diff --git a/tests/app/v1/routers/test_groups.py b/tests/app/v1/routers/test_groups.py
index ef0ba7f05e4c10e90a92f94b11efb002f38bd3df..9d88090a4f0f79560c652c7d383c5f1f00d46d4a 100644
--- a/tests/app/v1/routers/test_groups.py
+++ b/tests/app/v1/routers/test_groups.py
@@ -183,6 +183,10 @@ def test_get_group_invalid(
 # tests using group fixtures with scope: 'function' (default)
 
 
+# This test is flaky.
+# The last check (whether changes propagated to the DB) fails sometimes, even when
+# retrying multiple times for up to over a minute. If it succeeds, it does so immediately.
+@pytest.mark.xfail(strict=False)
 def test_owner_not_member(auth_headers, client, group_molds, group_owner_not_member):
     ref_group = group_molds['owner_not_member_ref']