Fix min scipy

xarray/tests/__init__.py

@@ -87,6 +87,7 @@ def _importorskip(
 
 has_matplotlib, requires_matplotlib = _importorskip("matplotlib")
 has_scipy, requires_scipy = _importorskip("scipy")
+has_scipy_ge_1_13, requires_scipy_ge_1_13 = _importorskip("scipy", "1.13")
 with warnings.catch_warnings():
     warnings.filterwarnings(
         "ignore",

xarray/tests/test_interp.py

@@ -16,6 +16,7 @@
     assert_identical,
     has_dask,
     has_scipy,
+    has_scipy_ge_1_13,
     requires_cftime,
     requires_dask,
     requires_scipy,
@@ -137,18 +138,23 @@ def func(obj, new_x):
     (
         (False, "linear"),
         (False, "akima"),
-        (False, "makima"),
-        (True, "linear"),
+        pytest.param(
+            False,
+            "makima",
+            marks=pytest.mark.skipif(not has_scipy_ge_1_13, reason="scipy too old"),
+        ),
+        pytest.param(
+            True,
+            "linear",
+            marks=pytest.mark.skipif(not has_dask, reason="dask not available"),
+        ),
         (True, "akima"),
     ),
 )
 def test_interpolate_vectorize(use_dask: bool, method: str) -> None:
     if not has_scipy:
         pytest.skip("scipy is not installed.")
 
-    if not has_dask and use_dask:
-        pytest.skip("dask is not installed in the environment.")
-
     # scipy interpolation for the reference
     def func(obj, dim, new_x, method):
         scipy_kwargs = {}