diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 18a5b085..6760c61f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -24,7 +24,7 @@ repos:
         pass_filenames: false
         args: [--config=./pyproject.toml, .]
 -   repo: https://github.com/PyCQA/flake8
-    rev: '6.0.0'
+    rev: '6.1.0'
     hooks:
         # Run flake8.
     -   id: flake8
diff --git a/esmf_regrid/tests/unit/schemes/test__regrid_unstructured_to_rectilinear__prepare.py b/esmf_regrid/tests/unit/schemes/test__regrid_unstructured_to_rectilinear__prepare.py
index 0e585b0d..a14fcfa1 100644
--- a/esmf_regrid/tests/unit/schemes/test__regrid_unstructured_to_rectilinear__prepare.py
+++ b/esmf_regrid/tests/unit/schemes/test__regrid_unstructured_to_rectilinear__prepare.py
@@ -68,5 +68,5 @@ def test_flat_cubes():
     assert mesh_dim == 0
     assert grid_x == tgt.coord("longitude")
     assert grid_y == tgt.coord("latitude")
-    assert type(regridder.tgt) == GridInfo
-    assert type(regridder.src) == MeshInfo
+    assert type(regridder.tgt) is GridInfo
+    assert type(regridder.src) is MeshInfo