Since version 4.5.0 of node-http-handler we are getting this error during test runs:
AWS SDK error wrapper for TypeError
[ERR_VM_DYNAMIC_IMPORT_CALLBACK_MISSING_FLAG]: A dynamic import callback was invoked without --experimental-vm-modules
I believe this change is the cause:
#1921
The flag --experimental-vm-modules should only be required in Jest because it uses the vm module to isolate tests. If Jest isn't supported by smithy-typescript this isn't really a bug, but ideally something in the documentation (and changelog?) around this would help other developers in future.