diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 602d28f941..498c350546 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -688,6 +688,7 @@ jobs:
           if [[ "${MATRIX_INSTALL_STEPS}" = *'codeset-test'* ]]; then
             export LC_ALL=C
             export LC_CTYPE=C
+            export LC_NUMERIC=fr_FR.UTF-8
           fi
           if [ "${MATRIX_BUILD}" = 'cmake' ]; then
             cmake --build bld --verbose --target "${TEST_TARGET}"
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index c6019d4f70..352e280762 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -483,6 +483,7 @@ jobs:
           if [[ "${MATRIX_INSTALL_STEPS}" = *'codeset-test'* ]]; then
             export LC_ALL=C
             export LC_CTYPE=C
+            export LC_NUMERIC=fr_FR.UTF-8
           fi
           rm -f ~/.curlrc
           if [ "${MATRIX_BUILD}" = 'cmake' ]; then