diff --git a/system_tests/app_engine_test_app/requirements.txt b/system_tests/app_engine_test_app/requirements.txt
index bd5c476..e390e14 100644
--- a/system_tests/app_engine_test_app/requirements.txt
+++ b/system_tests/app_engine_test_app/requirements.txt
@@ -1,3 +1,3 @@
 urllib3
 # Relative path to google-auth-python's source.
-../../..
+../..