diff --git a/ci/ci.sh b/ci/ci.sh
index c7d2e9e4ea..e3cd538556 100755
--- a/ci/ci.sh
+++ b/ci/ci.sh
@@ -1,9 +1,9 @@
 #!/bin/sh
 
-set -eux
-
 export LC_ALL=C
 
+set -eux
+
 # Print commit and relevant CI environment to allow reproducing the job outside of CI.
 git show --no-patch
 print_environment() {
diff --git a/ci/test/07_script.sh b/ci/test/07_script.sh
index cadb6e557e..f56b072d3b 100755
--- a/ci/test/07_script.sh
+++ b/ci/test/07_script.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+export LC_ALL=C
+
 echo "UPLOAD ARTIFACTS"
 
 if [[ "$ARTIFACT_NAME" == "" ]]; then
@@ -27,4 +29,4 @@ curl -X POST \
   --data-binary @$fpath \
   --header "Authorization: token $GITHUB_TOKEN" \
   --header "Content-Type: $file_content_type" \
-  $url_to_upload
\ No newline at end of file
+  $url_to_upload
diff --git a/contrib/devtools/split-debug.sh b/contrib/devtools/split-debug.sh
index 3822fd1310..215c995092 100755
--- a/contrib/devtools/split-debug.sh
+++ b/contrib/devtools/split-debug.sh
@@ -1,4 +1,6 @@
 #!/bin/sh
+export LC_ALL=C
+
 set -e
 if [ $# -ne 3 ];
     then echo "usage: $0 <input> <stripped-binary> <debug-binary>"
diff --git a/contrib/travis.sh b/contrib/travis.sh
index 88061b743a..d09f0829e1 100755
--- a/contrib/travis.sh
+++ b/contrib/travis.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+export LC_ALL=C
+
 set -e
 set -x
 
diff --git a/debian.minimal/build-in-docker.sh b/debian.minimal/build-in-docker.sh
index 494fb6ea6e..fa67a10731 100755
--- a/debian.minimal/build-in-docker.sh
+++ b/debian.minimal/build-in-docker.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+export LC_ALL=C
+
 set -e
 
 debuild -S
diff --git a/debian.minimal/test.sh b/debian.minimal/test.sh
index 6f0e177ba7..bc18af7bbd 100755
--- a/debian.minimal/test.sh
+++ b/debian.minimal/test.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+export LC_ALL=C
+
 #finish() {
 #    docker stop $container >/dev/null
 #    docker container rm $container >/dev/null
diff --git a/debian.qt/build-in-docker.sh b/debian.qt/build-in-docker.sh
index 014c7b885f..dafbbcff46 100755
--- a/debian.qt/build-in-docker.sh
+++ b/debian.qt/build-in-docker.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+export LC_ALL=C
+
 set -e
 
 debuild -S
diff --git a/debian.qt/test.sh b/debian.qt/test.sh
index 49aa7fcef9..cbb7fa088b 100755
--- a/debian.qt/test.sh
+++ b/debian.qt/test.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+export LC_ALL=C
+
 finish() {
     docker stop $container >/dev/null
     docker container rm $container >/dev/null
diff --git a/debian.qt/updateunattended.sh b/debian.qt/updateunattended.sh
index 0078ab3d7b..8241bfa28d 100755
--- a/debian.qt/updateunattended.sh
+++ b/debian.qt/updateunattended.sh
@@ -1,4 +1,6 @@
 #!/bin/bash
+export LC_ALL=C
+
 export DEBIAN_FRONTEND=noninteractive
 export TZ=Etc/UTC
 apt-get update && apt-get install -y tzdata