diff --git a/core/core-decorator/test/fixtures/decators/ChildService.ts b/core/core-decorator/test/fixtures/decators/ChildService.ts
index 3dbe1571..22550a3b 100644
--- a/core/core-decorator/test/fixtures/decators/ChildService.ts
+++ b/core/core-decorator/test/fixtures/decators/ChildService.ts
@@ -11,7 +11,7 @@ export class ChildSingletonProto extends ParentSingletonProto {}
 })
 export class ParentStaticMultiInstanceProto {}
 
-export class ChildStaticMultiInstanceProto extends ParentSingletonProto {}
+export class ChildStaticMultiInstanceProto extends ParentStaticMultiInstanceProto {}
 
 
 @MultiInstanceProto({
diff --git a/core/metadata/index.ts b/core/metadata/index.ts
index 021781ed..8834354b 100644
--- a/core/metadata/index.ts
+++ b/core/metadata/index.ts
@@ -17,6 +17,7 @@ export * from './src/model/graph/ProtoSelector';
 export * from './src/model/ProtoDescriptor/AbstractProtoDescriptor';
 export * from './src/model/ProtoDescriptor/ClassProtoDescriptor';
 export * from './src/model/ModuleDescriptor';
+export * from './src/model/ProtoDescriptorHelper';
 
 import './src/impl/ModuleLoadUnit';
 import './src/impl/EggPrototypeBuilder';