diff --git a/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java b/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
index 1c931e10c..4a24146a5 100644
--- a/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
@@ -948,7 +948,7 @@ public abstract class AbstractMultiValuedMapTest<K, V> extends AbstractObjectTes
     @Test
     public void testKeySetSize() {
         final MultiValuedMap<K, V> map = makeFullMap();
-        assertEquals(3, map.keySet().size());
+        assertEquals(getSampleKeySize(), map.keySet().size());
     }
 
     @Test