"pytest": executable file not found in $PATH

[thomasnelissen]

I updated my Python function app from 3.10 to 3.12, I also updated the base image to mcr.microsoft.com/azure-functions/python:4-python3.12

When I run my integration tests I get the following error, which I didn't get when using tag 4-python3.10:
docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: exec: "pytest": executable file not found in $PATH: unknown.

The tests are being triggered from a bash script in AZ DevOps:

docker run \
-e "AZURE_CLIENT_ID=$servicePrincipalId" \
-e "AZURE_TENANT_ID=$tenantId" \
test:test pytest ${{test.path}} -v