diff --git a/tests/tts/test_elevenlabs_tts.py b/tests/tts/test_elevenlabs_tts.py
new file mode 100644
index 00000000..bea61b80
--- /dev/null
+++ b/tests/tts/test_elevenlabs_tts.py
@@ -0,0 +1,43 @@
+import base64
+import sys
+from types import ModuleType, SimpleNamespace
+
+from application.tts.elevenlabs import ElevenlabsTTS
+
+
+def test_elevenlabs_text_to_speech_monkeypatched_client(monkeypatch):
+    monkeypatch.setattr(
+        "application.tts.elevenlabs.settings",
+        SimpleNamespace(ELEVENLABS_API_KEY="api-key"),
+    )
+
+    created = {}
+
+    class DummyClient:
+        def __init__(self, api_key):
+            created["api_key"] = api_key
+            self.generate_calls = []
+
+        def generate(self, *, text, model, voice):
+            self.generate_calls.append({"text": text, "model": model, "voice": voice})
+            yield b"chunk-one"
+            yield b"chunk-two"
+
+    client_module = ModuleType("elevenlabs.client")
+    client_module.ElevenLabs = DummyClient
+    package_module = ModuleType("elevenlabs")
+    package_module.client = client_module
+
+    monkeypatch.setitem(sys.modules, "elevenlabs", package_module)
+    monkeypatch.setitem(sys.modules, "elevenlabs.client", client_module)
+
+    tts = ElevenlabsTTS()
+    audio_base64, lang = tts.text_to_speech("Speak")
+
+    assert created["api_key"] == "api-key"
+    assert tts.client.generate_calls == [
+        {"text": "Speak", "model": "eleven_multilingual_v2", "voice": "Brian"}
+    ]
+    assert lang == "en"
+    assert base64.b64decode(audio_base64.encode()) == b"chunk-onechunk-two"
+
diff --git a/tests/tts/test_google_tts.py b/tests/tts/test_google_tts.py
new file mode 100644
index 00000000..ea80ab79
--- /dev/null
+++ b/tests/tts/test_google_tts.py
@@ -0,0 +1,24 @@
+import base64
+
+from application.tts.google_tts import GoogleTTS
+
+
+def test_google_tts_text_to_speech(monkeypatch):
+    captured = {}
+
+    class DummyGTTS:
+        def __init__(self, *, text, lang, slow):
+            captured["args"] = {"text": text, "lang": lang, "slow": slow}
+
+        def write_to_fp(self, fp):
+            fp.write(b"synthetic-audio")
+
+    monkeypatch.setattr("application.tts.google_tts.gTTS", DummyGTTS)
+
+    tts = GoogleTTS()
+    audio_base64, lang = tts.text_to_speech("hello world")
+
+    assert captured["args"] == {"text": "hello world", "lang": "en", "slow": False}
+    assert lang == "en"
+    assert base64.b64decode(audio_base64.encode()) == b"synthetic-audio"
+