diff --git a/test/src/test/java/hudson/model/ProjectTest.java b/test/src/test/java/hudson/model/ProjectTest.java
index d2e802883b..b60d8748bc 100644
--- a/test/src/test/java/hudson/model/ProjectTest.java
+++ b/test/src/test/java/hudson/model/ProjectTest.java
@@ -526,8 +526,8 @@ public class ProjectTest {
 
         Map<Integer,Fingerprint.RangeSet> relationship = upstream.getRelationship(downstream);
         assertFalse("Project upstream should have relationship with downstream", relationship.isEmpty());
-        assertTrue("Relationship should contain upstream #3", relationship.keySet().contains(3));
-        assertFalse("Relationship should not contain upstream #4 because previous fingerprinted file was not changed since #3", relationship.keySet().contains(4));
+        assertTrue("Relationship should contain upstream #3", relationship.containsKey(3));
+        assertFalse("Relationship should not contain upstream #4 because previous fingerprinted file was not changed since #3", relationship.containsKey(4));
         assertEquals("downstream #2 should be the first build which depends on upstream #3", 2, relationship.get(3).min());
         assertEquals("downstream #3 should be the last build which depends on upstream #3", 3, relationship.get(3).max()-1);
         assertEquals("downstream #4 should depend only on upstream #5", 4, relationship.get(5).min());