diff --git a/tests/functional/qemu_test/testcase.py b/tests/functional/qemu_test/testcase.py
index 71c7160adc..2a78e735f1 100644
--- a/tests/functional/qemu_test/testcase.py
+++ b/tests/functional/qemu_test/testcase.py
@@ -19,6 +19,7 @@ import shutil
 from subprocess import run
 import sys
 import tempfile
+import warnings
 import unittest
 import uuid
 
@@ -235,6 +236,9 @@ class QemuBaseTest(unittest.TestCase):
         self._log_fh.close()
 
     def main():
+        warnings.simplefilter("default")
+        os.environ["PYTHONWARNINGS"] = "default"
+
         path = os.path.basename(sys.argv[0])[:-3]
 
         cache = os.environ.get("QEMU_TEST_PRECACHE", None)