diff --git a/Orange/widgets/unsupervised/owkmeans.py b/Orange/widgets/unsupervised/owkmeans.py
index 11cc4a9f90d..f6f38f3bf9a 100644
--- a/Orange/widgets/unsupervised/owkmeans.py
+++ b/Orange/widgets/unsupervised/owkmeans.py
@@ -322,7 +322,7 @@ def __commit_finished(self):
         assert self.data is not None
 
         self.__task = None
-        self.setBlocking(False)
+        self.setInvalidated(False)
         self.progressBarFinished()
 
         if self.optimize_k:
@@ -355,7 +355,7 @@ def __launch_tasks(self, ks):
 
         self.__task = Task(futures, watcher)
         self.progressBarInit()
-        self.setBlocking(True)
+        self.setInvalidated(True)
 
     def cancel(self):
         if self.__task is not None:
@@ -368,7 +368,7 @@ def cancel(self):
             task.watcher.doneAll.disconnect(self.__commit_finished)
 
             self.progressBarFinished()
-            self.setBlocking(False)
+            self.setInvalidated(False)
 
     def run_optimization(self):
         if not self.enough_data_instances(self.k_from):
diff --git a/Orange/widgets/unsupervised/tests/test_owkmeans.py b/Orange/widgets/unsupervised/tests/test_owkmeans.py
index 5c3fa3af4fd..cf3fffafe6c 100644
--- a/Orange/widgets/unsupervised/tests/test_owkmeans.py
+++ b/Orange/widgets/unsupervised/tests/test_owkmeans.py
@@ -73,7 +73,7 @@ def test_optimization_report_display(self):
         self.assertFalse(self.widget.mainArea.isHidden())
         self.widget.apply_button.button.click()
 
-        self.wait_until_stop_blocking()
+        self.wait_until_finished()
         self.assertEqual(self.widget.table_view.model().rowCount() > 0, True)
 
     def test_changing_k_changes_radio(self):
@@ -284,13 +284,13 @@ def test_optimization_fails(self):
 
         self.KMeansFail.fail_on = set(range(3, 9))
         widget.invalidate()
-        self.wait_until_stop_blocking()
+        self.wait_until_finished()
         self.assertTrue(widget.Error.failed.is_shown())
         self.assertIsNone(self.get_output(self.widget.Outputs.annotated_data))
 
         self.KMeansFail.fail_on = set()
         widget.invalidate()
-        self.wait_until_stop_blocking()
+        self.wait_until_finished()
         self.assertFalse(widget.Error.failed.is_shown())
         self.assertEqual(widget.selected_row(), 0)
         self.assertIsNotNone(self.get_output(self.widget.Outputs.annotated_data))
@@ -307,7 +307,7 @@ def test_run_fails(self):
 
         self.KMeansFail.fail_on = set()
         self.widget.invalidate()
-        self.wait_until_stop_blocking()
+        self.wait_until_finished()
         self.assertFalse(self.widget.Error.failed.is_shown())
         self.assertIsNotNone(self.get_output(self.widget.Outputs.annotated_data))
 
@@ -429,7 +429,7 @@ def test_invalidate_clusterings_cancels_jobs(self):
         # Now, invalidate by changing max_iter
         widget.max_iterations = widget.max_iterations + 1
         widget.invalidate()
-        self.wait_until_stop_blocking()
+        self.wait_until_finished()
 
         self.assertEqual(widget.clusterings, {})
 
@@ -513,7 +513,7 @@ def test_saved_selection(self):
         self.widget.send_data = Mock()
         self.widget.optimize_k = True
         self.send_signal(self.widget.Inputs.data, self.data)
-        self.wait_until_stop_blocking()
+        self.wait_until_finished()
         self.widget.table_view.selectRow(2)
         self.assertEqual(self.widget.selected_row(), 2)
         self.assertEqual(self.widget.send_data.call_count, 3)
@@ -522,7 +522,7 @@ def test_saved_selection(self):
         w = self.create_widget(OWKMeans, stored_settings=settings)
         w.send_data = Mock()
         self.send_signal(w.Inputs.data, self.data, widget=w)
-        self.wait_until_stop_blocking(widget=w)
+        self.wait_until_finished(widget=w)
         self.assertEqual(w.send_data.call_count, 2)
         self.assertEqual(self.widget.selected_row(), w.selected_row())