diff --git a/src/core/ndisc/tests/test-ndisc-fake.c b/src/core/ndisc/tests/test-ndisc-fake.c
index 457dcf198..d2704a080 100644
--- a/src/core/ndisc/tests/test-ndisc-fake.c
+++ b/src/core/ndisc/tests/test-ndisc-fake.c
@@ -33,6 +33,7 @@ ndisc_new(void)
     memset(&iid, 0, sizeof(iid));
     iid.id_u8[7] = 1;
     nm_ndisc_set_iid(ndisc, iid, FALSE);
+    g_object_unref(l3cfg);
 
     return NM_FAKE_NDISC(ndisc);
 }