diff --git a/src/core/filters/demo.filter.spec.ts b/src/core/filters/demo.filter.spec.ts
new file mode 100644
index 0000000..2341e9f
--- /dev/null
+++ b/src/core/filters/demo.filter.spec.ts
@@ -0,0 +1,7 @@
+import { DemoFilter } from './demo.filter';
+
+describe('DemoFilter', () => {
+  it('should be defined', () => {
+    expect(new DemoFilter()).toBeDefined();
+  });
+});
diff --git a/src/core/filters/demo.filter.ts b/src/core/filters/demo.filter.ts
new file mode 100644
index 0000000..85beef8
--- /dev/null
+++ b/src/core/filters/demo.filter.ts
@@ -0,0 +1,6 @@
+import { ArgumentsHost, Catch, ExceptionFilter } from '@nestjs/common';
+
+@Catch()
+export class DemoFilter<T> implements ExceptionFilter {
+  catch(exception: T, host: ArgumentsHost) {}
+}