diff --git a/src/test/java/walkingkooka/tree/search/SearchNodeTestCase.java b/src/test/java/walkingkooka/tree/search/SearchNodeTestCase.java
index 4d52869..b578c46 100644
--- a/src/test/java/walkingkooka/tree/search/SearchNodeTestCase.java
+++ b/src/test/java/walkingkooka/tree/search/SearchNodeTestCase.java
@@ -216,7 +216,9 @@ public final String isMethodTypeNameSuffix() {
 
     @Override
     public final Predicate<String> isMethodIgnoreMethodFilter() {
-        return (m) -> m.equals("isRoot") || m.equals("isEmpty");
+        return (m) -> m.equals("isRoot") ||
+                m.equals("isEmpty") ||
+                m.equals("isNotEmpty");
     }
 
     // TypeNameTesting..................................................................................................