diff --git a/doc/go1.17.html b/doc/go1.17.html
index a1118cf50a..f9156a30dc 100644
--- a/doc/go1.17.html
+++ b/doc/go1.17.html
@@ -659,7 +659,11 @@ Do not send CLs removing the interior tags from such phrases.
 <dl id="testing"><dt><a href="/pkg/testing/">testing</a></dt>
   <dd>
     <p><!-- CL 310033 -->
-      Added a new <a href="/cmd/go/#hdr-Testing_flags"></a>testing flag</a> <code>-shuffle</code> which alters the execution order of tests and benchmarks.
+      Added a new <a href="/cmd/go/#hdr-Testing_flags">testing flag</a> <code>-shuffle</code> which alters the execution order of tests and benchmarks.
+    </p>
+    <p><!-- CL 260577 -->
+      <code>testing.T</code> now has a <a href="/pkg/testing/#T.Setenv"><code>Setenv</code></a> method to set up environment variables
+      only for the isolated lifetime of the test, and will clean up and unset these variables when the test ends.
     </p>
 
     <p><!-- CL 260577 -->