diff --git a/x-pack/plugins/observability_solution/slo/public/pages/slos/components/grouped_slos/hooks/use_group_name.test.ts b/x-pack/plugins/observability_solution/slo/public/pages/slos/components/grouped_slos/hooks/use_group_name.test.ts
new file mode 100644
index 00000000000000..fa2b5192665ea7
--- /dev/null
+++ b/x-pack/plugins/observability_solution/slo/public/pages/slos/components/grouped_slos/hooks/use_group_name.test.ts
@@ -0,0 +1,76 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { SLO_SUMMARY_DESTINATION_INDEX_PATTERN } from '../../../../../../common/constants';
+import { GroupSummary } from '@kbn/slo-schema';
+import { useGroupName } from './use_group_name';
+
+describe('useGroupName', () => {
+  it('returns the group name for ungrouped', () => {
+    const groupName = useGroupName('ungrouped', 'irrelevant', {} as GroupSummary);
+    expect(groupName).toBe('irrelevant');
+  });
+
+  it('returns the group name for slo tags', () => {
+    const groupName = useGroupName('slo.tags', 'some-tag', {} as GroupSummary);
+    expect(groupName).toBe('some-tag');
+  });
+
+  it('returns the group name for status', () => {
+    const groupName = useGroupName('status', 'HEALTHY', {} as GroupSummary);
+    expect(groupName).toBe('healthy');
+  });
+
+  it('returns the group name for slo instanceId', () => {
+    const summary = {
+      total: 2,
+      violated: 0,
+      healthy: 2,
+      degrading: 0,
+      noData: 0,
+      worst: {
+        sliValue: 1,
+        status: 'healthy',
+        slo: {
+          id: 'slo-id',
+          name: 'slo-name',
+          instanceId: 'domain.com',
+          groupings: {
+            host: {
+              name: 'domain.com',
+            },
+          },
+        },
+      },
+    } as GroupSummary;
+    const groupName = useGroupName('slo.instanceId', 'domain.com', summary);
+    expect(groupName).toBe('host.name: domain.com');
+  });
+
+  it('returns the group name for slo indicator type', () => {
+    const groupName = useGroupName('slo.indicator.type', 'sli.kql.custom', {} as GroupSummary);
+    expect(groupName).toBe('Custom Query');
+  });
+
+  it('returns the group name for local index', () => {
+    const groupName = useGroupName(
+      '_index',
+      SLO_SUMMARY_DESTINATION_INDEX_PATTERN,
+      {} as GroupSummary
+    );
+    expect(groupName).toBe('Local Kibana');
+  });
+
+  it('returns the group name for remote index', () => {
+    const groupName = useGroupName(
+      '_index',
+      `my-remote-cluster:${SLO_SUMMARY_DESTINATION_INDEX_PATTERN}`,
+      {} as GroupSummary
+    );
+    expect(groupName).toBe('Remote Cluster: my-remote-cluster');
+  });
+});
diff --git a/x-pack/plugins/observability_solution/slo/public/pages/slos/components/grouped_slos/hooks/use_group_name.ts b/x-pack/plugins/observability_solution/slo/public/pages/slos/components/grouped_slos/hooks/use_group_name.ts
index 45e09337cde99a..ca6ddff88fb19f 100644
--- a/x-pack/plugins/observability_solution/slo/public/pages/slos/components/grouped_slos/hooks/use_group_name.ts
+++ b/x-pack/plugins/observability_solution/slo/public/pages/slos/components/grouped_slos/hooks/use_group_name.ts
@@ -11,7 +11,7 @@ import { assertNever } from '@kbn/std';
 import { SLI_OPTIONS } from '../../../../slo_edit/constants';
 import { GroupByField } from '../../slo_list_group_by';
 
-export function useGroupName(groupBy: GroupByField, group: string, summary: GroupSummary) {
+export function useGroupName(groupBy: GroupByField, group: string, summary?: GroupSummary) {
   const groupName = group.toLowerCase();
 
   switch (groupBy) {
@@ -20,7 +20,7 @@ export function useGroupName(groupBy: GroupByField, group: string, summary: Grou
     case 'status':
       return groupName;
     case 'slo.instanceId':
-      if (groupName === ALL_VALUE) {
+      if (groupName === ALL_VALUE || !summary) {
         return i18n.translate('xpack.slo.group.ungroupedInstanceId', {
           defaultMessage: 'Ungrouped',
         });