diff --git a/test/regression/run.py b/test/regression/run.py
index 427f48d47..73172cf04 100644
--- a/test/regression/run.py
+++ b/test/regression/run.py
@@ -165,7 +165,7 @@ def process_dir(d, outfile_results, zipin, result):
     shellparams = {'stdout':outfile_results, 'stderr':outfile_results, 'shell':False}
 
     print("Processing directory " + d)
-    for f in os.listdir(d):
+    for f in sorted(os.listdir(d)):
         fullpath = os.path.join(d, f)
         if os.path.isdir(fullpath) and not f == ".svn":
             process_dir(fullpath, outfile_results, zipin, result)