Expected Behaviour

Running tests with Redis, we want to run the DB in-memory to save time and resources.

Using withCommand does not apply the commands correctly

const redis = await new RedisContainer("redis:7")
    .withCommand(["redis-server", "--save", "0", "--appendonly", "no"])
    .start()

Actual Behaviour

The container always runs with the default arguments:

Testcontainer Logs
...

Steps to Reproduce
Create a test container with arguments:

const redis = await new RedisContainer("redis:7")
    .withCommand(["redis-server", "--save", "0", "--appendonly", "no"])
    .start()

Log the actual arguments in the redis-container file

Environment Information

• Operating System: Pop_OS 22.04
• Docker Version: 28.4.0
• Node version: 22.18.0
• Testcontainers version: 11.5.1