diff --git a/康康Tests/SpeechDictationAvailabilityTests.swift b/康康Tests/SpeechDictationAvailabilityTests.swift
new file mode 100644
index 0000000..28cab84
--- /dev/null
+++ b/康康Tests/SpeechDictationAvailabilityTests.swift
@@ -0,0 +1,13 @@
+import Testing
+@testable import 康康
+
+struct SpeechDictationAvailabilityTests {
+    /// 模拟器冒烟:isAvailable 的探测路径(SFSpeechRecognizer 构造 + supportsOnDeviceRecognition)
+    /// 不许崩溃、不许卡死;模拟器多为 false(mic 按钮隐藏),个别 Xcode/macOS 组合为 true 也合法,
+    /// 所以只断言「可重复调用且结果稳定」,不断言具体值。
+    @Test func isAvailableProbeIsStableAndDoesNotCrash() {
+        let first = SpeechDictationService.isAvailable
+        let second = SpeechDictationService.isAvailable
+        #expect(first == second)
+    }
+}