Fix compatibility with pytest 8 (#3903)

Resolves: #3883

Author: frenzymadness

python/ipywidgets/ipywidgets/widgets/tests/test_interaction.py

@@ -19,8 +19,6 @@
 # Utility stuff
 #-----------------------------------------------------------------------------
 
-from .utils import setup, teardown
-
 def f(**kwargs):
     pass
 

python/ipywidgets/ipywidgets/widgets/tests/test_link.py

@@ -4,7 +4,6 @@
 import pytest
 
 from .. import jslink, jsdlink, ToggleButton
-from .utils import setup, teardown
 
 def test_jslink_args():
     with pytest.raises(TypeError):

python/ipywidgets/ipywidgets/widgets/tests/test_send_state.py

@@ -3,7 +3,7 @@
 
 from traitlets import Bool, Tuple, List
 
-from .utils import setup, teardown, DummyComm
+from .utils import setup
 
 from ..widget import Widget
 

python/ipywidgets/ipywidgets/widgets/tests/test_set_state.py

@@ -6,7 +6,7 @@
 
 from traitlets import Bool, Tuple, List, Instance, CFloat, CInt, Float, Int, TraitError, observe
 
-from .utils import setup, teardown
+from .utils import setup
 
 import ipywidgets
 from ipywidgets import Widget

python/ipywidgets/ipywidgets/widgets/tests/utils.py

@@ -12,7 +12,7 @@
     NEW_COMM_PACKAGE = False
 
 import ipykernel.comm
-
+import pytest
 
 class DummyComm():
     comm_id = 'a-b-c-d'
@@ -87,10 +87,10 @@ def teardown_test_comm():
             setattr(Widget, attr, value)
     _widget_attrs.clear()
 
+@pytest.fixture(autouse=True)
 def setup():
     setup_test_comm()
-
-def teardown():
+    yield
     teardown_test_comm()
 
 def call_method(method, *args, **kwargs):