diff --git a/packages/common/http/src/response.ts b/packages/common/http/src/response.ts
index 8ce1a92f3aa..b0693f6a6cc 100644
--- a/packages/common/http/src/response.ts
+++ b/packages/common/http/src/response.ts
@@ -226,7 +226,7 @@ export class HttpHeaderResponse extends HttpResponseBase {
     super(init);
   }
 
-  readonly type: HttpEventType.ResponseHeader = HttpEventType.ResponseHeader;
+  override readonly type: HttpEventType.ResponseHeader = HttpEventType.ResponseHeader;
 
   /**
    * Copy this `HttpHeaderResponse`, overriding its contents with the
@@ -274,7 +274,7 @@ export class HttpResponse<T> extends HttpResponseBase {
     this.body = init.body !== undefined ? init.body : null;
   }
 
-  readonly type: HttpEventType.Response = HttpEventType.Response;
+  override readonly type: HttpEventType.Response = HttpEventType.Response;
 
   clone(): HttpResponse<T>;
   clone(update: {headers?: HttpHeaders; status?: number; statusText?: string; url?: string;}):
@@ -324,7 +324,7 @@ export class HttpErrorResponse extends HttpResponseBase implements Error {
   /**
    * Errors are never okay, even when the status code is in the 2xx success range.
    */
-  readonly ok = false;
+  override readonly ok = false;
 
   constructor(init: {
     error?: any;
diff --git a/packages/common/http/test/module_spec.ts b/packages/common/http/test/module_spec.ts
index ef8a866be95..84411dba026 100644
--- a/packages/common/http/test/module_spec.ts
+++ b/packages/common/http/test/module_spec.ts
@@ -57,7 +57,7 @@ class InterceptorC extends TestInterceptor {
     super('C');
   }
 
-  intercept(req: HttpRequest<any>, delegate: HttpHandler): Observable<HttpEvent<any>> {
+  override intercept(req: HttpRequest<any>, delegate: HttpHandler): Observable<HttpEvent<any>> {
     if (req.context.get(IS_INTERCEPTOR_C_ENABLED) === true) {
       return super.intercept(req, delegate);
     }
diff --git a/packages/common/src/location/hash_location_strategy.ts b/packages/common/src/location/hash_location_strategy.ts
index 91a23684153..413e69b4a7f 100644
--- a/packages/common/src/location/hash_location_strategy.ts
+++ b/packages/common/src/location/hash_location_strategy.ts
@@ -99,7 +99,7 @@ export class HashLocationStrategy extends LocationStrategy implements OnDestroy
     this._platformLocation.back();
   }
 
-  historyGo(relativePosition: number = 0): void {
+  override historyGo(relativePosition: number = 0): void {
     this._platformLocation.historyGo?.(relativePosition);
   }
 }
diff --git a/packages/common/src/location/location_strategy.ts b/packages/common/src/location/location_strategy.ts
index 8deebd06a84..d541784cd66 100644
--- a/packages/common/src/location/location_strategy.ts
+++ b/packages/common/src/location/location_strategy.ts
@@ -173,7 +173,7 @@ export class PathLocationStrategy extends LocationStrategy implements OnDestroy
     this._platformLocation.back();
   }
 
-  historyGo(relativePosition: number = 0): void {
+  override historyGo(relativePosition: number = 0): void {
     this._platformLocation.historyGo?.(relativePosition);
   }
 }
diff --git a/packages/common/src/location/platform_location.ts b/packages/common/src/location/platform_location.ts
index 4b85a61aea4..02afc7f4912 100644
--- a/packages/common/src/location/platform_location.ts
+++ b/packages/common/src/location/platform_location.ts
@@ -193,7 +193,7 @@ export class BrowserPlatformLocation extends PlatformLocation {
     this._history.back();
   }
 
-  historyGo(relativePosition: number = 0): void {
+  override historyGo(relativePosition: number = 0): void {
     this._history.go(relativePosition);
   }