Don’t get your hopes up.

Just two days after the Santa Clara Valley Transportation Authority insisted the Milpitas Bay Area Rapid Transit Station will be open in June as scheduled, BART called that timeline into question.

Robert Mitroff, BART’s chief planning and development officer, noted at its board of directors meeting Thursday that the agreement between VTA and BART “allows for six months to do for what’s called phase three dynamic testing … as well as pre-revenue testing.” Dynamic testing refers to tests involving trains running on the tracks, as opposed to static testing, which involves non-moving operations.

“So that has not started,” Mitroff said, according to a video of the meeting posted on BART’s website. “That handoff is supposed to take place in March. So if the six-month period goes its entire course, it’s obvious that the June date will not be met.” (March plus six months equals, well, September.)

VTA spokeswoman Brandi Childress had said Tuesday that the agency wouldn’t hand over controls to BART for testing until March or so. “Testing is going very well and we expect to be completed with dynamic testing by March 2018,” she wrote in an update Thursday afternoon on the VTA website. “BART has shared that it may take up to six months to complete its integration testing, operator training, and safety certification. However, VTA is optimistic that with the continued collaboration between VTA and BART, system integration and training could be completed sooner, allowing passenger service to begin by June 2018, the date established with the Federal Transit Administration.”

In an email, Childress wrote, “I’m not aware that we would be at risk of losing funding, most of which we have already received from the federal government.” Of the $2.3 billion project, the federal government chipped in $900 million. VTA has funded and is constructing the project, but BART will be operating the station.

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During its board meeting, a BART director, Rebecca Saltzman, made it clear she doesn’t want the public to think the BART Silicon Valley Extension — which will run through Milpitas to Berryessa — will open in June.

“Is VTA letting people know that June is no longer the date, or what is?” she asked.

“Not officially,” Mitroff replied.

“They’re not continuing to use the June date, right? Publicly?”

Mitroff looked around. “I think they are” a person out of view from the camera said. He frowned and said, “I think they are, actually.”

Saltzman appeared bemused.

“So if I think we can talk to them and figure out if we can just talk about it being done this year. People are going to get disappointed if there are dates out there….” she said. “It’s still great that it’s going to happen this year, but we should be realistic with folks so they know what to expect and can plan based on that.”

Last April, VTA had announced the extension would be ready to open as soon as December 2017. Four months later, it reversed course, saying it was still on track for a June 2018 opening.