diff --git a/orion/src/integration-test/java/tech/pegasys/pantheon/orion/OrionTest.java b/orion/src/integration-test/java/tech/pegasys/pantheon/orion/OrionTest.java
index 06074d1e64..9a5ec87137 100644
--- a/orion/src/integration-test/java/tech/pegasys/pantheon/orion/OrionTest.java
+++ b/orion/src/integration-test/java/tech/pegasys/pantheon/orion/OrionTest.java
@@ -32,7 +32,7 @@
 
 public class OrionTest {
 
-  private static String PAYLOAD = "a wonderful transaction";
+  private static final String PAYLOAD = "a wonderful transaction";
   private static Orion orion;
   private static Orion broken;