diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
index 8ae7677f3b2..81ca156f8c9 100755
--- a/test/functional/test_framework/test_node.py
+++ b/test/functional/test_framework/test_node.py
@@ -200,6 +200,9 @@ class TestNode():
         if stderr != expected_stderr:
             raise AssertionError("Unexpected stderr {} != {}".format(stderr, expected_stderr))
 
+        self.stdout.close()
+        self.stderr.close()
+
         del self.p2ps[:]
 
     def is_node_stopped(self):