diff --git a/projects/ngx-speculoos/src/lib/route.spec.ts b/projects/ngx-speculoos/src/lib/route.spec.ts
index 37040527..d34846bb 100644
--- a/projects/ngx-speculoos/src/lib/route.spec.ts
+++ b/projects/ngx-speculoos/src/lib/route.spec.ts
@@ -305,6 +305,19 @@ describe('routes', () => {
       expect(queryParamEmissionCount).toBe(1);
     });
 
+    it('should set a param in the map too, even if the map has already been read before', () => {
+      const route = stubRoute();
+
+      expect(route.snapshot.paramMap.get('a')).toBeNull();
+
+      const expectedParams = { a: 'a2' };
+
+      route.setParam('a', 'a2');
+
+      expect(route.snapshot.params).toEqual(expectedParams);
+      expect(route.snapshot.paramMap.get('a')).toBe('a2');
+    });
+
     it('should set a query param', () => {
       const route = stubRoute({ queryParams: { a: 'a1', b: 'b1' } });
 
@@ -316,6 +329,21 @@ describe('routes', () => {
 
       expect(route.snapshot.queryParams).toEqual(expectedQueryParams);
       expect(queryParams).toEqual(expectedQueryParams);
+      expect(route.snapshot.queryParamMap.get('a')).toBe('a2');
+      expect(route.snapshot.queryParamMap.get('b')).toBe('b1');
+    });
+
+    it('should set a query param in the map too, even if the map has already been read before', () => {
+      const route = stubRoute();
+
+      expect(route.snapshot.queryParamMap.get('a')).toBeNull();
+
+      const expectedQueryParams = { a: 'a2' };
+
+      route.setQueryParam('a', 'a2');
+
+      expect(route.snapshot.queryParams).toEqual(expectedQueryParams);
+      expect(route.snapshot.queryParamMap.get('a')).toBe('a2');
     });
 
     it('should set a datum', () => {
diff --git a/projects/ngx-speculoos/src/lib/route.ts b/projects/ngx-speculoos/src/lib/route.ts
index 7dc1d48a..0bde618a 100644
--- a/projects/ngx-speculoos/src/lib/route.ts
+++ b/projects/ngx-speculoos/src/lib/route.ts
@@ -1,4 +1,4 @@
-import { ActivatedRoute, ActivatedRouteSnapshot, convertToParamMap, Data, Params, Route, UrlSegment } from '@angular/router';
+import { ActivatedRoute, ActivatedRouteSnapshot, convertToParamMap, Data, ParamMap, Params, Route, UrlSegment } from '@angular/router';
 import { BehaviorSubject, map, Observable } from 'rxjs';
 import { Type } from '@angular/core';
 
@@ -243,6 +243,14 @@ class ActivatedRouteSnapshotStub extends ActivatedRouteSnapshot {
     this._routeConfig = route;
   }
 
+  get paramMap(): ParamMap {
+    return convertToParamMap(this.params);
+  }
+
+  get queryParamMap(): ParamMap {
+    return convertToParamMap(this.queryParams);
+  }
+
   constructor() {
     super();
     this._root = this;
@@ -262,6 +270,8 @@ class ActivatedRouteSnapshotStub extends ActivatedRouteSnapshot {
  * - when changing the params, query params, fragment, etc., their associated observable emits unconditionally, instead of
  *   first checking if the value is actually different from before. It's thus the responsibility of the tester to not
  *   change the values if they're the same as before.
+ * - the params, paramMap, queryParams and queryParamMap objects of the route snapshot change when params or query params are set
+ *   on the stub route. So if the code keeps a reference to params or paramMaps, it won't see the changes.
  */
 export class ActivatedRouteStub extends ActivatedRoute {
   private _firstChild: ActivatedRouteStub | null;