diff --git a/src/main/java/uk/ac/rhul/cs/javatester/CodeTester.java b/src/main/java/uk/ac/rhul/cs/javatester/CodeTester.java
index a0bfdc763c1263ea08481a5600313825bc568c04..101216a50ab2c293f20166701d658492ea0f679b 100644
--- a/src/main/java/uk/ac/rhul/cs/javatester/CodeTester.java
+++ b/src/main/java/uk/ac/rhul/cs/javatester/CodeTester.java
@@ -1167,7 +1167,9 @@ public class CodeTester {
             if (!isAssignable(method.getReturnType(), returnType)) {
                 throw new BaseTester.FailedTestException(
                     expandMsg(invocationMsg) + "\n\n" +
-                    "Expected the method to have a return type compatible with " +
+                    "Expected " +
+                    method.getName() +
+                    " to have a return type compatible with " +
                     getClassString(returnType) +
                     "."
                 );