diff --git a/src/testing/testing.go b/src/testing/testing.go
index 0df6e45ec4..056a8d2879 100644
--- a/src/testing/testing.go
+++ b/src/testing/testing.go
@@ -190,7 +190,7 @@
 //         }
 //     }
 //
-// The race detector kills the program if it exceeds 8192 concurrent goroutines,
+// The race detector kills the program if it exceeds 8128 concurrent goroutines,
 // so use care when running parallel tests with the -race flag set.
 //
 // Run does not return until parallel subtests have completed, providing a way