diff --git a/test/test-utils.sh b/test/test-utils.sh
index 2dbe112..1290925 100644
--- a/test/test-utils.sh
+++ b/test/test-utils.sh
@@ -37,6 +37,8 @@ BIG_FILE_BLOCK_SIZE=$((25 * 1024 * 1024))
 BIG_FILE_COUNT=1
 # This should be greater than the multipart size
 BIG_FILE_LENGTH=$(($BIG_FILE_BLOCK_SIZE * $BIG_FILE_COUNT))
+# Use C locale, because some tests check for English expressions
+export LC_ALL=C
 export RUN_DIR
 
 # [NOTE]