = pytest.importorskip("cupy")
 cupy.cuda.set_allocator(None)
@@ -393,7 +394,10 @@ def is_proxy_object(x):
 
     with dask.config.set(jit_unspill_compatibility_mode=compatibility_mode):
         async with dask_cuda.LocalCUDACluster(
-            n_workers=1, jit_unspill=True, asynchronous=True
+            n_workers=1,
+            jit_unspill=True,
+            worker_class=IncreasedCloseTimeoutNanny,
+            asynchronous=True,
         ) as cluster:
             async with Client(cluster, asynchronous=True) as client:
                 ddf = dask.dataframe.from_pandas(
diff --git a/dask_cuda/tests/test_proxy.py b/dask_cuda/tests/test_proxy.py
index c779a39e..8de56a5c 100644
--- a/dask_cuda/tests/test_proxy.py
+++ b/dask_cuda/tests/test_proxy.py
@@ -23,6 +23,7 @@
 from dask_cuda.disk_io import SpillToDiskFile
 from dask_cuda.proxify_device_objects import proxify_device_objects
 from dask_cuda.proxify_host_file import ProxifyHostFile
+from dask_cuda.utils_test import IncreasedCloseTimeoutNanny
 
 # Make the "disk" serializer available and use a directory that are
 # remove on exit.
@@ -422,6 +423,7 @@ def task(x):
     async with dask_cuda.LocalCUDACluster(
         n_workers=1,
         protocol=protocol,
+        worker_class=IncreasedCloseTimeoutNanny,
         asynchronous=True,
     ) as cluster:
         async with Client(cluster, asynchronous=True) as client:
diff --git a/dask_cuda/tests/test_spill.py b/dask_cuda/tests/test_spill.py
index 6172b0bc..f8df7e04 100644
--- a/dask_cuda/tests/test_spill.py
+++ b/dask_cuda/tests/test_spill.py
@@ -12,6 +12,7 @@
 from distributed.utils_test import gen_cluster, gen_test, loop  # noqa: F401
 
 from dask_cuda import LocalCUDACluster, utils
+from dask_cuda.utils_test import IncreasedCloseTimeoutNanny
 
 if utils.get_device_total_memory() < 1e10:
     pytest.skip("Not enough GPU memory", allow_module_level=True)
@@ -160,6 +161,7 @@ async def test_cupy_cluster_device_spill(params):
             asynchronous=True,
             device_memory_limit=params["device_memory_limit"],
             memory_limit=params["memory_limit"],
+            worker_class=IncreasedCloseTimeoutNanny,
         ) as cluster:
             async with Client(cluster, asynchronous=True) as client:
 
@@ -263,6 +265,7 @@ async def test_cudf_cluster_device_spill(params):
             asynchronous=True,
             device_memory_limit=params["device_memory_limit"],
             memory_limit=params["memory_limit"],
+            worker_class=IncreasedCloseTimeoutNanny,
         ) as cluster:
             async with Client(cluster, asynchronous=True) as client: