diff --git a/appengine/runtime_builders/template_builder.sh b/appengine/runtime_builders/template_builder.sh
index eef41786f..63c44c8fb 100644
--- a/appengine/runtime_builders/template_builder.sh
+++ b/appengine/runtime_builders/template_builder.sh
@@ -11,5 +11,5 @@ fi
 source "$KOKORO_GFILE_DIR/common.sh"
 
 cd github
-yes | sudo pip3 install ruamel.yaml
+yes | sudo -E pip3 install ruamel.yaml
 python3 runtimes-common/appengine/runtime_builders/template_builder.py -f "${KOKORO_GFILE_DIR}/${CONFIG_FILE}"
diff --git a/hack/kokoro-test.sh b/hack/kokoro-test.sh
index 01126c4e8..b69f2fc8e 100755
--- a/hack/kokoro-test.sh
+++ b/hack/kokoro-test.sh
@@ -15,7 +15,7 @@ fi
 
 pushd github/runtimes-common
 # Install deps.
-sudo pip install --upgrade -r requirements.txt
+sudo -E pip install --upgrade -r requirements.txt
 
 echo "Running unit tests..."
 # Run the tests.