SPRINGFIELD, Mass. — Massachusetts' first resort casino has been given the green light to open after a successful test run.

The Massachusetts Gaming Commission on Wednesday granted formal approval for the grand opening of MGM Springfield on Friday.

Commission officials observed dry runs of gambling operations Aug. 16 and Aug. 20 at the $960-million casino, hotel and entertainment complex.

The commission says it will continue to monitor casino operations post-opening and issue a final operations certificate in September.

The casino is considered the first of its kind for Massachusetts.

A more modest slots parlor is open near Rhode Island and Wynn Resorts plans to open a large resort near Boston next year.

The Native American tribes that operate Foxwoods and Mohegan Sun resorts also propose another Connecticut casino to compete with MGM Springfield.