diff --git a/pkgs/development/python-modules/pykdtree/default.nix b/pkgs/development/python-modules/pykdtree/default.nix
index c930c70af7c9..b81bba27f1a4 100644
--- a/pkgs/development/python-modules/pykdtree/default.nix
+++ b/pkgs/development/python-modules/pykdtree/default.nix
@@ -40,7 +40,8 @@ buildPythonPackage rec {
 
   preCheck = ''
     # make sure we don't import pykdtree from the source tree
-    mv pykdtree tests
+    mv pykdtree/test_tree.py .
+    rm -rf pykdtree
   '';
 
   nativeCheckInputs = [