"We presented the system to the customer for final tests currently underway," Russian Space Systems (RSS) Director General Andrei Tyulin told the Izvestiya daily.
Tyulin said tests resumed on Saturday after the company remedied problems previously identified by the ministry.
"Not to get ahead of ourselves, but I can say we are making every effort to complete this work. We hope that the system will be put into operation after testing," the RSS head added.
The ministry is testing GLONASS as a development project, the daily reported.
Operated by the Russian Aerospace Defense Forces and launched in 1993, GLONASS is seen as Russia's version of the US Global Positioning System (GPS).