diff --git a/.travis.yml b/.travis.yml
index df927493d36..f5d8b966a87 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,9 +12,7 @@ node_js:
   - 12
   - 10
 
-script:
-  - yarn test
-  - yarn travis:coveralls
+script: yarn test && (yarn travis:coveralls || true)
 
 jobs:
   include:
diff --git a/packages/ajv/src/pipes/AjvValidationPipe.ts b/packages/ajv/src/pipes/AjvValidationPipe.ts
index 17c415cd523..b6b6a34366a 100644
--- a/packages/ajv/src/pipes/AjvValidationPipe.ts
+++ b/packages/ajv/src/pipes/AjvValidationPipe.ts
@@ -1,6 +1,6 @@
 import {ConverterService, getJsonSchema, Inject, IPipe, OverrideProvider, ParamMetadata, ParamTypes, ValidationPipe} from "@tsed/common";
 import {isEmpty} from "@tsed/core";
-import {Ajv} from "../services/Ajv";
+import {AJV} from "../services/Ajv";
 import {AjvErrorFormatterPipe} from "./AjvErrorFormatterPipe";
 
 @OverrideProvider(ValidationPipe)
@@ -11,8 +11,8 @@ export class AjvValidationPipe extends ValidationPipe implements IPipe {
   @Inject()
   formatter: AjvErrorFormatterPipe;
 
-  @Inject()
-  ajv: Ajv;
+  @Inject(AJV)
+  ajv: AJV;
 
   transform(value: any, metadata: ParamMetadata): any {
     const {schema} = metadata.store.get(AjvValidationPipe) || {};
diff --git a/packages/ajv/src/services/Ajv.spec.ts b/packages/ajv/src/services/Ajv.spec.ts
index 0449c6753ef..9548d851a4e 100644
--- a/packages/ajv/src/services/Ajv.spec.ts
+++ b/packages/ajv/src/services/Ajv.spec.ts
@@ -1,13 +1,13 @@
 import {TestContext} from "@tsed/testing";
 import * as AjvKlass from "ajv";
 import {expect} from "chai";
-import {Ajv} from "./Ajv";
+import {AJV} from "./Ajv";
 
 describe("Ajv", () => {
   beforeEach(() => TestContext.create());
   afterEach(() => TestContext.reset());
   it("should create a new Ajv instance", async () => {
-    const ajv = await TestContext.invoke<Ajv>(Ajv);
+    const ajv = await TestContext.invoke<AJV>(AJV);
 
     expect(ajv).to.instanceof(AjvKlass);
     expect(
diff --git a/packages/ajv/src/services/Ajv.ts b/packages/ajv/src/services/Ajv.ts
index e27bf3b498d..f2706c863c4 100644
--- a/packages/ajv/src/services/Ajv.ts
+++ b/packages/ajv/src/services/Ajv.ts
@@ -1,19 +1,19 @@
 import {Configuration, ProviderScope, registerProvider} from "@tsed/di";
-import * as AjvKlass from "ajv";
+import * as Ajv from "ajv";
 import {IAjvSettings} from "../interfaces/IAjvSettings";
 
 // tslint:disable-next-line:variable-name
-export const Ajv: any = AjvKlass;
-export type Ajv = AjvKlass.Ajv;
+export const AJV: any = Symbol.for("AJV");
+export type AJV = Ajv.Ajv;
 
 registerProvider({
-  provide: Ajv,
+  provide: AJV,
   deps: [Configuration],
   scope: ProviderScope.SINGLETON,
   useFactory(configuration: Configuration) {
     const {errorFormat, errorFormatter, options = {}, ...props} = configuration.get<IAjvSettings>("ajv") || {};
 
-    return new AjvKlass({
+    return new Ajv({
       verbose: false,
       ...props,
       ...options