Index: trunk/src/org/openstreetmap/josm/data/validation/tests/MapCSSTagChecker.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/MapCSSTagChecker.java	(revision 17755)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/MapCSSTagChecker.java	(revision 17756)
@@ -26,4 +26,5 @@
 import org.openstreetmap.josm.data.osm.IPrimitive;
 import org.openstreetmap.josm.data.osm.OsmPrimitive;
+import org.openstreetmap.josm.data.preferences.BooleanProperty;
 import org.openstreetmap.josm.data.preferences.CachingProperty;
 import org.openstreetmap.josm.data.preferences.sources.SourceEntry;
@@ -60,7 +61,11 @@
     private final Map<MapCSSRule, MapCSSTagCheckerAndRule> ruleToCheckMap = new HashMap<>();
     private static final Map<IPrimitive, Area> mpAreaCache = new HashMap<>();
-    private static final CachingProperty<Boolean> PREF_OTHER = ValidatorPrefHelper.PREF_OTHER.cached();
     static final boolean ALL_TESTS = true;
     static final boolean ONLY_SELECTED_TESTS = false;
+
+    /**
+     * Cached version of {@link ValidatorPrefHelper#PREF_OTHER}, see #20745.
+     */
+    private static final CachingProperty<Boolean> PREF_OTHER = new BooleanProperty("validator.other", false).cached();
 
     /**