diff --git a/src/mock-manager.ts b/src/mock-manager.ts
index 2d7acb5..9708c1d 100644
--- a/src/mock-manager.ts
+++ b/src/mock-manager.ts
@@ -44,7 +44,7 @@ export class MockManager {
         );
         return this;
       }
-      this.provider.requestMocks[method].filter(
+      this.provider.requestMocks[method] = this.provider.requestMocks[method].filter(
         (mock) => mock !== currentUnconditionalPersistentMock
       );
     }