diff --git a/test/dotc/tests.scala b/test/dotc/tests.scala
index 7edbd9e8c55e..0ac043daf5e0 100644
--- a/test/dotc/tests.scala
+++ b/test/dotc/tests.scala
@@ -7,7 +7,7 @@ import org.junit.experimental.categories._
 
 import scala.io.Source
 
-
+// tests that match regex '(pos|dotc|run|java|compileStdLib)\.*' would be executed as benchmarks.
 class tests extends CompilerTest {
 
   def isRunByJenkins: Boolean = sys.props.isDefinedAt("dotty.jenkins.build")