diff --git a/packages/core/src/errors.ts b/packages/core/src/errors.ts
index 31a43acf7ea4..2ccbd00a93a0 100644
--- a/packages/core/src/errors.ts
+++ b/packages/core/src/errors.ts
@@ -158,7 +158,7 @@ export function formatRuntimeError<T extends number = RuntimeErrorCode>(
 
   let errorMessage = `${fullCode}${message ? ': ' + message : ''}`;
 
-  if (code < 0) {
+  if (ngDevMode && code < 0) {
     const addPeriodSeparator = !errorMessage.match(/[.,;!?\n]$/);
     const separator = addPeriodSeparator ? '.' : '';
     errorMessage =
diff --git a/packages/core/test/bundling/defer/bundle.golden_symbols.json b/packages/core/test/bundling/defer/bundle.golden_symbols.json
index 76c8f999e51a..ff48d9216b9d 100644
--- a/packages/core/test/bundling/defer/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/defer/bundle.golden_symbols.json
@@ -161,9 +161,6 @@
   {
     "name": "ENVIRONMENT_INITIALIZER"
   },
-  {
-    "name": "ERROR_DETAILS_PAGE_BASE_URL"
-  },
   {
     "name": "ERROR_ORIGINAL_ERROR"
   },