diff --git a/Orange/widgets/classify/tests/test_owknnclassification.py b/Orange/widgets/classify/tests/test_owknnclassification.py
index 8d891efc04d..5caf7d40f21 100644
--- a/Orange/widgets/classify/tests/test_owknnclassification.py
+++ b/Orange/widgets/classify/tests/test_owknnclassification.py
@@ -1,53 +1,30 @@
 # Test methods with long descriptive names can omit docstrings
 # pylint: disable=missing-docstring
-from PyQt4 import QtGui
-
-from Orange.widgets.tests.base import WidgetTest
 from Orange.widgets.classify.owknn import OWKNNLearner
+from Orange.widgets.tests.base import (WidgetTest, WidgetLearnerTestMixin,
+                                       GuiToParam)
 
 
-class TestOwKnnClassification(WidgetTest):
+class TestOWKNN(WidgetTest, WidgetLearnerTestMixin):
     def setUp(self):
-        self.widget = self.create_widget(OWKNNLearner)
-        self.combo_box = self.widget.findChildren(QtGui.QComboBox)
-        self.spinner = self.widget.findChildren(QtGui.QSpinBox)
-
-    def test_boxes_visible(self):
-        """ Check if all boxes visible """
-        self.assertEqual(self.combo_box[0].isHidden(), False)
-        self.assertEqual(self.combo_box[1].isHidden(), False)
-        self.assertEqual(self.spinner[0].isHidden(), False)
-
-    def test_values_on_output(self):
-        """ Check if all values right on output """
-        self.widget.apply()
-        learner = self.widget.learner.params
-        self.assertEqual(learner.get("n_neighbors"), self.spinner[0].value())
-        self.assertEqual(learner.get("metric").capitalize(), self.combo_box[0].currentText())
-        self.assertEqual(learner.get("weights").capitalize(), self.combo_box[1].currentText())
-
-    def test_selected_values_metrics(self):
-        """ Check right value of combobox metric is right on output """
-        for index, metric in enumerate(self.widget.metrics):
-            self.combo_box[0].activated.emit(index)
-            self.combo_box[0].setCurrentIndex(index)
-            self.assertEqual(self.combo_box[0].currentText().capitalize(), metric.capitalize())
-            self.widget.apply()
-            self.assertEqual(self.widget.learner.params.get("metric").capitalize(),
-                             self.combo_box[0].currentText().capitalize())
-
-    def test_selected_values_weights(self):
-        """ Check right value of combobox metric is right on output """
-        for index, metric in enumerate(self.widget.weights):
-            self.combo_box[1].activated.emit(index)
-            self.combo_box[1].setCurrentIndex(index)
-            self.assertEqual(self.combo_box[1].currentText().capitalize(), metric.capitalize())
-            self.widget.apply()
-            self.assertEqual(self.widget.learner.params.get("weights").capitalize(),
-                             self.combo_box[1].currentText().capitalize())
-
-    def test_learner_on_output(self):
-        """ Check if learner is on output after create widget  and apply """
-        self.widget.apply()
-        self.assertNotEqual(self.widget.learner, None)
-
+        self.widget = self.create_widget(OWKNNLearner,
+                                         stored_settings={"auto_apply": False})
+        self.init()
+
+        def combo_set_value(i, x):
+            x.activated.emit(i)
+            x.setCurrentIndex(i)
+
+        metrics = self.widget.metrics
+        weights = self.widget.weights
+        nn_spin = self.widget.n_neighbors_spin
+        nn_min_max = [nn_spin.minimum(), nn_spin.maximum()]
+        self.gui_to_params = [
+            GuiToParam('metric', self.widget.metrics_combo,
+                       lambda x: x.currentText().lower(),
+                       combo_set_value, metrics, list(range(len(metrics)))),
+            GuiToParam('weights', self.widget.weights_combo,
+                       lambda x: x.currentText().lower(),
+                       combo_set_value, weights, list(range(len(weights)))),
+            GuiToParam('n_neighbors', nn_spin, lambda x: x.value(),
+                       lambda i, x: x.setValue(i), nn_min_max, nn_min_max)]