diff --git a/ci/do_ci.sh b/ci/do_ci.sh
index c9421a0c90ae8..41d0365849135 100755
--- a/ci/do_ci.sh
+++ b/ci/do_ci.sh
@@ -150,7 +150,7 @@ function run_process_test_result() {
 
 function run_ci_verify () {
   echo "verify examples..."
-  docker load < "$ENVOY_DOCKER_BUILD_DIR/docker/envoy-docker-images.tar.xz"
+  LC_ALL=C docker load < "$ENVOY_DOCKER_BUILD_DIR/docker/envoy-docker-images.tar.xz"
   _images=$(docker image list --format "{{.Repository}}")
   while read -r line; do images+=("$line"); done \
       <<< "$_images"
diff --git a/ci/docker_ci.sh b/ci/docker_ci.sh
index 439647ebe779b..98e869e4fa92a 100755
--- a/ci/docker_ci.sh
+++ b/ci/docker_ci.sh
@@ -144,7 +144,7 @@ done
 mkdir -p "${ENVOY_DOCKER_IMAGE_DIRECTORY}"
 ENVOY_DOCKER_TAR="${ENVOY_DOCKER_IMAGE_DIRECTORY}/envoy-docker-images.tar.xz"
 echo "Saving built images to ${ENVOY_DOCKER_TAR}."
-docker save "${IMAGES_TO_SAVE[@]}" | xz -T0 -2 >"${ENVOY_DOCKER_TAR}"
+LC_ALL=C docker save "${IMAGES_TO_SAVE[@]}" | LC_ALL=C xz -T0 -2 >"${ENVOY_DOCKER_TAR}"
 
 # Only push images for main builds, release branch builds, and tag builds.
 if [[ "${AZP_BRANCH}" != "${MAIN_BRANCH}" ]] &&
diff --git a/test/exe/version_out_test.sh b/test/exe/version_out_test.sh
index 6308287a2ce01..2adc293236c40 100755
--- a/test/exe/version_out_test.sh
+++ b/test/exe/version_out_test.sh
@@ -2,6 +2,9 @@
 
 set -e -o pipefail
 
+# Undo LC_ALL=en_US.UTF-8, since it breaks sed.
+export LC_ALL=C
+
 ENVOY_BIN="${TEST_SRCDIR}/envoy/source/exe/envoy-static"
 
 COMMIT=$(${ENVOY_BIN} --version | \