diff --git a/test/hil/hil_test.py b/test/hil/hil_test.py
index 8f0a8c93a..158841687 100644
--- a/test/hil/hil_test.py
+++ b/test/hil/hil_test.py
@@ -358,7 +358,7 @@ def main():
         if 'tests' in item:
             test_list = item['tests'] + ['board_test']
         else:
-            test_list = all_tests
+            test_list = list(all_tests)
 
         # remove skip_tests
         if 'tests_skip' in item:
diff --git a/test/hil/rpi.json b/test/hil/rpi.json
index 44edb7de0..98d576db8 100644
--- a/test/hil/rpi.json
+++ b/test/hil/rpi.json
@@ -41,6 +41,8 @@
         {
             "name": "ra4m1_ek",
             "uid": "152E163038303131393346E46F26574B",
+            "tests_skip": ["cdc_msc", "cdc_msc_freertos"],
+            "comment": "MSC is slow to enumerated #2602",
             "flasher": "jlink",
             "flasher_sn": "000831174392",
             "flasher_args": "-device R7FA4M1AB"