TypeError: _query__WEBPACK_IMPORTED_MODULE_0__.Query is not a constructor

I created a class named Query in query.ts

export class Query { 
   constructor(params?) {...}
}

then i created in the same folder query.spec.ts

import { Query } from './query';

fdescribe('Query Model', () => {
    let query: Query;

    beforeEach(() => {
        query = new Query({});
    });

    it('should be created Query Model', () => {
        expect(query).toBeTruthy();
    });
});

but i keep getting this error

TypeError: _query__WEBPACK_IMPORTED_MODULE_0__.Query is not a constructor

iam working with Angular 12 and karma-jasmine any idea what i am doing wrong?