diff --git a/pkg/cmd/shared/config/config.go b/pkg/cmd/shared/config/config.go
index 5cd89230..94bb1929 100644
--- a/pkg/cmd/shared/config/config.go
+++ b/pkg/cmd/shared/config/config.go
@@ -15,8 +15,10 @@ func GetSynonyms(client *search.APIClient, srcIndex string) ([]search.SynonymHit
 		srcIndex,
 		*search.NewEmptySearchSynonymsParams(),
 		search.WithAggregator(func(res any, _ error) {
-			response, _ := res.(search.SearchSynonymsResponse)
-			synonyms = append(synonyms, response.Hits...)
+			// The client passes a pointer to the aggregator, which is nil on request failure.
+			if response, ok := res.(*search.SearchSynonymsResponse); ok && response != nil {
+				synonyms = append(synonyms, response.Hits...)
+			}
 		}),
 	)
 	if err != nil {
@@ -32,8 +34,10 @@ func GetRules(client *search.APIClient, srcIndex string) ([]search.Rule, error)
 		srcIndex,
 		*search.NewEmptySearchRulesParams(),
 		search.WithAggregator(func(res any, _ error) {
-			response, _ := res.(search.SearchRulesResponse)
-			rules = append(rules, response.Hits...)
+			// The client passes a pointer to the aggregator, which is nil on request failure.
+			if response, ok := res.(*search.SearchRulesResponse); ok && response != nil {
+				rules = append(rules, response.Hits...)
+			}
 		}),
 	)
 	if err != nil {
diff --git a/pkg/cmd/shared/config/config_test.go b/pkg/cmd/shared/config/config_test.go
new file mode 100644
index 00000000..9f7590d1
--- /dev/null
+++ b/pkg/cmd/shared/config/config_test.go
@@ -0,0 +1,83 @@
+package config
+
+import (
+	"testing"
+
+	"github.com/algolia/algoliasearch-client-go/v4/algolia/search"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/algolia/cli/pkg/httpmock"
+	"github.com/algolia/cli/test"
+)
+
+func TestGetIndexConfig(t *testing.T) {
+	tests := []struct {
+		name         string
+		scope        []string
+		wantSettings bool
+		wantRules    []string
+		wantSynonyms []string
+	}{
+		{
+			name:         "all scopes",
+			scope:        []string{"settings", "synonyms", "rules"},
+			wantSettings: true,
+			wantRules:    []string{"rule-1", "rule-2"},
+			wantSynonyms: []string{"syn-1"},
+		},
+		{
+			name:      "rules only",
+			scope:     []string{"rules"},
+			wantRules: []string{"rule-1", "rule-2"},
+		},
+		{
+			name:         "synonyms only",
+			scope:        []string{"synonyms"},
+			wantSynonyms: []string{"syn-1"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			r := httpmock.Registry{}
+			r.Register(
+				httpmock.REST("GET", "1/indexes/foo/settings"),
+				httpmock.JSONResponse(search.SettingsResponse{}),
+			)
+			r.Register(
+				httpmock.REST("POST", "1/indexes/foo/rules/search"),
+				httpmock.JSONResponse(search.SearchRulesResponse{
+					Hits: []search.Rule{{ObjectID: "rule-1"}, {ObjectID: "rule-2"}},
+				}),
+			)
+			r.Register(
+				httpmock.REST("POST", "1/indexes/foo/synonyms/search"),
+				httpmock.JSONResponse(search.SearchSynonymsResponse{
+					Hits: []search.SynonymHit{{ObjectID: "syn-1", Type: search.SYNONYM_TYPE_SYNONYM}},
+				}),
+			)
+
+			f, _ := test.NewFactory(true, &r, nil, "")
+			client, err := f.SearchClient()
+			require.NoError(t, err)
+
+			got, err := GetIndexConfig(client, "foo", tt.scope, f.IOStreams.ColorScheme())
+			require.NoError(t, err)
+
+			assert.Equal(t, tt.wantSettings, got.Settings != nil)
+
+			var rules []string
+			for _, rule := range got.Rules {
+				rules = append(rules, rule.ObjectID)
+			}
+			assert.Equal(t, tt.wantRules, rules)
+
+			var synonyms []string
+			for _, synonym := range got.Synonyms {
+				synonyms = append(synonyms, synonym.ObjectID)
+			}
+			assert.Equal(t, tt.wantSynonyms, synonyms)
+		})
+	}
+}