diff --git a/ome-xml/src/main/java/ome/specification/XMLMockObjects.java b/ome-xml/src/main/java/ome/specification/XMLMockObjects.java
index 056b2d401..9751956c1 100644
--- a/ome-xml/src/main/java/ome/specification/XMLMockObjects.java
+++ b/ome-xml/src/main/java/ome/specification/XMLMockObjects.java
@@ -1093,7 +1093,7 @@ public Plane createPlane(int z, int c, int t)
     plane.setTheZ(new NonNegativeInteger(z));
     plane.setTheC(new NonNegativeInteger(c));
     plane.setTheT(new NonNegativeInteger(z));
-    plane.setHashSHA1("1234567890ABCDEF1234567890ABCDEF12345678");
+    plane.setHashSHA1("1234567890ABCDEF1234");
     return plane;
   }