diff --git a/src/main/java/uk/ac/rhul/cs/javatester/SubmissionWrapper.java b/src/main/java/uk/ac/rhul/cs/javatester/SubmissionWrapper.java
index 6420a40152c98fd442be2fcb1b18ec524c31aaf8..272c3246d7ab9231d2a4c53c6e637f3d30e04e98 100644
--- a/src/main/java/uk/ac/rhul/cs/javatester/SubmissionWrapper.java
+++ b/src/main/java/uk/ac/rhul/cs/javatester/SubmissionWrapper.java
@@ -557,11 +557,18 @@ public class SubmissionWrapper implements AutoCloseable {
      */
     public static String[] expectedOutput(String output) {
         return new String[] {
-            "> " + output,
-            "Expected the last line of output shown above to be '" + output + "'."
+            "> " + output, expectedFailMsg(output)
         };
     }
 
+    /**
+     * Construct a default fail message for a given missed output
+     */
+    public static String expectedFailMsg(String output) {
+        return "Expected the last line of output shown above to be '"
+            + output + "'.";
+    }
+
     /**
      * Construct a default interaction with fail response for an output
      */