diff --git a/packages/backend-app-api/src/wiring/BackendInitializer.test.ts b/packages/backend-app-api/src/wiring/BackendInitializer.test.ts
index a64743233d..7be989a0ea 100644
--- a/packages/backend-app-api/src/wiring/BackendInitializer.test.ts
+++ b/packages/backend-app-api/src/wiring/BackendInitializer.test.ts
@@ -27,6 +27,7 @@ import {
 import { BackendInitializer } from './BackendInitializer';
 import { mockServices } from '@backstage/backend-test-utils';
 import { BackendStartupError } from './BackendStartupError';
+import { CONFIG_KEY_PART_PATTERN } from '@backstage/config';
 
 const baseFactories = [
   mockServices.rootLifecycle.factory(),
@@ -1025,7 +1026,7 @@ describe('BackendInitializer', () => {
       }),
     );
     await expect(init.start()).rejects.toThrow(
-      "Invalid pluginId 'test:invalid&id', must match the pattern /^[a-z][a-z0-9]*(?:[-_][a-z][a-z0-9]*)*$/i (letters, digits, dashes, and underscores only, starting with a letter)",
+      `Invalid pluginId 'test:invalid&id', must match the pattern ${CONFIG_KEY_PART_PATTERN} (letters, digits, dashes, and underscores only, starting with a letter)`,
     );
   });
 
@@ -1055,7 +1056,7 @@ describe('BackendInitializer', () => {
       }),
     );
     await expect(init.start()).rejects.toThrow(
-      "Invalid moduleId 'invalid:module&id' for plugin 'test', must match the pattern /^[a-z][a-z0-9]*(?:[-_][a-z][a-z0-9]*)*$/i (letters, digits, dashes, and underscores only, starting with a letter)",
+      `Invalid moduleId 'invalid:module&id' for plugin 'test', must match the pattern ${CONFIG_KEY_PART_PATTERN} (letters, digits, dashes, and underscores only, starting with a letter)`,
     );
   });
 
diff --git a/packages/backend-dynamic-feature-service/src/schemas/frontend.ts b/packages/backend-dynamic-feature-service/src/schemas/frontend.ts
index d101487318..bb83898f8c 100644
--- a/packages/backend-dynamic-feature-service/src/schemas/frontend.ts
+++ b/packages/backend-dynamic-feature-service/src/schemas/frontend.ts
@@ -31,7 +31,7 @@ import {
  */
 export const dynamicPluginsFrontendSchemas = createBackendModule({
   pluginId: 'app',
-  moduleId: 'core.dynamicplugins.frontendSchemas',
+  moduleId: 'core-dynamicplugins-frontendSchemas',
   register(reg) {
     reg.registerInit({
       deps: {