PHP Pest (with Laravel) tests running very slow in OSX Docker

Question

I was developing an app locally using Laravel. For testing I was using Pest and tests were running fast, really fast. That was until I decided to Dockerize my app, now tests are running pretty slow.

What it used to run in 3 seconds now it's running in over a minute.

Here's my Dockerfile:

FROM php:8.1.12-fpm

ARG uid=1000
ARG user=macgiver

RUN apt-get update && apt-get install -y \
    git \
    curl \
    libpng-dev \
    libonig-dev \
    libxml2-dev \
    zip \
    unzip

# Install and enable xDebug
RUN pecl install xdebug \
    && docker-php-ext-enable xdebug

RUN apt-get clean && rm -rf /var/lib/apt/lists/*

# Install php modules required by laravel.
RUN docker-php-ext-install pdo_mysql mbstring exif pcntl bcmath gd

# Create system user to run Composer and Artisan commands.
RUN useradd -G www-data,root -u $uid -d /home/$user $user
RUN mkdir -p /home/$user/.composer && \
    chown -R $user:$user /home/$user

# Install composer
COPY --from=composer:latest /usr/bin/composer /usr/bin/composer

# Set working directory
WORKDIR /var/www

USER $user

and this is my docker-compose:

version: "3.9"
services:
  app:
    build:
      context: ./
      dockerfile: Dockerfile
    image: dmc
    container_name: dmc-app
    restart: unless-stopped
    working_dir: /var/www/
    depends_on:
      - db
      - nginx
    volumes:
      - ./:/var/www/
      - ./docker/php/conf.d/xdebug.ini:/usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini
      - ./docker/php/conf.d/error_reporting.ini:/usr/local/etc/php/conf.d/error_reporting.ini
    expose:
      - "9003"
    networks:
      - dmc-net

  nginx:
    image: nginx:1.23.2-alpine
    container_name: dmc-nginx
    restart: unless-stopped
    ports:
      - "8000:80"
    volumes:
      - ./:/var/www
      - ./docker-compose/nginx:/etc/nginx/conf.d
    networks:
      - dmc-net

  db:
    image: mysql:8.0.31
    container_name: dmc-db
    restart: unless-stopped
    # using 3307 on the host machine to avoid collisions in case there's a local MySQL instance installed already.
    ports:
      - "3307:3306"
    # use the variables declared in .env file
    environment:
      MYSQL_HOST: ${DB_HOST}
      MYSQL_DATABASE: ${DB_DATABASE}
      MYSQL_PASSWORD: ${DB_PASSWORD}
      MYSQL_ROOT_PASSWORD: abcd1234
      MYSQL_USER: ${DB_USERNAME}
      SERVICE_TAGS: dev
      SERVICE_NAME: mysql
    volumes:
      - ./docker-compose/mysql:/docker-entrypoint-initdb.d
      - mysql-data:/var/lib/mysql
    networks:
      - dmc-net

networks:
  dmc-net:
    driver: bridge

volumes:
  mysql-data:

Any ideas?