diff --git a/javaTest/src/test/java/com/ft546/wcs/shadow/history/simulation/CorridorReservationManagerTest.java b/javaTest/src/test/java/com/ft546/wcs/shadow/history/simulation/CorridorReservationManagerTest.java
index fd58587..097c94e 100644
--- a/javaTest/src/test/java/com/ft546/wcs/shadow/history/simulation/CorridorReservationManagerTest.java
+++ b/javaTest/src/test/java/com/ft546/wcs/shadow/history/simulation/CorridorReservationManagerTest.java
@@ -8,6 +8,7 @@ import java.util.Set;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class CorridorReservationManagerTest {
@@ -69,6 +70,8 @@ class CorridorReservationManagerTest {
                 edgesFor(manager, "TASK-1"));
         assertEquals("TASK-1", manager.ownerFor("A", "B"));
         assertEquals("TASK-1", manager.ownerFor("B", "C"));
+        assertNull(manager.ownerFor("A", "D"));
+        assertEquals(3, manager.snapshot().size());
     }
 
     @Test