diff --git a/docs/docker-compose/teuthology/Dockerfile b/docs/docker-compose/teuthology/Dockerfile
index be1799512..c9926bab3 100644
--- a/docs/docker-compose/teuthology/Dockerfile
+++ b/docs/docker-compose/teuthology/Dockerfile
@@ -1,6 +1,7 @@
 FROM ubuntu:22.04
 ARG SSH_PRIVKEY_FILE=id_ed25519
 ENV DEBIAN_FRONTEND=noninteractive
+ENV LC_ALL=C.UTF-8
 RUN apt-get update && \
     apt-get install -y \
     git \
@@ -16,8 +17,10 @@ RUN apt-get update && \
     libvirt-dev \
     libffi-dev \
     libyaml-dev \
+    locales \
     lsb-release && \
-    apt-get clean all
+    apt-get clean all && \
+    locale-gen $LC_ALL
 WORKDIR /teuthology
 COPY requirements.txt requirements.yml ansible.cfg bootstrap /teuthology/
 RUN \