Error handling in test not capturing specific error message

      it('should return the error', async () => {
        const mockError = new Error('Failed to load markets')
        const mockLoadMarkets = spyOn(
          exchange,
          'loadMarkets',
        ).mockImplementationOnce(async () => {
          return await Promise.reject(mockError)
        })
        expect(async () => {
          await Fx.runPromise(loadMarketsE(exchange))
        }).toThrowError(mockError)
        mockLoadMarkets.mockRestore()
      })

Expected message: "Failed to load markets"
Received message: "An unknown error occurred"