diff --git a/py/tests/unit/conftest.py b/py/tests/unit/conftest.py
index a9d1b2e81..3ecae670e 100644
--- a/py/tests/unit/conftest.py
+++ b/py/tests/unit/conftest.py
@@ -3,6 +3,7 @@ import os
 import json
 from datetime import datetime
 import uuid
+import yaml
 
 import pytest
 
@@ -749,10 +750,26 @@ class MockPostgresPromptsHandler:
         return list(self.prompts.values())
     
     async def load_prompts_from_yaml(self, yaml_content):
-        """Load prompts from a YAML string."""
-        # Just a stub for testing
-        pass
-        
+        """Load prompts from YAML content."""
+        try:
+            data = yaml.safe_load(yaml_content)
+            if not data or "prompts" not in data:
+                return
+                
+            for prompt_data in data["prompts"]:
+                name = prompt_data.get("name")
+                template = prompt_data.get("template")
+                input_types = prompt_data.get("input_types", {})
+                
+                if name and template:
+                    await self.add_prompt(
+                        name=name,
+                        template=template,
+                        input_types=input_types,
+                    )
+        except Exception as e:
+            raise ValueError(f"Failed to load prompts from YAML: {str(e)}")
+    
     async def get_cached_prompt(self, prompt_name, inputs=None, bypass_cache=False):
         """Get a formatted prompt, using cache if available."""
         if inputs is None: