Jest Testing - mockReset does not clear the already set values

Question

I have a lambda which calls an interface. Am trying to mock the functions imported from the interface. In each test case, I have to mock different values. When I run all the test cases, the first mocked value does not get cleared and it is carried over to all Test cases

interface.js

  const oracledb=require("oracledb");
  module.exports = class dbLayer{
      execSql= async (sqlQuery) => {
      var result;
      var binds={};
      result = await oracledb.execute(sqlQuery,binds);
      return result
    }
  }

lambda.js

const qryInterface = require(./interface)
var db;
const handler = async (event, context) => {
  var sql= event.query
  db = new qryInterface();
  var dbResponse = await db.execSql(sql)
  return dbResponse 
}

test.js

const index = require(./lambda)
const dbMock = require(./interface)
jest.mock(./interface);

var mockResponse1 = {
  rows: [
    {
      col1 : 123
    }
  ]
}
var mockResponse2 = {
  rows: [
    {
      col1 : 456
    }
  ]
}

const firstQryResponse = async () => {
  return new Promise((resolve, reject) => {
    resolve(mockResponse1);
  });
};
const secondQryResponse = async () => {
  return new Promise((resolve, reject) => {
    resolve(mockResponse2);
  });
};

describe("1st test suite", () => {
  beforeEach(() => {
    dbMock.mockReset();
    jest.restoreAllMocks();
  });

  it("Test 1", asycn () => {
    var event={}
    event.sql=`SELECT col1 FROM TBL_A WHERE col2 = 'A'` 

    dbMock.mockImplementation(() => {
      return {
        execSql:firstQryResponse
      }
    });
    var response = await index.handler(event)
    expect(response).toEqual(mockResponse1 )
  });

  it("Test 2", asycn () => {
    var event={}
    event.sql=`SELECT col1 FROM TBL_A WHERE col2 = 'B'` 

    dbMock.mockImplementation(() => {
      return {
        execSql:secondQryResponse
      }
    });
    var response = await index.handler(event)
    expect(response).toEqual(mockResponse2 )
  });

});

Test 1 mocks the value set in firstQryResponse and Test 2 mocks secondQryResponse. But what happens is the value mocked for execSql is Not getting reset in Test 2 .i.e. firstQryResponse gets carried over to Test 2. Because of this, 2nd test fails. If i run them individually, it runs fine. I did try mockReset(), but it does not help as well.

Appreciate any help on this

Thanks Sadiq