diff --git a/packages/rest/src/coercion/coerce-parameter.ts b/packages/rest/src/coercion/coerce-parameter.ts
index 9d3819549f49..b4cff64410e5 100644
--- a/packages/rest/src/coercion/coerce-parameter.ts
+++ b/packages/rest/src/coercion/coerce-parameter.ts
@@ -6,7 +6,7 @@
 import {ParameterObject, isReferenceObject} from '@loopback/openapi-v3-types';
 import {Validator} from './validator';
 import * as debugModule from 'debug';
-import {HttpErrorMessage} from '../';
+import {RestHttpError} from '../';
 
 const debug = debugModule('loopback:rest:coercion');
 
@@ -43,9 +43,8 @@ export function coerceParameter(data: string, spec: ParameterObject) {
     case 'number':
       const coercedData = data ? Number(data) : undefined;
       if (coercedData === undefined) return;
-      if (isNaN(coercedData))
-        throw HttpErrorMessage.invalidData(data, spec.name);
-      return coercedData;  
+      if (isNaN(coercedData)) throw RestHttpError.invalidData(data, spec.name);
+      return coercedData;
     case 'long':
       return Number(data);
     case 'integer':
diff --git a/packages/rest/src/coercion/http-error-message.ts b/packages/rest/src/coercion/rest-http-error.ts
similarity index 91%
rename from packages/rest/src/coercion/http-error-message.ts
rename to packages/rest/src/coercion/rest-http-error.ts
index a1d1c43fa7d0..211f67f0f8fb 100644
--- a/packages/rest/src/coercion/http-error-message.ts
+++ b/packages/rest/src/coercion/rest-http-error.ts
@@ -1,5 +1,5 @@
 import * as HttpErrors from 'http-errors';
-export namespace HttpErrorMessage {
+export namespace RestHttpError {
   export function invalidData<T>(data: T, name: string) {
     const msg = `Invalid data ${JSON.stringify(data)} for parameter ${name}!`;
     return new HttpErrors.BadRequest(msg);
diff --git a/packages/rest/src/coercion/validator.ts b/packages/rest/src/coercion/validator.ts
index fe092143e982..85c62d57f5e5 100644
--- a/packages/rest/src/coercion/validator.ts
+++ b/packages/rest/src/coercion/validator.ts
@@ -4,7 +4,7 @@
 // License text available at https://opensource.org/licenses/MIT
 
 import {ParameterObject} from '@loopback/openapi-v3-types';
-import {HttpErrorMessage} from '../';
+import {RestHttpError} from '../';
 
 /**
  * A set of options to pass into the validator functions
@@ -42,7 +42,7 @@ export class Validator {
     if (this.isAbsent(value)) {
       if (this.isRequired(opts)) {
         const name = this.ctx.parameterSpec.name;
-        throw HttpErrorMessage.missingRequired(name);
+        throw RestHttpError.missingRequired(name);
       } else {
         return;
       }
diff --git a/packages/rest/src/index.ts b/packages/rest/src/index.ts
index 16a775c8cb62..7137560ed2d6 100644
--- a/packages/rest/src/index.ts
+++ b/packages/rest/src/index.ts
@@ -39,4 +39,4 @@ export * from './rest.component';
 export * from './rest.server';
 export * from './sequence';
 export * from '@loopback/openapi-v3';
-export * from './coercion/http-error-message';
+export * from './coercion/rest-http-error';
diff --git a/packages/rest/test/unit/coercion/paramStringToNumber.unit.ts b/packages/rest/test/unit/coercion/paramStringToNumber.unit.ts
index ddc52ac9c77b..8262cd5afef4 100644
--- a/packages/rest/test/unit/coercion/paramStringToNumber.unit.ts
+++ b/packages/rest/test/unit/coercion/paramStringToNumber.unit.ts
@@ -6,7 +6,7 @@
 import {test} from './utils';
 import {ParameterLocation} from '@loopback/openapi-v3-types';
 import * as HttpErrors from 'http-errors';
-import {HttpErrorMessage} from './../../../';
+import {RestHttpError} from './../../../';
 
 const NUMBER_PARAM = {
   in: <ParameterLocation>'path',
@@ -48,10 +48,10 @@ describe('coerce param from string to number - required', () => {
 
   context('empty values trigger ERROR_BAD_REQUEST', () => {
     // null, '' sent from request are converted to raw value ''
-    test<HttpErrors.HttpError>(
+    test(
       REQUIRED_NUMBER_PARAM,
       '',
-      HttpErrorMessage.missingRequired(REQUIRED_NUMBER_PARAM.name),
+      RestHttpError.missingRequired(REQUIRED_NUMBER_PARAM.name),
     );
   });
 });
@@ -85,13 +85,13 @@ describe('coerce param from string to number - optional', () => {
     test(
       NUMBER_PARAM,
       'text',
-      HttpErrorMessage.invalidData('text', NUMBER_PARAM.name),
+      RestHttpError.invalidData('text', NUMBER_PARAM.name),
     );
     // {a: true}, [1,2] are converted to object
     test(
       NUMBER_PARAM,
       {a: true},
-      HttpErrorMessage.invalidData({a: true}, NUMBER_PARAM.name),
+      RestHttpError.invalidData({a: true}, NUMBER_PARAM.name),
     );
   });
 });