Fix PRESUBMIT.py

NOTRY=True
TBR=kjellander@webrtc.org

Bug: webrtc:8197
Change-Id: Ie8b50faec7c6c5f7b9dd259c8312e4cec5748a42
Reviewed-on: https://webrtc-review.googlesource.com/1361
Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org>
Reviewed-by: Charu Jain <charujain@webrtc.org>
Reviewed-by: Edward Lemur <ehmaldonado@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19838}
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 1666c6b..927869f 100755
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -493,7 +493,7 @@
     return input_api.os_path.join(input_api.PresubmitLocalPath(), *args)
 
   test_directories = [
-      '/',
+      input_api.PresubmitLocalPath(),
       Join('webrtc', 'rtc_tools', 'py_event_log_analyzer'),
       Join('webrtc', 'rtc_tools'),
       Join('webrtc', 'audio', 'test', 'unittests'),