Mark new capture tests as new-opmath-only (#5776)

Author: astralcai

tests/capture/test_operators.py

@@ -54,6 +54,7 @@ def test_abstract_operator():
     # arithmetic dunders integration tested
 
 
+@pytest.mark.usefixtures("new_opmath_only")
 def test_operators_constructed_when_plxpr_enabled():
     """Test that normal operators can still be constructed when plxpr is enabled."""
 
@@ -363,6 +364,7 @@ def qfunc():
 
         assert isinstance(eqn.outvars[0].aval, AbstractOperator)
 
+    @pytest.mark.usefixtures("new_opmath_only")
     def test_mul(self):
         """Test that the scalar multiplication dunder works."""