diff --git a/ci/scripts/bitcoin_core_ci.sh b/ci/scripts/bitcoin_core_ci.sh
index cba022d4..7f3c5cbd 100755
--- a/ci/scripts/bitcoin_core_ci.sh
+++ b/ci/scripts/bitcoin_core_ci.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+export LC_ALL=C
+
 set -o errexit -o nounset -o pipefail -o xtrace
 
 readonly SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
diff --git a/ci/scripts/ci_helpers.sh b/ci/scripts/ci_helpers.sh
index dbd11418..1b6d0121 100755
--- a/ci/scripts/ci_helpers.sh
+++ b/ci/scripts/ci_helpers.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+export LC_ALL=C
+
 set -o errexit -o nounset -o pipefail -o xtrace
 
 write_env_var() {
diff --git a/ci/scripts/config.sh b/ci/scripts/config.sh
index f115ad5f..7fe8118d 100755
--- a/ci/scripts/config.sh
+++ b/ci/scripts/config.sh
@@ -6,6 +6,8 @@
 #
 # Source CI configuration and output variables needed by the workflow.
 
+export LC_ALL=C
+
 set -o errexit -o nounset -o pipefail -o xtrace
 
 readonly SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"