--- a/mobile/android/base/tests/testReaderMode.java
+++ b/mobile/android/base/tests/testReaderMode.java
@@ -16,16 +16,19 @@ import org.json.JSONObject;
  * checks the reader toolbar functionality(share, add/remove to reading list, go to reading list)
  * accessing a page from reading list menu, checks that the reader icon is associated in History tab
  * and that the reading list is properly populated after adding or removing reader items
  */
 public class testReaderMode extends AboutHomeTest {
     static final int EVENT_CLEAR_DELAY_MS = 3000;
     static final int READER_ICON_MAX_WAIT_MS = 15000;
 
+    // IDs for UI views.
+    private static final String PAGE_ACTION_LAYOUT_ID = "page_action_layout";
+
     @Override
     protected int getTestType() {
         return TEST_MOCHITEST;
     }
     public void testReaderMode() {
         blockForGeckoReady();
 
         Actions.EventExpecter contentEventExpecter;
@@ -148,17 +151,17 @@ public class testReaderMode extends Abou
         openAboutHomeTab(AboutHomeTabs.READING_LIST);
         list = findListViewWithTag("reading_list");
         child = list.getChildAt(childNo-1);
         mAsserter.ok(child == null, "Verify if the Reading List is empty", "The Reading List is empty");
     }
 
     // Get the reader icon method
     protected View getReaderIcon() {
-        View pageActionLayout = mSolo.getView(0x7f070025);
+        View pageActionLayout = mSolo.getView(PAGE_ACTION_LAYOUT_ID);
         final ViewGroup actionLayoutEntry = (ViewGroup)pageActionLayout;
         View icon = actionLayoutEntry.getChildAt(1);
         if (icon == null || icon.getVisibility() != View.VISIBLE) {
             // wait for the view to be visible, otherwise it may not respond
             // to clicks -- see bug 927578
             mAsserter.dumpLog("reader icon not visible -- waiting for visibility");
             Condition visibilityCondition = new Condition() {
                 @Override