diff --git a/test_runner/batch_others/test_ancestor_branch.py b/test_runner/batch_others/test_ancestor_branch.py
index 1b1da5b58b..30effbed4d 100644
--- a/test_runner/batch_others/test_ancestor_branch.py
+++ b/test_runner/batch_others/test_ancestor_branch.py
@@ -6,7 +6,8 @@ from fixtures.neon_fixtures import NeonEnv, NeonEnvBuilder, NeonPageserverApiExc
 #
 # Create ancestor branches off the main branch.
 #
-def test_ancestor_branch(neon_env_builder: NeonEnvBuilder):
+@pytest.mark.parametrize("x", range(20))
+def test_ancestor_branch(neon_env_builder: NeonEnvBuilder, x: int):
     env = neon_env_builder.init_start()
 
     # Override defaults, 1M gc_horizon and 4M checkpoint_distance.