diff --git a/src/testing/benchmark.go b/src/testing/benchmark.go
index 3a7da9e540..6919341ef7 100644
--- a/src/testing/benchmark.go
+++ b/src/testing/benchmark.go
@@ -426,9 +426,9 @@ func (b *B) loopSlowPath() bool {
 // The compiler never optimizes away calls to functions within the body of a
 // "for b.Loop() { ... }" loop. This prevents surprises that can otherwise occur
 // if the compiler determines that the result of a benchmarked function is
-// unused. The loop must be written in exactly this form, and this only applies
-// to calls syntactically between the curly braces of the loop. Optimizations
-// are performed as usual in any functions called by the loop.
+// unused. The loop condition must be written in exactly as "b.Loop()", and this
+// only applies to calls syntactically between the curly braces of the loop.
+// Optimizations are performed as usual in any functions called by the loop.
 //
 // After Loop returns false, b.N contains the total number of iterations that
 // ran, so the benchmark may use b.N to compute other average metrics.