The Russian state system of certification levels for general proficiency in Russian as a foreign language (TORFL) includes the following test system:

• TEU — Test in Russian as a foreign language. Elementary level (A 1);
• TBU — Test in Russian as a foreign language. Basic level (A 2);
• TRKI 1 — Test in Russian as a foreign language. First certification level (B 1);
• TRKI 2 — Test in Russian as a foreign language. Second certification level (B 2);
• TRKI 3 — Test in Russian as a foreign language. Third certification level (C 1);
• TRKI 4 — Test in Russian as a foreign language. Fourth certification level (C 2).

The Russian state system of certification levels for general proficiency in Russian as a foreign language correlates with the testing systems adopted in other countries.