diff --git a/src/features/providers/sheets/forms/BaseProviderForm.tsx b/src/features/providers/sheets/forms/BaseProviderForm.tsx
index eed645a..8290634 100644
--- a/src/features/providers/sheets/forms/BaseProviderForm.tsx
+++ b/src/features/providers/sheets/forms/BaseProviderForm.tsx
@@ -9,6 +9,7 @@ import {
   IconX,
 } from '@/components/ui/icons';
 import { Collapsible } from '@/components/ui/Collapsible';
+import { Select } from '@/components/ui/Select';
 import { hasDisableAllModelsRule } from '@/components/providers/utils';
 import type {
   GeminiKeyConfig,
@@ -271,6 +272,33 @@ export function BaseProviderForm({
     return set;
   }, [form.models]);
 
+  const testModelOptions = useMemo(() => {
+    const seen = new Set<string>();
+    const names: string[] = [];
+    form.models.forEach((m) => {
+      const name = (m.name ?? '').trim();
+      if (!name || seen.has(name)) return;
+      seen.add(name);
+      names.push(name);
+    });
+    const firstName = names[0];
+    const autoLabel = firstName
+      ? t('providersPage.form.testModelAutoWith', { name: firstName })
+      : t('providersPage.form.testModelAutoEmpty');
+    const opts: Array<{ value: string; label: string }> = [
+      { value: '', label: autoLabel },
+    ];
+    names.forEach((n) => opts.push({ value: n, label: n }));
+    const tm = (form.testModel ?? '').trim();
+    if (tm && !seen.has(tm)) {
+      opts.push({
+        value: tm,
+        label: t('providersPage.form.testModelCustom', { name: tm }),
+      });
+    }
+    return opts;
+  }, [form.models, form.testModel, t]);
+
   const openDiscovery = () => {
     setDiscoveryOpen(true);
     if (!discovery.loading && !discovery.hasFetched) {
@@ -518,12 +546,13 @@ export function BaseProviderForm({
                 </span>
               ) : null}
             </label>
-            <input
+            <Select
               id={`${fid}-testModel`}
-              className={styles.input}
               value={form.testModel ?? ''}
-              onChange={(e) => updateField('testModel', e.target.value)}
+              options={testModelOptions}
+              onChange={(value) => updateField('testModel', value)}
               disabled={mutating}
+              ariaLabel={t('providersPage.form.testModel')}
             />
             {brand === 'claude' ? (
               <div className={styles.connectivityRow}>
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index e8cad36..7bc3119 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -1550,6 +1550,9 @@
       "websockets": "Enable WebSockets",
       "testModel": "Test model",
       "testModelClaudeHint": "Used for connectivity testing only; not saved",
+      "testModelAutoWith": "Auto · {{name}}",
+      "testModelAutoEmpty": "Auto (no models added yet)",
+      "testModelCustom": "{{name}} (custom)",
       "modelsSection": "Custom models",
       "addModel": "Add model",
       "headersSection": "Request headers",
diff --git a/src/i18n/locales/ru.json b/src/i18n/locales/ru.json
index 7139fd8..5d40d62 100644
--- a/src/i18n/locales/ru.json
+++ b/src/i18n/locales/ru.json
@@ -1547,6 +1547,9 @@
       "websockets": "Включить WebSockets",
       "testModel": "Тестовая модель",
       "testModelClaudeHint": "Используется только для проверки соединения; не сохраняется",
+      "testModelAutoWith": "Авто · {{name}}",
+      "testModelAutoEmpty": "Авто (модели ещё не добавлены)",
+      "testModelCustom": "{{name}} (своя)",
       "modelsSection": "Пользовательские модели",
       "addModel": "Добавить модель",
       "headersSection": "Заголовки запроса",
diff --git a/src/i18n/locales/zh-CN.json b/src/i18n/locales/zh-CN.json
index f25ca73..ec95ca0 100644
--- a/src/i18n/locales/zh-CN.json
+++ b/src/i18n/locales/zh-CN.json
@@ -1550,6 +1550,9 @@
       "websockets": "启用 WebSockets",
       "testModel": "测试模型",
       "testModelClaudeHint": "仅用于连通性测试,不会被保存",
+      "testModelAutoWith": "自动 · {{name}}",
+      "testModelAutoEmpty": "自动(尚未添加模型)",
+      "testModelCustom": "{{name}}(自定义)",
       "modelsSection": "自定义模型",
       "addModel": "添加模型",
       "headersSection": "请求头",
diff --git a/src/i18n/locales/zh-TW.json b/src/i18n/locales/zh-TW.json
index 80cccb5..fd6a7a7 100644
--- a/src/i18n/locales/zh-TW.json
+++ b/src/i18n/locales/zh-TW.json
@@ -1576,6 +1576,9 @@
       "websockets": "啟用 WebSockets",
       "testModel": "測試模型",
       "testModelClaudeHint": "僅用於連通性測試,不會被儲存",
+      "testModelAutoWith": "自動 · {{name}}",
+      "testModelAutoEmpty": "自動(尚未新增模型)",
+      "testModelCustom": "{{name}}(自訂)",
       "modelsSection": "自訂模型",
       "addModel": "新增模型",
       "headersSection": "請求標頭",