diff --git a/docs/releases/v2.5.6.md b/docs/releases/v2.5.6.md
new file mode 100644
index 0000000000000000000000000000000000000000..bcf4e62bba7707112fd3fcd5e42b63670de75771
--- /dev/null
+++ b/docs/releases/v2.5.6.md
@@ -0,0 +1,5 @@
+# v2.5.6
+
+## Feature
+
+- Add menu to change perspective orientation by coronal/sagittal/axial views.
\ No newline at end of file
diff --git a/mkdocs.yml b/mkdocs.yml
index f518f97c0be45a63b2ca5579a32b335108810fd3..896264a35008a823b6baa91c834161f92bfd49bb 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -40,6 +40,7 @@ pages:
     - Fetching datasets: 'advanced/datasets.md'
     - Display non-atlas volumes: 'advanced/otherVolumes.md'
   - Release notes:
+    - v2.5.6: 'releases/v2.5.6.md'
     - v2.5.5: 'releases/v2.5.5.md'
     - v2.5.4: 'releases/v2.5.4.md'
     - v2.5.3: 'releases/v2.5.3.md'
diff --git a/package.json b/package.json
index f84133d130a8f7ee46363b06b3036ebfcf72393b..8f8a82352770350bf7ea348d73667507428e50a0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "interactive-viewer",
-  "version": "2.5.5",
+  "version": "2.5.6",
   "description": "HBP interactive atlas viewer. Integrating KG query, dataset previews & more. Based on humanbrainproject/nehuba & google/neuroglancer. Built with angular",
   "scripts": {
     "build-aot": "VERSION=`node -e 'console.log(require(\"./package.json\").version)'` ng build && node ./third_party/matomo/processMatomo.js",
diff --git a/src/viewerModule/nehuba/viewerCtrl/change-perspective-orientation/changePerspectiveOrientation.component.spec.ts b/src/viewerModule/nehuba/viewerCtrl/change-perspective-orientation/changePerspectiveOrientation.component.spec.ts
index 78767efbba98feeb765a7250bf62e5ad9780180b..48c4d290030e11728232a182bf7aa200131b8876 100644
--- a/src/viewerModule/nehuba/viewerCtrl/change-perspective-orientation/changePerspectiveOrientation.component.spec.ts
+++ b/src/viewerModule/nehuba/viewerCtrl/change-perspective-orientation/changePerspectiveOrientation.component.spec.ts
@@ -1,14 +1,23 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
 import { ChangePerspectiveOrientationComponent } from './changePerspectiveOrientation.component';
+import { MockStore, provideMockStore } from "@ngrx/store/testing"
+import { AngularMaterialModule } from 'src/sharedModules';
+import { CommonModule } from '@angular/common';
 
 describe('ChangePerspectiveOrientationComponent', () => {
   let component: ChangePerspectiveOrientationComponent;
   let fixture: ComponentFixture<ChangePerspectiveOrientationComponent>;
+  let mockStore: MockStore;
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      declarations: [ ChangePerspectiveOrientationComponent ]
+      imports: [
+        AngularMaterialModule,
+        CommonModule
+      ],
+      declarations: [ ChangePerspectiveOrientationComponent ],
+      providers: [provideMockStore()],
+
     })
     .compileComponents();
   });