diff --git a/tests/mcp_tests/test_semantic_tool_filter_e2e.py b/tests/mcp_tests/test_semantic_tool_filter_e2e.py
index cf951c1884..91c072ae8a 100644
--- a/tests/mcp_tests/test_semantic_tool_filter_e2e.py
+++ b/tests/mcp_tests/test_semantic_tool_filter_e2e.py
@@ -12,8 +12,19 @@ sys.path.insert(0, os.path.abspath("../.."))
 
 from mcp.types import Tool as MCPTool
 
+# Check if semantic-router is available
+try:
+    import semantic_router
+    SEMANTIC_ROUTER_AVAILABLE = True
+except ImportError:
+    SEMANTIC_ROUTER_AVAILABLE = False
+
 
 @pytest.mark.asyncio
+@pytest.mark.skipif(
+    not SEMANTIC_ROUTER_AVAILABLE,
+    reason="semantic-router not installed. Install with: pip install 'litellm[semantic-router]'"
+)
 async def test_e2e_semantic_filter():
     """E2E: Load router/filter and verify hook filters tools."""
     from litellm import Router
@@ -37,8 +48,6 @@ async def test_e2e_semantic_filter():
         enabled=True,
     )
     
-    hook = SemanticToolFilterHook(filter_instance)
-    
     # Create 10 tools
     tools = [
         MCPTool(name="gmail_send", description="Send an email via Gmail", inputSchema={"type": "object"}),
@@ -53,10 +62,16 @@ async def test_e2e_semantic_filter():
         MCPTool(name="note_add", description="Add note", inputSchema={"type": "object"}),
     ]
     
+    # Build router with test tools
+    filter_instance._build_router(tools)
+    
+    hook = SemanticToolFilterHook(filter_instance)
+    
     data = {
         "model": "gpt-4",
         "messages": [{"role": "user", "content": "Send an email and create a calendar event"}],
         "tools": tools,
+        "metadata": {},  # Initialize metadata dict for hook to store filter stats
     }
     
     # Call hook
diff --git a/tests/test_litellm/proxy/_experimental/mcp_server/test_semantic_tool_filter.py b/tests/test_litellm/proxy/_experimental/mcp_server/test_semantic_tool_filter.py
index 8d35f5bbdc..87c597c659 100644
--- a/tests/test_litellm/proxy/_experimental/mcp_server/test_semantic_tool_filter.py
+++ b/tests/test_litellm/proxy/_experimental/mcp_server/test_semantic_tool_filter.py
@@ -71,6 +71,9 @@ async def test_semantic_filter_basic_filtering():
         enabled=True,
     )
     
+    # Build router with the tools before filtering
+    filter_instance._build_router(tools)
+    
     # Filter tools with email-related query
     filtered = await filter_instance.filter_tools(
         query="send an email to john@example.com",
@@ -139,6 +142,9 @@ async def test_semantic_filter_top_k_limiting():
         enabled=True,
     )
     
+    # Build router with the tools before filtering
+    filter_instance._build_router(tools)
+    
     # Filter tools
     filtered = await filter_instance.filter_tools(
         query="test query",
@@ -297,21 +303,25 @@ async def test_semantic_filter_hook_triggers_on_completion():
         enabled=True,
     )
     
-    # Create hook
-    hook = SemanticToolFilterHook(filter_instance)
-    
     # Prepare data - completion request with tools
     tools = [
         MCPTool(name=f"tool_{i}", description=f"Tool {i}", inputSchema={"type": "object"})
         for i in range(10)
     ]
     
+    # Build router with the tools before filtering
+    filter_instance._build_router(tools)
+    
+    # Create hook
+    hook = SemanticToolFilterHook(filter_instance)
+    
     data = {
         "model": "gpt-4",
         "messages": [
             {"role": "user", "content": "Send an email"}
         ],
         "tools": tools,
+        "metadata": {},  # Hook needs metadata field to store filter stats
     }
     
     # Mock user API key dict and cache