diff --git a/src/mcp/cli/cli.py b/src/mcp/cli/cli.py
index 203034c6ef..8cf36a5769 100644
--- a/src/mcp/cli/cli.py
+++ b/src/mcp/cli/cli.py
@@ -138,6 +138,7 @@ def _import_server(file: Path, server_object: str | None = None):  # pragma: no
         sys.exit(1)
 
     module = importlib.util.module_from_spec(spec)
+    sys.modules[spec.name] = module
     spec.loader.exec_module(module)
 
     def _check_server_object(server_object: Any, object_name: str):