diff --git a/e2e-tests/app.e2e-spec.ts b/e2e-tests/app.e2e-spec.ts
deleted file mode 100644
index 50cda62..0000000
--- a/e2e-tests/app.e2e-spec.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { INestApplication } from '@nestjs/common';
-import * as request from 'supertest';
-import { AppModule } from './../src/app.module';
-
-describe('AppController (e2e)', () => {
-  let app: INestApplication;
-
-  beforeEach(async () => {
-    const moduleFixture: TestingModule = await Test.createTestingModule({
-      imports: [AppModule],
-    }).compile();
-
-    app = moduleFixture.createNestApplication();
-    await app.init();
-  });
-
-  it('/ (GET)', () => {
-    return request(app.getHttpServer())
-      .get('/')
-      .expect(200)
-      .expect('Hello World!');
-  });
-});
diff --git a/e2e-tests/jest-e2e.json b/e2e-tests/jest-e2e.json
deleted file mode 100644
index e9d912f..0000000
--- a/e2e-tests/jest-e2e.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "moduleFileExtensions": ["js", "json", "ts"],
-  "rootDir": ".",
-  "testEnvironment": "node",
-  "testRegex": ".e2e-spec.ts$",
-  "transform": {
-    "^.+\\.(t|j)s$": "ts-jest"
-  }
-}
diff --git a/package.json b/package.json
index 126906b..f4d013a 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,6 @@
     "test:watch": "jest --watch",
     "test:cov": "jest --coverage",
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
-    "test:e2e": "jest --config e2e-tests/jest-e2e.json",
     "prepare": "husky install"
   },
   "dependencies": {
@@ -77,7 +76,7 @@
     "collectCoverageFrom": [
       "**/*.(t|j)s"
     ],
-    "coverageDirectory": "../coverage",
+    "coverageDirectory": "<rootDir>/coverage",
     "testEnvironment": "node",
     "moduleNameMapper": {
       "@/(.*)": "<rootDir>/src/$1",
diff --git a/tests/utils/uuidTransformer.spec.ts b/tests/utils/uuidTransformer.spec.ts
index 20e1d7b..f109faa 100644
--- a/tests/utils/uuidTransformer.spec.ts
+++ b/tests/utils/uuidTransformer.spec.ts
@@ -17,11 +17,24 @@ describe('uuidTransformer util', () => {
     expect(transformer.from(null)).toBe(NIL);
   });
 
+  it('From method should throw an error if paring an invalid length buffer', () => {
+    expect(() => transformer.from(Buffer.alloc(15))).toThrow();
+  });
+
   it('From method should return a nil uuid if empty 16 length buffer is passed', () => {
     expect(transformer.from(Buffer.alloc(16))).toBe(NIL);
   });
 
+  it('From and To methods should be each others inverse', () => {
+    const uuid = 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa';
+    expect(transformer.from(transformer.to(uuid))).toBe(uuid);
+  });
+
   it('To method should return a buffer matching the uuid', () => {
     expect(transformer.to(NIL)).toEqual(Buffer.alloc(16));
   });
+
+  it('To method throw an error if passing a string that does not match a uuid', () => {
+    expect(() => transformer.to('test')).toThrow();
+  });
 });