diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
index 90b333f45a7..ed7645e3331 100755
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -365,7 +365,7 @@ def run_tests(*, test_list, src_dir, build_dir, tmpdir, jobs=1, enable_coverage=
         tmpdir=tmpdir,
         test_list=test_list,
         flags=flags,
-        timeout_duration=20 * 60 if runs_ci else float('inf'),  # in seconds
+        timeout_duration=40 * 60 if runs_ci else float('inf'),  # in seconds
     )
     start_time = time.time()
     test_results = []