diff --git a/types/roarr/index.d.ts b/types/roarr/index.d.ts
index fa7bc65b5c..367d939dde 100644
--- a/types/roarr/index.d.ts
+++ b/types/roarr/index.d.ts
@@ -18,7 +18,13 @@ export interface RoarrGlobalStateType extends WriterType {
 
 export type SprintfArgumentType = string | number | boolean | null;
 
-export type MessageContextType = object;
+export interface MessageContextType {
+    application?: string;
+    logLevel?: number;
+    namespace?: string;
+    package?: string;
+    [k: string]: any;
+}
 
 export interface MessageType {
     context: MessageContextType;
diff --git a/types/roarr/roarr-tests.ts b/types/roarr/roarr-tests.ts
index 0e13df4ce9..5068e06900 100644
--- a/types/roarr/roarr-tests.ts
+++ b/types/roarr/roarr-tests.ts
@@ -1,4 +1,4 @@
-import { default as Roarr, MessageType, MessageContextType } from "roarr";
+import { default as Roarr, MessageContextType, MessageType } from "roarr";
 
 const messageContextType = {
     foo: "bar",
@@ -42,7 +42,9 @@ alternativeLog.fatal('foo 2');
 
 const implicitLog = Roarr.child((message) => {
     message;                    // $Expect MessageType
-    message["message"] = message["message"].replace("foo", "bar");
+    message.message = message.message.replace("foo", "bar");
+    message.context["new key"] = "new value";
+    message.context.logLevel = "50"; // $ExpectError
 
     return message;
 });