diff --git a/pkgs/development/python-modules/orange-canvas-core/default.nix b/pkgs/development/python-modules/orange-canvas-core/default.nix
index cbd34fc8f8aa..38de13c23a59 100644
--- a/pkgs/development/python-modules/orange-canvas-core/default.nix
+++ b/pkgs/development/python-modules/orange-canvas-core/default.nix
@@ -26,6 +26,7 @@
 
   # tests
   qt5,
+  pyqt5,
   pytest-qt,
   pytestCheckHook,
 
@@ -77,6 +78,7 @@ buildPythonPackage rec {
   '';
 
   nativeCheckInputs = [
+    pyqt5
     pytest-qt
     pytestCheckHook
   ];
diff --git a/pkgs/development/python-modules/qasync/default.nix b/pkgs/development/python-modules/qasync/default.nix
index 5ef1ad8242de..c1b317c445e2 100644
--- a/pkgs/development/python-modules/qasync/default.nix
+++ b/pkgs/development/python-modules/qasync/default.nix
@@ -2,7 +2,7 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  pyqt5,
+  pyqt6,
   pytestCheckHook,
   uv-build,
 }:
@@ -27,9 +27,10 @@ buildPythonPackage rec {
 
   build-system = [ uv-build ];
 
-  dependencies = [ pyqt5 ];
-
-  nativeCheckInputs = [ pytestCheckHook ];
+  nativeCheckInputs = [
+    pytestCheckHook
+    pyqt6
+  ];
 
   pythonImportsCheck = [ "qasync" ];