Make xfail strict

Author: ricardoV94

pyproject.toml

@@ -119,6 +119,7 @@ tag_prefix = "rel-"
 [tool.pytest.ini_options]
 addopts = "--durations=50 --doctest-modules --ignore=pytensor/link --ignore=pytensor/misc/check_duplicate_key.py"
 testpaths = ["pytensor/", "tests/"]
+xfail_strict = true
 
 [tool.ruff]
 line-length = 88

tests/link/jax/test_einsum.py

@@ -24,7 +24,6 @@ def test_jax_einsum():
     compare_jax_and_py(fg, [x, y, z])
 
 
-@pytest.mark.xfail(raises=NotImplementedError)
 def test_ellipsis_einsum():
     subscripts = "...i,...i->..."
     x = np.random.rand(2, 5)

tests/tensor/rewriting/test_elemwise.py

@@ -1056,7 +1056,6 @@ def test_big_fusion(self):
             for node in dlogp.maker.fgraph.toposort()
         )
 
-    @pytest.mark.xfail(reason="Fails due to #1244")
     def test_add_mul_fusion_precedence(self):
         """Test that additions and multiplications are "fused together" before
         a `Composite` `Op` is introduced. This fusion is done by canonicalization