diff --git a/python/samba/tests/segfault.py b/python/samba/tests/segfault.py
index c6e17ed6ead..cf450a4a1aa 100644
--- a/python/samba/tests/segfault.py
+++ b/python/samba/tests/segfault.py
@@ -184,3 +184,9 @@ class SegfaultTests(samba.tests.TestCase):
     def test_dcerpc_idl_inline_arrays(self):
         """Inline arrays were incorrectly handled."""
         dnsserver.DNS_RPC_SERVER_INFO_DOTNET().pExtensions
+
+    @segfault_detector
+    def test_ldb_dn_explode_crash(self):
+        for i in range(106, 550, 5):
+            dn = ldb.Dn(ldb.Ldb(), "a=b%s,c= " % (' ' * i))
+            dn.validate()
diff --git a/selftest/knownfail.d/python-segfaults b/selftest/knownfail.d/python-segfaults
index 1be0566dcb1..524f7dd013b 100644
--- a/selftest/knownfail.d/python-segfaults
+++ b/selftest/knownfail.d/python-segfaults
@@ -1 +1,2 @@
 samba.tests.segfault.samba.tests.segfault.SegfaultTests.test_net_replicate_init__3
+samba.tests.segfault.samba.tests.segfault.SegfaultTests.test_ldb_dn_explode_crash