diff --git a/.isort.cfg b/.isort.cfg
index 4ac3346..710e734 100644
--- a/.isort.cfg
+++ b/.isort.cfg
@@ -1,2 +1,2 @@
 [settings]
-known_third_party = ioos_pkg_skeleton,setuptools
+known_third_party = ioos_pkg_skeleton,numpy,pytest,setuptools
diff --git a/tests/test_kernels.py b/tests/test_kernels.py
index 2c29a03..be8f09f 100644
--- a/tests/test_kernels.py
+++ b/tests/test_kernels.py
@@ -11,12 +11,7 @@ def numpy_array_2d():
     return data
 
 
-@pytest.mark.parametrize(
-    "kernel_function",
-    [
-        simple_diffusion_kernel
-    ]
-)
+@pytest.mark.parametrize("kernel_function", [simple_diffusion_kernel])
 def test_conservation(numpy_array_2d, kernel_function):
     res = kernel_function(numpy_array_2d)
     np.testing.assert_allclose(res.sum(), 0.0, atol=1e-12)