diff --git a/lib/sinon/default-behaviors.js b/lib/sinon/default-behaviors.js
index b4530b67b..6e51ceb89 100644
--- a/lib/sinon/default-behaviors.js
+++ b/lib/sinon/default-behaviors.js
@@ -16,7 +16,7 @@ function throwsException(fake, error, message) {
     } else if (typeof error === "string") {
         fake.exceptionCreator = function () {
             const newException = new Error(
-                message || `Sinon-provided ${error}`,
+                message || `Sinon-provided Error:${error}`,
             );
             newException.name = error;
             return newException;