diff --git a/tools/run_tests/python_utils/comment_on_pr.py b/tools/run_tests/python_utils/comment_on_pr.py
new file mode 100644
index 0000000000000000000000000000000000000000..7f39671659d99e09ed66d3f74581e6f74f086a0f
--- /dev/null
+++ b/tools/run_tests/python_utils/comment_on_pr.py
@@ -0,0 +1,50 @@
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import os
+import urllib2
+
+def comment_on_pr(text):
+  if 'JENKINS_OAUTH_TOKEN' not in os.environ:
+    print 'Missing JENKINS_OAUTH_TOKEN env var: not commenting'
+    return
+  if 'ghprbPullId' not in os.environ:
+    print 'Missing ghprbPullId env var: not commenting'
+    return
+  req = urllib2.Request(
+      url = 'https://api.github.com/repos/grpc/grpc/issues/%s/comments' %
+          os.environ('ghprbPullId'),
+      data = json.dumps({'body': text}),
+      headers = {
+        'Authorization': 'token %s' % os.environ['JENKINS_OAUTH_TOKEN'],
+        'Content-Type': 'application/json',
+      })
+  with urllib2.urlopen(req) as rsp:
+    print rsp.read()
+