diff --git a/ucompile b/ucompile
index 7b2158c..d06645b 100755
--- a/ucompile
+++ b/ucompile
@@ -23,8 +23,8 @@ def run_input_cases(program, args):
     tests_dir = args.tests_dir if args.tests_dir else "."
     time_flag = args.time
 
-    input_files = glob(os.path.join(tests_dir, "*.in"))
-
+    input_files = sorted(glob(os.path.join(tests_dir, "*.in")), key=os.path.getmtime)
+    
     if len(input_files) < 1:
         if time_flag:
             start_time = time.perf_counter()