Amazon is not finished in its fight to undo a vote by workers to form a union at one of its factories in Staten Island, New York. Now the online retail giant is having its day in court in hopes of making the unionization election victory a short-lived one.

On Monday, representatives from Amazon were allowed to make their case before a federal judge that the election was flawed. Among Amazon's complaints was that federal officials at the National Labor Relations Board (NLRB) branch in Brooklyn were biased against the company and facilitated the workers’ victory.

Amazon also questioned some of the organizers' tactics, including accusations that union leaders effectively bribing fellow workers to vote in favor of unionization through offers of free marijuana. Organizers denied that offers of marijuana were used as bribes ahead of the final union vote on April 1, but it was previously reported that free marijuana was distributed during the campaign.

Organizers at Amazon’s largest warehouse on Staten Island voted to form a union, the first successful effort to do so among the company’s U.S. workers. It was hailed as a landmark victory for labor activists and was praised by President Joe Biden, who also voiced support for a failed unionization bid by Amazon workers in Alabama last year.

Amazon’s charges against the union organizers comes against the backdrop of complaints against its own tactics of discouraging workers from unionizing. This claims include the hiring of professional union "avoidance consultants," persistent anti-union advertising online and offline, and even calling local police on union activists for seemingly mundane actions.

Last month, the NLRB Brooklyn office found merit to complaints filed by workers accusing Amazon of of threatening to withhold benefits from employees if they voted to unionize and for inaccurately telling employees they could be fired if they formed a union or failed to pay dues, according to the New York Times.