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-rwxr-xr-xtests/run-multitests.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/tests/run-multitests.py b/tests/run-multitests.py
index edf2238a5..4e5bfc3b0 100755
--- a/tests/run-multitests.py
+++ b/tests/run-multitests.py
@@ -382,6 +382,9 @@ def main():
cmd_parser.add_argument("files", nargs="+", help="input test files")
cmd_args = cmd_parser.parse_args()
+ # clear search path to make sure tests use only builtin modules and those in extmod
+ os.environ['MICROPYPATH'] = os.pathsep + '../extmod'
+
test_files = prepare_test_file_list(cmd_args.files)
max_instances = max(t[1] for t in test_files)