diff --git a/openapi_tester/loaders.py b/openapi_tester/loaders.py
index 47fa3547..986bb11f 100644
--- a/openapi_tester/loaders.py
+++ b/openapi_tester/loaders.py
@@ -210,7 +210,7 @@ def resolve_path(self, endpoint_path: str, method: str) -> Tuple[str, ResolverMa
 
         de_parameterized_path, resolved_path = super().resolve_path(endpoint_path=endpoint_path, method=method)
         return (
-            de_parameterized_path[len(spectacular_settings.SCHEMA_PATH_PREFIX) :],
+            de_parameterized_path[len(spectacular_settings.SCHEMA_PATH_PREFIX or "") :],
             resolved_path,
         )