Goldcorp is denying allegations it breached any confidentially agreement it had with Osisko Mining.
A Quebec court has set March 3 to the 5 to hear the matter.
Osisko alleges Goldcorp misused confidential information in making its 2-point-6 billion dollar take-over bid last month.
The offer was to expire February 19, but Goldcorp has now giving Osisko's shareholders until March 10 to consider.