diff --git a/pixi.lock b/pixi.lock
index ab1106b1..5410ccd1 100644
--- a/pixi.lock
+++ b/pixi.lock
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@@ -4769,7 +4769,7 @@ environments:
       - conda: https://prefix.dev/conda-forge/noarch/python_abi-3.11-8_cp311.conda
       - conda: https://prefix.dev/conda-forge/noarch/setuptools-81.0.0-pyh332efcf_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sortedcontainers-2.4.0-pyhd8ed1ab_1.conda
-      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.18.0-pyhcf101f3_0.conda
+      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.19.0-pyhc364b38_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sympy-1.14.0-pyh04b8f61_6.conda
       - conda: https://prefix.dev/conda-forge/noarch/tomli-2.4.1-pyhcf101f3_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/toolz-1.1.0-pyhd8ed1ab_1.conda
@@ -4821,7 +4821,7 @@ environments:
       - conda: https://prefix.dev/conda-forge/win-64/vcomp14-14.51.36231-h1b9f54f_39.conda
       - conda: https://prefix.dev/conda-forge/win-64/yaml-0.2.5-h6a83c73_3.conda
       - conda: https://prefix.dev/conda-forge/win-64/zstd-1.5.7-h534d264_6.conda
-      - conda_source: array-api-extra[94fff850] @ .
+      - conda_source: array-api-extra[64f7151e] @ .
   tests-cuda:
     channels:
     - url: https://prefix.dev/conda-forge/
@@ -4971,7 +4971,7 @@ environments:
       - conda: https://prefix.dev/conda-forge/noarch/python_abi-3.14-8_cp314.conda
       - conda: https://prefix.dev/conda-forge/noarch/setuptools-81.0.0-pyh332efcf_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sortedcontainers-2.4.0-pyhd8ed1ab_1.conda
-      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.18.0-pyhcf101f3_0.conda
+      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.19.0-pyhc364b38_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sympy-1.14.0-pyh2585a3b_106.conda
       - conda: https://prefix.dev/conda-forge/noarch/tomli-2.4.1-pyhcf101f3_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/toolz-1.1.0-pyhd8ed1ab_1.conda
@@ -5020,7 +5020,7 @@ environments:
       - conda: https://prefix.dev/conda-forge/noarch/python_abi-3.14-8_cp314.conda
       - conda: https://prefix.dev/conda-forge/noarch/setuptools-81.0.0-pyh332efcf_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sortedcontainers-2.4.0-pyhd8ed1ab_1.conda
-      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.18.0-pyhcf101f3_0.conda
+      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.19.0-pyhc364b38_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sympy-1.14.0-pyh04b8f61_6.conda
       - conda: https://prefix.dev/conda-forge/noarch/tomli-2.4.1-pyhcf101f3_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/toolz-1.1.0-pyhd8ed1ab_1.conda
@@ -5238,7 +5238,7 @@ environments:
       - conda: https://prefix.dev/conda-forge/noarch/python_abi-3.11-8_cp311.conda
       - conda: https://prefix.dev/conda-forge/noarch/setuptools-81.0.0-pyh332efcf_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sortedcontainers-2.4.0-pyhd8ed1ab_1.conda
-      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.18.0-pyhcf101f3_0.conda
+      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.19.0-pyhc364b38_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sympy-1.14.0-pyh2585a3b_106.conda
       - conda: https://prefix.dev/conda-forge/noarch/tomli-2.4.1-pyhcf101f3_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/toolz-1.1.0-pyhd8ed1ab_1.conda
@@ -5246,7 +5246,7 @@ environments:
       - conda: https://prefix.dev/conda-forge/noarch/typing_extensions-4.15.0-pyhcf101f3_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/tzdata-2025c-hc9c84f9_1.conda
       - conda: https://prefix.dev/conda-forge/noarch/zipp-4.1.0-pyhcf101f3_0.conda
-      - conda_source: array-api-extra[0d36b293] @ .
+      - conda_source: array-api-extra[08d18e4a] @ .
       p2:
       - conda: https://prefix.dev/conda-forge/noarch/array-api-compat-1.15.0-pyhc364b38_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/array-api-strict-2.5-pyhcf101f3_0.conda
@@ -5287,7 +5287,7 @@ environments:
       - conda: https://prefix.dev/conda-forge/noarch/python_abi-3.11-8_cp311.conda
       - conda: https://prefix.dev/conda-forge/noarch/setuptools-81.0.0-pyh332efcf_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sortedcontainers-2.4.0-pyhd8ed1ab_1.conda
-      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.18.0-pyhcf101f3_0.conda
+      - conda: https://prefix.dev/conda-forge/noarch/sparse-0.19.0-pyhc364b38_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/sympy-1.14.0-pyh04b8f61_6.conda
       - conda: https://prefix.dev/conda-forge/noarch/tomli-2.4.1-pyhcf101f3_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/toolz-1.1.0-pyhd8ed1ab_1.conda
@@ -5353,7 +5353,7 @@ environments:
       - conda: https://prefix.dev/conda-forge/win-64/vcomp14-14.51.36231-h1b9f54f_39.conda
       - conda: https://prefix.dev/conda-forge/win-64/yaml-0.2.5-h6a83c73_3.conda
       - conda: https://prefix.dev/conda-forge/win-64/zstd-1.5.7-h534d264_6.conda
-      - conda_source: array-api-extra[94fff850] @ .
+      - conda_source: array-api-extra[64f7151e] @ .
   tests-nogil:
     channels:
     - url: https://prefix.dev/conda-forge/
@@ -11272,9 +11272,9 @@ packages:
   run_exports: {}
   size: 38802
   timestamp: 1779635534390
-- conda: https://prefix.dev/conda-forge/noarch/sparse-0.18.0-pyhcf101f3_0.conda
-  sha256: b18229272e7b662f8b3e1be4d768753e7b6e6fdf36c5a82878aeec759c6bfaf5
-  md5: c67d2c8ce612c88ece7221fe0b5357f2
+- conda: https://prefix.dev/conda-forge/noarch/sparse-0.19.0-pyhc364b38_0.conda
+  sha256: 32fbfa88c4ce9f00f7cb274e3a9defb44b521899bb9238113411a8cc7bac3d22
+  md5: 2be361cf98960e628815b445ea9631e7
   depends:
   - python >=3.11
   - numpy >=1.17
@@ -11283,8 +11283,8 @@ packages:
   license: BSD-3-Clause
   license_family: BSD
   run_exports: {}
-  size: 124963
-  timestamp: 1771482567549
+  size: 127433
+  timestamp: 1782985176301
 - conda: https://prefix.dev/conda-forge/noarch/sphinx-9.0.4-pyhd8ed1ab_0.conda
   sha256: cf759498d1bf78b69391a4d09b2f0dc425c106adc53aa92387adf4a2f0e6ab16
   md5: 950eae33376107d143a529d48c363832
diff --git a/pixi.toml b/pixi.toml
index c70a0682..fc47ea1b 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -177,7 +177,7 @@ numpy = "=1.24.1"
 [feature.backends.dependencies]
 pytorch = ">=2.12.0"
 dask-core = ">=2026.6.0" # No distributed, tornado, etc.
-sparse = ">=0.18.0"
+sparse = ">=0.19.0"
 
 [feature.backends.target.unix.dependencies]
 jax = ">=0.10.2"
diff --git a/tests/test_funcs.py b/tests/test_funcs.py
index c4e05683..dae7f172 100644
--- a/tests/test_funcs.py
+++ b/tests/test_funcs.py
@@ -1458,7 +1458,6 @@ def test_all_equal(self, xp: ModuleType):
         assert_equal(nunique(a), xp.asarray(1))
 
     @pytest.mark.xfail_xp_backend(Backend.DASK, reason="No equal_nan kwarg in unique")
-    @pytest.mark.xfail_xp_backend(Backend.SPARSE, reason="sparse#855")
     def test_nan(self, xp: ModuleType, library: Backend):
         if library.like(Backend.NUMPY) and NUMPY_VERSION < (1, 24):
             pytest.xfail("NumPy <1.24 has no equal_nan kwarg in unique")