diff --git a/holoviews/tests/core/data/test_daskinterface.py b/holoviews/tests/core/data/test_daskinterface.py
index ceb8fed5fd..68b758490a 100644
--- a/holoviews/tests/core/data/test_daskinterface.py
+++ b/holoviews/tests/core/data/test_daskinterface.py
@@ -13,20 +13,18 @@
 from holoviews.core.util import PANDAS_VERSION
 from holoviews.util.transform import dim
 
-from ...utils import DASK_VERSION, dask_setup, dask_switcher
 from .test_pandasinterface import BasePandasInterfaceTests
 
-classic, expr = dask_setup()
 
-
-class _DaskDatasetTest(BasePandasInterfaceTests):
+class DaskDatasetTest(BasePandasInterfaceTests):
     """
     Test of the pandas DaskDataset interface.
     """
 
     datatype = 'dask'
+    data_type = dd.DataFrame
 
-    __test__ = False
+    __test__ = True
 
     # Disabled tests for NotImplemented methods
     def test_dataset_add_dimensions_values_hm(self):
@@ -130,38 +128,6 @@ def test_select_expression_lazy(self):
         self.assertIsInstance(new_ds.data, dd.DataFrame)
         self.assertEqual(new_ds.data.compute(), df[df.b == 10])
 
-
-class DaskClassicDatasetTest(_DaskDatasetTest):
-
-    # No longer supported from Dask 2025.1
-
-    data_type = getattr(dd.core, "DataFrame", None)
-
-    __test__ = classic
-
-    @dask_switcher(query=False)
-    def setUp(self):
-        return super().setUp()
-
-
-class DaskExprDatasetTest(_DaskDatasetTest):
-
-    __test__ = expr
-
-    @property
-    def data_type(self):
-        # Only available from 2025.1 and forward
-        if DASK_VERSION >= (2025, 1, 0):
-            return dd.DataFrame
-        else:
-            import dask_expr
-
-            return dask_expr.DataFrame
-
-    @dask_switcher(query=True)
-    def setUp(self):
-        return super().setUp()
-
     def test_dataset_groupby(self):
         # Dask-expr unique sort the order when running unique on column
         super().test_dataset_groupby(sort=True)
diff --git a/holoviews/tests/core/data/test_spatialpandas.py b/holoviews/tests/core/data/test_spatialpandas.py
index c54e54829d..d020b5c1af 100644
--- a/holoviews/tests/core/data/test_spatialpandas.py
+++ b/holoviews/tests/core/data/test_spatialpandas.py
@@ -33,7 +33,6 @@
 from holoviews.element import Path, Points, Polygons
 from holoviews.element.comparison import ComparisonTestCase
 
-from ...utils import dask_switcher
 from .test_multiinterface import GeomTests
 
 
@@ -249,7 +248,7 @@ def test_geometry_array_constructor(self):
         self.assertIsInstance(path.data.geometry.dtype, MultiPolygonDtype)
 
 
-class DaskSpatialPandasBaseTest(GeomTests, RoundTripTests):
+class DaskSpatialPandasTest(GeomTests, RoundTripTests):
     """
     Test of the DaskSpatialPandasInterface.
     """
@@ -258,7 +257,7 @@ class DaskSpatialPandasBaseTest(GeomTests, RoundTripTests):
 
     interface = DaskSpatialPandasInterface
 
-    __test__ = False
+    __test__ = True
 
     def setUp(self):
         if spatialpandas is None:
@@ -302,26 +301,3 @@ def test_dict_dataset_add_dimension_values(self):
 
     def test_sort_by_value(self):
         raise SkipTest("Not supported")
-
-
-class DaskSpatialPandasClassicTest(DaskSpatialPandasBaseTest):
-    """
-    Test of the Classic DaskSpatialPandasInterface, no longer exits since dask 2025.1
-    """
-
-    __test__ = True
-
-    @dask_switcher(query=False, extras=["spatialpandas.dask"])
-    def setUp(self):
-        super().setUp()
-
-class DaskSpatialPandasExprTest(DaskSpatialPandasBaseTest):
-    """
-    Test of the Classic DaskSpatialPandasInterface, no longer exits since dask 2025.1
-    """
-
-    __test__ = True
-
-    @dask_switcher(query=True, extras=["spatialpandas.dask"])
-    def setUp(self):
-        super().setUp()
diff --git a/holoviews/tests/element/test_selection.py b/holoviews/tests/element/test_selection.py
index 2c2361f861..ba9117bfd3 100644
--- a/holoviews/tests/element/test_selection.py
+++ b/holoviews/tests/element/test_selection.py
@@ -32,8 +32,6 @@
 from holoviews.element.selection import spatial_select_columnar
 from holoviews.util.transform import dim
 
-from ..utils import dask_switcher
-
 try:
     import datashader as ds
 except ImportError:
@@ -684,10 +682,9 @@ def pandas_df(self):
         }, dtype=float)
 
 
-    @pytest.fixture(scope="function", params=[pytest.param(True, id='dask-classic'), pytest.param(False, id='dask-expr')])
+    @pytest.fixture(scope="function")
     def dask_df(self, pandas_df, request):
-        with dask_switcher(query=request.param):
-            return dd.from_pandas(pandas_df, npartitions=2)
+        return dd.from_pandas(pandas_df, npartitions=2)
 
     @pytest.fixture(scope="function")
     def _method(self):
diff --git a/holoviews/tests/utils.py b/holoviews/tests/utils.py
index f8699a5287..35c5670886 100644
--- a/holoviews/tests/utils.py
+++ b/holoviews/tests/utils.py
@@ -1,15 +1,9 @@
 import logging
 import os
 import sys
-from contextlib import contextmanager, suppress
-from functools import lru_cache
-from importlib import reload
-from importlib.util import find_spec
 
 import param
-import pytest
 
-from holoviews.core.util import _no_import_version
 from holoviews.element.comparison import ComparisonTestCase
 
 cwd = os.path.abspath(os.path.split(__file__)[0])
@@ -117,64 +111,3 @@ def tearDown(self):
         for level, msgs in messages.items():
             for msg in msgs:
                 log.log(LEVELS[level], msg)
-
-
-DASK_UNAVAILABLE = find_spec("dask") is None
-DASK_VERSION = _no_import_version("dask")
-
-
-@lru_cache
-def dask_setup():
-    """
-    Set-up both dask dataframes, using lru_cahce to only do it once
-
-    """
-    from datashader.data_libraries.dask import bypixel, dask_pipeline
-
-    classic, expr = False, False
-
-    # Removed in Dask 2025.1, and will raise AttributeError
-    if DASK_VERSION < (2025, 1, 0):
-        import dask.dataframe as dd
-
-        bypixel.pipeline.register(dd.core.DataFrame)(dask_pipeline)
-        classic = True
-    else:
-        # dask_expr import below will now fail with:
-        # cannot import name '_Frame' from 'dask.dataframe.core'
-        expr = True
-
-    with suppress(ImportError):
-        import dask_expr
-
-        bypixel.pipeline.register(dask_expr.DataFrame)(dask_pipeline)
-        expr = True
-
-    return classic, expr
-
-
-@contextmanager
-def dask_switcher(*, query=False, extras=None):
-    """
-    Context manager to switch on/off dask-expr query planning.
-
-    Using a context manager as it is an easy way to
-    change the function to a decorator.
-    """
-    if DASK_UNAVAILABLE:
-        pytest.skip("dask is not available")
-
-    classic, expr = dask_setup()
-
-    if not query and not classic:
-        pytest.skip("Classic DataFrame no longer supported by dask")
-    if query and not expr:
-        pytest.skip("dask-expr is not available")
-
-    import dask
-
-    dask.config.set(**{"dataframe.query-planning": query})
-    for module in ("dask.dataframe", *(extras or ())):
-        if module in sys.modules:
-            reload(sys.modules[module])
-    yield
diff --git a/pixi.toml b/pixi.toml
index 14a22fccc7..3677fae2c7 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -82,9 +82,6 @@ PYTHONIOENCODING = "utf-8"
 python = "3.9.*"
 panel = "1.4.*"
 
-[feature.py39.activation.env]
-DASK_DATAFRAME__QUERY_PLANNING = "False"
-
 [feature.py310.dependencies]
 python = "3.10.*"
 bokeh_sampledata = "*"