diff --git a/packages/frontend-app-api/src/wiring/createApp.test.tsx b/packages/frontend-app-api/src/wiring/createApp.test.tsx
index dcbd996f15..e649931403 100644
--- a/packages/frontend-app-api/src/wiring/createApp.test.tsx
+++ b/packages/frontend-app-api/src/wiring/createApp.test.tsx
@@ -47,7 +47,7 @@ describe('createInstances', () => {
       }),
     ];
     expect(() => createInstances({ config, plugins })).toThrow(
-      'A "root" extension was detected on the config file and root extensions are not configurable',
+      "A 'root' extension configuration was detected, but the root extension is not configurable",
     );
   });
 
diff --git a/packages/frontend-app-api/src/wiring/parameters.ts b/packages/frontend-app-api/src/wiring/parameters.ts
index 1f4fda12e9..0711f90665 100644
--- a/packages/frontend-app-api/src/wiring/parameters.ts
+++ b/packages/frontend-app-api/src/wiring/parameters.ts
@@ -237,7 +237,7 @@ export function mergeExtensionParameters(options: {
     // Prevent root parametrization
     if (extensionId === 'root') {
       throw new Error(
-        'A "root" extension was detected on the config file and root extensions are not configurable',
+        "A 'root' extension configuration was detected, but the root extension is not configurable",
       );
     }