Index: trunk/test/unit/org/openstreetmap/josm/gui/preferences/imagery/ImageryPreferenceTestIT.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/preferences/imagery/ImageryPreferenceTestIT.java	(revision 14615)
+++ trunk/test/unit/org/openstreetmap/josm/gui/preferences/imagery/ImageryPreferenceTestIT.java	(revision 14616)
@@ -12,4 +12,5 @@
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
@@ -24,4 +25,5 @@
 
 import org.apache.commons.jcs.access.CacheAccess;
+import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.ClassRule;
@@ -106,4 +108,5 @@
     private static TMSCachedTileLoaderJob helper;
     private static List<String> errorsToIgnore;
+    private static List<String> notIgnoredErrors;
 
     /**
@@ -115,4 +118,15 @@
         helper = new TMSCachedTileLoaderJob(null, null, new CacheAccess<>(null), new TileJobOptions(0, 0, null, 0), null);
         errorsToIgnore = TestUtils.getIgnoredErrorMessages(ImageryPreferenceTestIT.class);
+        notIgnoredErrors = new LinkedList<>(errorsToIgnore);
+    }
+
+    /**
+     * Cleanup test
+     */
+    @AfterClass
+    public static void afterClass() {
+        for (String e : notIgnoredErrors) {
+            Logging.warn("Ignore line unused: " + e);
+        }
     }
 
@@ -141,4 +155,6 @@
     private boolean addError(ImageryInfo info, String error) {
         String errorMsg = error.replace('\n', ' ');
+        if (notIgnoredErrors.contains(errorMsg))
+            notIgnoredErrors.remove(errorMsg);
         return addError(errorsToIgnore.contains(errorMsg) ? ignoredErrors : errors, info, errorMsg);
     }