diff --git a/.kokoro/trampoline.sh b/.kokoro/trampoline.sh
index 0594b12728d7..10653acd07cb 100755
--- a/.kokoro/trampoline.sh
+++ b/.kokoro/trampoline.sh
@@ -18,6 +18,9 @@
 # or zero if all commands in the pipeline exit successfully.
 set -eo pipefail
 
+export KOKORO_ROOT="${KOKORO_ROOT:-/tmpfs}"
+
+
 # Always run the cleanup script, regardless of the success of bouncing into
 # the container.
 function cleanup() {
diff --git a/packages/google-cloud-vision/google/cloud/vision_helpers/__init__.py b/packages/google-cloud-vision/google/cloud/vision_helpers/__init__.py
index 47ccb7ceab9b..c19d7bc65494 100644
--- a/packages/google-cloud-vision/google/cloud/vision_helpers/__init__.py
+++ b/packages/google-cloud-vision/google/cloud/vision_helpers/__init__.py
@@ -17,6 +17,8 @@
 import proto  # type: ignore
 from google.api_core import protobuf_helpers as protobuf
 
+# Trigger comment for system tests
+
 
 class VisionHelpers(object):
     """A set of convenience methods to make the Vision GAPIC easier to use.