diff --git a/dirsrvtests/tests/suites/healthcheck/health_config_test.py b/dirsrvtests/tests/suites/healthcheck/health_config_test.py
index 94708562f..f09bc8bb8 100644
--- a/dirsrvtests/tests/suites/healthcheck/health_config_test.py
+++ b/dirsrvtests/tests/suites/healthcheck/health_config_test.py
@@ -167,6 +167,7 @@ def test_healthcheck_RI_plugin_missing_indexes(topology_st):
     MEMBER_DN = 'cn=member,cn=index,cn=userroot,cn=ldbm database,cn=plugins,cn=config'
 
     standalone = topology_st.standalone
+    standalone.config.set("nsslapd-accesslog-logbuffering", "on")
 
     log.info('Enable RI plugin')
     plugin = ReferentialIntegrityPlugin(standalone)
@@ -214,6 +215,7 @@ def test_healthcheck_MO_plugin_missing_indexes(topology_st):
     MO_GROUP_ATTR = 'creatorsname'
 
     standalone = topology_st.standalone
+    standalone.config.set("nsslapd-accesslog-logbuffering", "on")
 
     log.info('Enable MO plugin')
     plugin = MemberOfPlugin(standalone)
@@ -280,6 +282,7 @@ def test_healthcheck_MO_plugin_substring_index(topology_st):
     UNIQUE_MEMBER_DN = 'cn=uniquemember,cn=index,cn=userroot,cn=ldbm database,cn=plugins,cn=config'
 
     standalone = topology_st.standalone
+    standalone.config.set("nsslapd-accesslog-logbuffering", "on")
 
     log.info('Enable MO plugin')
     plugin = MemberOfPlugin(standalone)
diff --git a/src/lib389/lib389/lint.py b/src/lib389/lib389/lint.py
index 61f696e51..460bf64fc 100644
--- a/src/lib389/lib389/lint.py
+++ b/src/lib389/lib389/lint.py
@@ -279,7 +279,7 @@
 from the large group can be slow.
 
 """,
-    'fix': """If not required you can remove the substring index type using dsconf:
+    'fix': """If not required, you can remove the substring index type using dsconf:
 
     # dsconf slapd-YOUR_INSTANCE backend index set --attr=ATTR BACKEND --del-type=sub
 """
diff --git a/src/lib389/lib389/plugins.py b/src/lib389/lib389/plugins.py
index 0a3763096..31bbfa502 100644
--- a/src/lib389/lib389/plugins.py
+++ b/src/lib389/lib389/plugins.py
@@ -831,7 +831,7 @@ def _lint_member_substring_index(self):
         if self.status():
             from lib389.backend import Backends
             backends = Backends(self._instance).list()
-            attrs = self.get_attr_vals_utf8_l("memberofgroupattr")
+            membership_attrs = ['member', 'uniquemember']
             container = self.get_attr_val_utf8_l("nsslapd-plugincontainerscope")
             for backend in backends:
                 suffix = backend.get_attr_val_utf8_l('nsslapd-suffix')
@@ -844,17 +844,12 @@ def _lint_member_substring_index(self):
                         # skip this backend that is not in the scope
                         continue
                 indexes = backend.get_indexes()
-                membership_attrs = ['member', 'uniquemember']
                 for attr in membership_attrs:
                     report = copy.deepcopy(DSMOLE0002)
                     try:
                         index = indexes.get(attr)
                         types = index.get_attr_vals_utf8_l("nsIndexType")
-                        valid = True
                         if "sub" in types:
-                            valid = False
-
-                        if not valid:
                             report['detail'] = report['detail'].replace('ATTR', attr)
                             report['detail'] = report['detail'].replace('BACKEND', suffix)
                             report['fix'] = report['fix'].replace('ATTR', attr)
@@ -864,8 +859,8 @@ def _lint_member_substring_index(self):
                             report['items'].append(attr)
                             report['check'] = f'attr:substring_index'
                             yield report
-                    except:
-                        pass
+                    except KeyError:
+                        continue
 
     def get_attr(self):
         """Get memberofattr attribute"""