diff --git a/platform/testFramework/src/com/intellij/TestCaseLoader.java b/platform/testFramework/src/com/intellij/TestCaseLoader.java
index 65e707058af0..a40cbc07c5d1 100644
--- a/platform/testFramework/src/com/intellij/TestCaseLoader.java
+++ b/platform/testFramework/src/com/intellij/TestCaseLoader.java
@@ -183,6 +183,7 @@ public class TestCaseLoader {
 
   private static List<String> getTeamCityRankList() {
     if (TestAll.isPerformanceTestsRun()) {
+      // let performance test order be stable to decrease the variation in their timings
       return Collections.emptyList();
     }