diff --git a/pkgs/development/python-modules/dask-image/default.nix b/pkgs/development/python-modules/dask-image/default.nix
index a38350f0f6a..38d113eee70 100644
--- a/pkgs/development/python-modules/dask-image/default.nix
+++ b/pkgs/development/python-modules/dask-image/default.nix
@@ -2,12 +2,10 @@
 , buildPythonPackage
 , fetchPypi
 , dask
-, numpy, toolz # dask[array]
 , scipy
 , pims
-, pytest
-, pytest-flake8
 , scikitimage
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
@@ -19,24 +17,17 @@ buildPythonPackage rec {
     sha256 = "0bf7ea8dcd9d795505b498bd632394720c048f50761e23c574d9a6bacfb27cbb";
   };
 
-  nativeBuildInputs = [ pytest-flake8 ];
-  propagatedBuildInputs = [ dask numpy toolz scipy pims ];
+  propagatedBuildInputs = [ dask scipy pims ];
+
+  prePatch = ''
+    substituteInPlace setup.cfg --replace "--flake8" ""
+  '';
+
   checkInputs = [
-    pytest
+    pytestCheckHook
     scikitimage
   ];
 
-  # ignore errors from newer versions of flake8
-  prePatch = ''
-    substituteInPlace setup.cfg \
-      --replace "docs/conf.py,versioneer.py" \
-        "docs/conf.py,versioneer.py,dask_image/ndfilters/_utils.py"
-  '';
-
-  # scikit.external is not exported
-  checkPhase = ''
-    pytest --ignore=tests/test_dask_image/
-  '';
   pythonImportsCheck = [ "dask_image" ];
 
   meta = with lib; {