diff --git a/test_runner/regress/test_compaction.py b/test_runner/regress/test_compaction.py
index e5f5b80d2d..6789939e0c 100644
--- a/test_runner/regress/test_compaction.py
+++ b/test_runner/regress/test_compaction.py
@@ -166,6 +166,7 @@ def test_pageserver_compaction_preempt(
 
 
 @skip_in_debug_build("only run with release build")
+@pytest.mark.timeout(900)  # This test is slow with sanitizers enabled, especially on ARM
 @pytest.mark.parametrize(
     "with_branches",
     ["with_branches", "no_branches"],