During this test a special WoT update v. 7.0_test4 will be available for playing on test servers only. The general test will run until 9 December.[...]
List of v7.0 test4 changes as compared with v7.0 test3:
Fixed bug with log records as initial credits and gold added to player’s account;
Fixed effects in a sniper mode;
Fixed bugs causing reduced performance;
Temporarily only one test server will be available.