diff --git a/tests/test_random_prompt.py b/tests/test_random_prompt.py
new file mode 100644
index 0000000..5080db5
--- /dev/null
+++ b/tests/test_random_prompt.py
@@ -0,0 +1,70 @@
+# -*- coding: utf-8 -*-
+# @Time    : 2024/1/27 上午10:41
+# @Author  : sudoskys
+# @File    : test_random_prompt.py
+# @Software: PyCharm
+
+from src.novelai_python.utils.random_prompt import RandomPromptGenerator
+
+
+def test_generate_returns_string():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result = generator.generate()
+    assert isinstance(result, str)
+
+
+def test_generate_returns_non_empty_string():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result = generator.generate()
+    assert len(result) > 0
+
+
+def test_generate_returns_different_results():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result1 = generator.generate()
+    result2 = generator.generate()
+    assert result1 != result2
+
+
+def test_generate_with_nsfw_disabled():
+    generator = RandomPromptGenerator(nsfw_enabled=False)
+    result = generator.generate()
+    assert 'nsfw' not in result
+
+
+def test_generate_with_nsfw_enabled():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result = generator.generate()
+    assert 'nsfw' in result
+
+
+def test_get_weighted_choice_returns_string():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result = generator.get_weighted_choice([['tag1', 1], ['tag2', 2]], [])
+    assert isinstance(result, str)
+
+
+def test_get_weighted_choice_returns_valid_tag():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result = generator.get_weighted_choice([['tag1', 1], ['tag2', 2]], [])
+    assert result in ['tag1', 'tag2']
+
+
+def test_character_features_returns_list():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result = generator.character_features('m', 'front', True, 1)
+    assert isinstance(result, list)
+
+
+def test_character_features_returns_non_empty_list():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result = generator.character_features('m', 'front', True, 1)
+    assert len(result) > 0
+
+
+def test_character_features_with_different_genders():
+    generator = RandomPromptGenerator(nsfw_enabled=True)
+    result_m = generator.character_features('m', 'front', True, 1)
+    result_f = generator.character_features('f', 'front', True, 1)
+    result_o = generator.character_features('o', 'front', True, 1)
+    assert result_m != result_f != result_o
diff --git a/tests/test_server_run.py b/tests/test_server_run.py
new file mode 100644
index 0000000..dc6d885
--- /dev/null
+++ b/tests/test_server_run.py
@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+# @Time    : 2024/1/30 下午11:52
+# @Author  : sudoskys
+# @File    : test_server_run.py
+# @Software: PyCharm
+from fastapi.testclient import TestClient
+
+from src.novelai_python.sdk.ai.generate_image import GenerateImageInfer
+from src.novelai_python.server import app, get_session
+
+client = TestClient(app)
+
+
+def test_health_check():
+    response = client.get("/health")
+    assert response.status_code == 200
+    assert response.json() == {"status": "ok"}
+
+
+def test_generate_image_with_valid_token():
+    valid_token = "valid_token"
+    get_session(valid_token)  # to simulate a valid session
+    response = client.post(
+        "/ai/generate_image",
+        headers={"Authorization": valid_token},
+        json=GenerateImageInfer(input="1girl").model_dump()
+    )
+    assert response.status_code == 500