diff --git a/mcp/engine/anthropic.py b/mcp/engine/anthropic.py
index 035ec6c..81898b3 100644
--- a/mcp/engine/anthropic.py
+++ b/mcp/engine/anthropic.py
@@ -1,5 +1,4 @@
 from typing import Any, Union, Dict, List, Optional
-from anthropic import Anthropic
 import os
 
 from . import MCPEngine
@@ -14,6 +13,7 @@ def __init__(self,
         self.api_key = api_key or os.environ.get("ANTHROPIC_API_KEY")
         if not isinstance(self.api_key, str) or len(self.api_key) < 51:
             raise Exception("Anthropic needs api_key (ANTHROPIC_API_KEY)")
+        from anthropic import Anthropic
         self.client = Anthropic(api_key=self.api_key)
         self.max_tokens = max_tokens or MCPEngineAnthropic.default_max_tokens
 
diff --git a/mcp/engine/groq.py b/mcp/engine/groq.py
index e301e71..293faa5 100644
--- a/mcp/engine/groq.py
+++ b/mcp/engine/groq.py
@@ -1,5 +1,4 @@
 from typing import Any, Union, Dict, List, Optional
-from groq import Groq
 import os
 
 from . import MCPEngine
@@ -12,6 +11,7 @@ def __init__(self,
         self.api_key = api_key or os.environ.get("GROQ_API_KEY")
         if not isinstance(self.api_key, str) or len(self.api_key) < 51:
             raise Exception("Groq needs api_key (GROQ_API_KEY)")
+        from groq import Groq
         self.client = Groq(api_key=self.api_key)
 
     def update_models(self):
diff --git a/mcp/engine/openai.py b/mcp/engine/openai.py
index 3e46060..ba66965 100644
--- a/mcp/engine/openai.py
+++ b/mcp/engine/openai.py
@@ -1,5 +1,4 @@
 from typing import Any, Union, Dict, List, Optional
-from openai import OpenAI
 import os
 
 from . import MCPEngine
@@ -12,6 +11,7 @@ def __init__(self,
         self.api_key = api_key or os.environ.get("OPENAI_API_KEY")
         if not isinstance(self.api_key, str) or len(self.api_key) < 51:
             raise Exception("OpenAI needs api_key (OPENAI_API_KEY)")
+        from openai import OpenAI
         self.client = OpenAI(api_key=self.api_key)
 
     def update_models(self):
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..d0a38ff
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,5 @@
+import sys
+import os
+
+# Add the library's root directory to sys.path
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))