diff --git a/Orange/widgets/data/owfeaturestatistics.py b/Orange/widgets/data/owfeaturestatistics.py
index 45ef0e55588..bc79cbde168 100644
--- a/Orange/widgets/data/owfeaturestatistics.py
+++ b/Orange/widgets/data/owfeaturestatistics.py
@@ -900,9 +900,9 @@ def set_info(self):
             self.info_meta.setText('')
 
     def on_select(self):
-        self.selected_rows = self.model.mapToSourceRows([
+        self.selected_rows = list(self.model.mapToSourceRows([
             i.row() for i in self.table_view.selectionModel().selectedRows()
-        ])
+        ]))
         self.commit()
 
     def commit(self):
diff --git a/Orange/widgets/data/tests/test_owfeaturestatistics.py b/Orange/widgets/data/tests/test_owfeaturestatistics.py
index f737f6fd946..c141f9c4b77 100644
--- a/Orange/widgets/data/tests/test_owfeaturestatistics.py
+++ b/Orange/widgets/data/tests/test_owfeaturestatistics.py
@@ -1,4 +1,5 @@
 import datetime
+import unittest
 from collections import namedtuple
 from functools import partial
 from itertools import chain
@@ -461,3 +462,7 @@ def test_restores_previous_selection(self):
         # Sending back the old data restores the selection
         self.send_signal(self.widget.Inputs.data, self.data1)
         self.assertEqual(len(self.widget.selected_rows), 2)
+
+
+if __name__ == "__main__":
+    unittest.main()