Index: tests/test_demo.py
===================================================================
diff -u -r322377decd72091859c355c84705276e89cd140e -r131617df8d7f09a74c893701b8e13b09fff6d1d2
--- tests/test_demo.py	(.../test_demo.py)	(revision 322377decd72091859c355c84705276e89cd140e)
+++ tests/test_demo.py	(.../test_demo.py)	(revision 131617df8d7f09a74c893701b8e13b09fff6d1d2)
@@ -18,6 +18,7 @@
 from dialin.dg.dialysate_generator import DG
 from dialin.hd.hemodialysis_device import HD
 from dialin.hd.constants import RESET, NO_RESET, BUTTON_PRESSED, BUTTON_RELEASED
+from dialin.utils.base import find_variables_in_object
 import time
 
 
@@ -114,5 +115,11 @@
         print(dg.valves.get_valve_states())
 
 
+def test_reverse_lookup():
+    hd = HD()
+
+    print(find_variables_in_object(hd.ui, 2, "REQUEST_"))
+
+
 if __name__ == '__main__':
-    test_valves()
+    test_reverse_lookup()