From 8d6f4619e3eb17250d35d52f3192e21f24c5750e Mon Sep 17 00:00:00 2001
From: Hope Casey-Allen <hcaseyal@google.com>
Date: Tue, 24 Apr 2018 15:31:40 -0700
Subject: [PATCH] Update the run tests instructions to clarify a python module
 error

---
 tools/run_tests/README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/run_tests/README.md b/tools/run_tests/README.md
index ceddc21a984..64d67e47d9e 100644
--- a/tools/run_tests/README.md
+++ b/tools/run_tests/README.md
@@ -14,6 +14,8 @@ Builds gRPC in given language and runs unit tests. Use `tools/run_tests/run_test
 - `--use_docker` Builds a docker container containing all the prerequisites for given language and runs the tests under that container.
 - `--build_only` Only build, do not run the tests.
 
+Note: If you get an error such as `ImportError: No module named httplib2`, then you may be missing some Python modules. Install the module listed in the error and try again. 
+
 Note: some tests may be flaky. Check the "Issues" tab for known flakes and other issues.
 
 The full suite of unit tests will take many minutes to run.