diff --git a/tests/data/test_base.py b/tests/data/test_base.py
index 6806d64..25b50fa 100644
--- a/tests/data/test_base.py
+++ b/tests/data/test_base.py
@@ -9,7 +9,7 @@ class TestCustomGenerator:
     def n(self, request):
         return request.param
 
-    @pytest.fixture()
+    @pytest.fixture
     def function(self, n):
         if n == 0:
 
@@ -28,7 +28,7 @@ def func(a, b):
 
         return func
 
-    @pytest.fixture()
+    @pytest.fixture
     def generator(self, function):
         return du.data.base.CustomGenerator(function)
 
diff --git a/tests/data/test_map.py b/tests/data/test_map.py
index 24d85e4..cd10678 100644
--- a/tests/data/test_map.py
+++ b/tests/data/test_map.py
@@ -14,14 +14,14 @@
 class BaseMapTest:
     cls = None
 
-    @pytest.fixture()
+    @pytest.fixture
     def generator(self):
         return du.data.freud.FreudDescriptor(
             freud.order.Steinhardt(l=SPH_HARM_NUMBER),
             {"particle_order": [str(sph_harm) for sph_harm in SPH_HARM_NUMBER]},
         )
 
-    @pytest.fixture()
+    @pytest.fixture
     def valid_spec(self):  # noqa: PT004
         """Return a valid spec."""
         raise NotImplementedError
@@ -92,7 +92,7 @@ def validate_output(output, compute_arr, passed_args):
 class TestIdentity(BaseMapTest):
     cls = du.data.map.Identity
 
-    @pytest.fixture()
+    @pytest.fixture
     def valid_spec(self):
         return lambda: {}
 
@@ -105,7 +105,7 @@ def validate_output(output, compute_arr, passed_args):
 class TestSpatialAveraging(BaseMapTest):
     cls = du.data.spatial.NeighborAveraging
 
-    @pytest.fixture()
+    @pytest.fixture
     def valid_spec(self):
         return lambda: {"expected_kwarg": "neighbors", "remove_kwarg": False}
 
@@ -131,7 +131,7 @@ def validate_output(output, compute_arr, passed_args):
 class TestTee(BaseMapTest):
     cls = du.data.map.Tee
 
-    @pytest.fixture()
+    @pytest.fixture
     def valid_spec(self):
         def spec():
             return {
@@ -160,7 +160,7 @@ def validate_output(output, compute_arr, passed_args):
 class TestCustomMap(BaseMapTest):
     cls = du.data.base.CustomMap
 
-    @pytest.fixture()
+    @pytest.fixture
     def valid_spec(self):
         def double(arr):
             return {"doubled": arr * 2}
diff --git a/tests/data/test_reduce.py b/tests/data/test_reduce.py
index 143a4bc..dd28f43 100644
--- a/tests/data/test_reduce.py
+++ b/tests/data/test_reduce.py
@@ -35,11 +35,11 @@ def _pairwise(a):
 
 def add_reducer_tests(cls, validator):
     class TestReducer:
-        @pytest.fixture()
+        @pytest.fixture
         def constructor_args(self):
             return validator.constructor_args
 
-        @pytest.fixture()
+        @pytest.fixture
         def base_generator(self):
             @du.data.make_generator
             def generator():
diff --git a/tests/preprocessing/test_filter.py b/tests/preprocessing/test_filter.py
index d3eca0c..bd61605 100644
--- a/tests/preprocessing/test_filter.py
+++ b/tests/preprocessing/test_filter.py
@@ -14,7 +14,7 @@ class TestMeanShift:
     def get_shift_range(self, min_, max_):
         return (min_ * self.min_mean_shift, max_ * self.min_mean_shift)
 
-    @pytest.fixture()
+    @pytest.fixture
     def mean_shift(self):
         return du.preprocessing.filter.MeanShift(self.sensitivity)
 
@@ -155,7 +155,7 @@ def check_equivalent_labels(self, a, b):
         for i, j in map_.items():
             assert not np.any((a == i) != (b == j))
 
-    @pytest.fixture()
+    @pytest.fixture
     def correlated(self):
         return du.preprocessing.filter.Correlated(max_clusters=5)
 
diff --git a/tests/preprocessing/test_supervised.py b/tests/preprocessing/test_supervised.py
index 360895f..45217eb 100644
--- a/tests/preprocessing/test_supervised.py
+++ b/tests/preprocessing/test_supervised.py
@@ -82,7 +82,7 @@ def signal_with_mean_shift(seeds):
     return rpt.pw_constant(100, 2, 1, 0.5, delta=(3, 5), seed=seeds())
 
 
-@pytest.fixture()
+@pytest.fixture
 def window():
     classifier = sk.tree.DecisionTreeClassifier(max_depth=1)
     return du.preprocessing.supervised.Window(
@@ -97,7 +97,7 @@ def test_compute(window, signal_with_mean_shift):
     assert abs(error.argmin() - change_point[0]) <= max_allowed_error
 
 
-@pytest.fixture()
+@pytest.fixture
 def random_signal(rng):
     return rng.uniform(-500_000, 500_000, size=20).reshape((-1, 1))