diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 540cd527410f..a5941679a13c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,6 +57,8 @@ jobs:
         ports:
           - 5432:5432
         env:
+          LC_ALL: C.UTF-8
+          LANG: C.UTF-8
           POSTGRES_HOST_AUTH_METHOD: trust  # never do this in production!
         # Set health checks to wait until postgres has started
         options: --health-cmd "pg_isready --username=postgres --dbname=postgres" --health-interval 10s --health-timeout 5s --health-retries 5