.whatsapp-testimonial {
  display: inline-block;
  background-color: #d9fdd3;
  padding: 1rem 1rem 2rem;
  border-radius: 5px;
  position: relative;
}

.whatsapp-testimonial:after {
  content: "18:38 a.m.";
  font-size: 75%;
  color: #667781;
  margin-left: 40px;
  position: absolute;
  right: 0.5rem;
  bottom: 0.5rem;
}

.whatsapp-testimonial:before {
  content: "";
  display: block;
  position: absolute;
  top: 0;
  left: -20px;
  height: 20px;
  width: 20px;
  border-left: 0 solid transparent;
  border-bottom: 1.5rem solid transparent;
  border-right: 1.5rem solid  #d9fdd3;
  border-top: 0 solid transparent;
}