diff --git a/toolbox/fdc3-workbench/src/fixtures/contexts.ts b/toolbox/fdc3-workbench/src/fixtures/contexts.ts
index 46a40dd17..6dc3829ab 100644
--- a/toolbox/fdc3-workbench/src/fixtures/contexts.ts
+++ b/toolbox/fdc3-workbench/src/fixtures/contexts.ts
@@ -92,7 +92,21 @@ export const contexts: ContextItem[] = [
 					streamId: "j75xqXy25NBOdacUI3FNBH"
 				}
 			},
-			message: "A message to send"
+			message: {
+				type: 'fdc3.message',
+				text: {
+				  'text/plain': 'Hey all, can we discuss the issue together? I attached a screenshot'
+				},
+				entities: {
+				   0: {
+					   type: 'fdc3.fileAttachment',
+						data: {
+						name: 'myImage.png',
+							  dataUri: 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIAQMAAAD+wSzIAAAABlBMVEX///+/v7+jQ3Y5AAAADklEQVQI12P4AIX8EAgALgAD/aNpbtEAAAAASUVORK5CYII'
+						}
+					}
+				}
+			  }
 		},
 		schemaUrl: new URL("https://fdc3.finos.org/schemas/next/context/chatMessage.schema.json"),
 	},