Index: tst_pre_treatment_water_sample/test.py
===================================================================
diff -u -r0253307c311ba837dde52a0059b734d4015877d9 -r946a9c73f842097ea77985a3c5500fdb52381de0
--- tst_pre_treatment_water_sample/test.py	(.../test.py)	(revision 0253307c311ba837dde52a0059b734d4015877d9)
+++ tst_pre_treatment_water_sample/test.py	(.../test.py)	(revision 946a9c73f842097ea77985a3c5500fdb52381de0)
@@ -63,9 +63,9 @@
     test.endSection()
 
     test.startSection("Verify the water sample screen for verification of BACK Button and NEXT Button")
-    test.compare(str(waitForObjectExists(names.o_back_button).text), config.BACK_BUTTON_TEXT,"Back button text should be {}".format(config.BACK_BUTTON_TEXT))
-    test.compare(waitForObjectExists(names.o_back_button).enabled , True, "Back button should be enabled")
-    mouseClick(waitForObject(names.o_back_button))
+    test.compare(str(waitForObjectExists(names.o_water_sample_back_button).text), config.BACK_BUTTON_TEXT,"Back button text should be {}".format(config.BACK_BUTTON_TEXT))
+    test.compare(waitForObjectExists(names.o_water_sample_back_button).enabled , True, "Back button should be enabled")
+    mouseClick(waitForObject(names.o_water_sample_back_button))
     test.compare(str(waitForObjectExists(names.o_next_button).text), config.NEXT_BUTTON_TEXT, "Next Button text should be {}".format(config.NEXT_BUTTON_TEXT))
     test.compare(waitForObjectExists(names.o_next_button).enabled , True,"Next button should be enabled")
     mouseClick(waitForObject(names.o_next_button))