A P-plater is accused of being on drugs when she allegedly crashed and killed her younger sister in southeast Melbourne.
Nikkita Wells died at Rowville on February 17 last year.
Her 22-year-old sister, Mikayla, is among three people charged with dangerous driving causing the teen's death.
Documents released by Melbourne Magistrates Court on Tuesday allege the elder sister was behind the wheel while under the influence of cannabis.
The P-plater is accused of changing lanes in a reckless manner at the time of the crash.
Two others, Damien Hill and Troy Elsbury-Burn, both 29, are also charged with dangerous driving causing death.
They allegedly raced each other for 28km, through freeways and suburban roads, until the crash.
A committal hearing, to determine whether there's enough evidence for the trio to stand trial, has been delayed until July 2021 because of the COVID-19 pandemic.
Twelve civilians and three police officers are expected to be questioned over the crash when the case returns to court.
In a Facebook post, Mikayla Wells said the pain of her sister's loss was "indescribable".
"I would like to wish my baby sister and my best friend a big Happy 19th Birthday in heaven, to think this is the second birthday we have spent without you literally kills me," said wrote on Monday.
"There isn't a day where I'm not crying, I hate that I have to live the rest of my life without you and I don't think there will ever be a day where I fully come to terms with losing you."