diff --git a/tests/letstest/multitester.py b/tests/letstest/multitester.py
index 2dfe7ba35..f97ced98e 100644
--- a/tests/letstest/multitester.py
+++ b/tests/letstest/multitester.py
@@ -552,6 +552,7 @@ def main():
         # add SENTINELs to end client processes
         for i in range(num_processes):
             inqueue.put(SENTINEL)
+        import subprocess
         for p in jobs:
             while p.is_alive():
                 p.join(5 * 60)