diff --git a/src/app/modules/devices/device-instances/device-instances.component.ts b/src/app/modules/devices/device-instances/device-instances.component.ts
index 398ea73c..c8274af1 100644
--- a/src/app/modules/devices/device-instances/device-instances.component.ts
+++ b/src/app/modules/devices/device-instances/device-instances.component.ts
@@ -36,6 +36,8 @@ import { SelectionModel } from '@angular/cdk/collections';
 import { MatPaginator } from '@angular/material/paginator';
 import { forkJoin, Observable, map, Subscription, of } from 'rxjs';
 import { SearchbarService } from 'src/app/core/components/searchbar/shared/searchbar.service';
+import { DeviceInstancesFilterDialogComponent } from './dialogs/device-instances-filter-dialog/device-instances-filter-dialog.component';
+import { MatDialog } from '@angular/material/dialog';
 
 export interface DeviceInstancesRouterState {
     type: DeviceInstancesRouterStateTypesEnum | undefined | null;
@@ -72,10 +74,9 @@ export class DeviceInstancesComponent implements OnInit, AfterViewInit {
         private snackBar: MatSnackBar,
         private permissionsDialogService: PermissionsDialogService,
         private dialogsService: DialogsService,
-        private locationsService: LocationsService,
-        private networksService: NetworksService,
         private deviceTypesService: DeviceTypeService,
-        private searchbarService: SearchbarService
+        private searchbarService: SearchbarService,
+        private dialog: MatDialog
     ) {
         this.getRouterParams();
     }
@@ -181,7 +182,10 @@ export class DeviceInstancesComponent implements OnInit, AfterViewInit {
             location: this.routerLocation
         }
 
-        this.deviceInstancesService.openFilterDialog(filterSelection).subscribe({
+        const editDialogRef = this.dialog.open(DeviceInstancesFilterDialogComponent, {
+            data: filterSelection
+        });
+        editDialogRef.afterClosed().subscribe({
             next: (filterSelection: FilterSelection) => {
                 if(filterSelection != null) {
                     this.routerConnectionState = filterSelection.connectionState
diff --git a/src/app/modules/devices/device-instances/dialogs/device-instances-filter-dialog/device-instances-filter-dialog.component.spec.ts b/src/app/modules/devices/device-instances/dialogs/device-instances-filter-dialog/device-instances-filter-dialog.component.spec.ts
index b356362e..1a77ba9a 100644
--- a/src/app/modules/devices/device-instances/dialogs/device-instances-filter-dialog/device-instances-filter-dialog.component.spec.ts
+++ b/src/app/modules/devices/device-instances/dialogs/device-instances-filter-dialog/device-instances-filter-dialog.component.spec.ts
@@ -1,14 +1,34 @@
+import { HttpClientTestingModule } from '@angular/common/http/testing';
 import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { MatDialogModule, MatDialogRef, MAT_DIALOG_DATA } from '@angular/material/dialog';
+import { MatSnackBarModule } from '@angular/material/snack-bar';
+import { createSpyFromClass, Spy } from 'jasmine-auto-spies';
+import { of } from 'rxjs';
+import { DeviceInstancesService } from '../../shared/device-instances.service';
 
 import { DeviceInstancesFilterDialogComponent } from './device-instances-filter-dialog.component';
 
 describe('DeviceInstancesFilterDialogComponent', () => {
   let component: DeviceInstancesFilterDialogComponent;
   let fixture: ComponentFixture<DeviceInstancesFilterDialogComponent>;
+  const deviceInstanceServiceSpy: Spy<DeviceInstancesService> = createSpyFromClass(DeviceInstancesService);
+  deviceInstanceServiceSpy.listUsedDeviceTypeIds.and.returnValue(of(["id"]))
+  const matDialogRefSpy: Spy<MatDialogRef<DeviceInstancesFilterDialogComponent>> =
+  createSpyFromClass<MatDialogRef<DeviceInstancesFilterDialogComponent>>(MatDialogRef);
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      declarations: [ DeviceInstancesFilterDialogComponent ]
+      declarations: [ DeviceInstancesFilterDialogComponent ],
+      imports: [HttpClientTestingModule, MatSnackBarModule, MatDialogModule],
+      providers: [
+        { provide: DeviceInstancesService, useValue: deviceInstanceServiceSpy },
+        { provide: MatDialogRef, useValue: matDialogRefSpy },
+        {
+          provide: MAT_DIALOG_DATA,
+          useValue: {
+          },
+      },
+      ]
     })
     .compileComponents();
 
diff --git a/src/app/modules/devices/device-instances/shared/device-instances.service.ts b/src/app/modules/devices/device-instances/shared/device-instances.service.ts
index 65b5c2e4..f5fcb4b9 100644
--- a/src/app/modules/devices/device-instances/shared/device-instances.service.ts
+++ b/src/app/modules/devices/device-instances/shared/device-instances.service.ts
@@ -38,8 +38,6 @@ import { DeviceTypePermSearchModel } from 'src/app/modules/metadata/device-types
 import { PermissionQueryRequest, Selection } from 'src/app/core/model/permissions/permissions';
 import { LocationsService } from '../../locations/shared/locations.service';
 import { NetworksService } from '../../networks/shared/networks.service';
-import { MatDialog, MatDialogConfig } from '@angular/material/dialog';
-import { DeviceInstancesFilterDialogComponent } from '../dialogs/device-instances-filter-dialog/device-instances-filter-dialog.component';
 
 @Injectable({
     providedIn: 'root',
@@ -57,19 +55,10 @@ export class DeviceInstancesService {
         private utilService: UtilService,
         private locationService: LocationsService,
         private networkService: NetworksService,
-        private dialog: MatDialog
     ) {
         this.authorizations = this.ladonService.getUserAuthorizationsForURI(environment.deviceManagerUrl)
     }
 
-    openFilterDialog(filterSelection: FilterSelection | undefined): Observable<FilterSelection> {
-        const editDialogRef = this.dialog.open(DeviceInstancesFilterDialogComponent, {
-            data: filterSelection
-        });
-
-        return editDialogRef.afterClosed()
-    }
-
     listUsedDeviceTypeIds(): Observable<string[]> {
         return this.http
             .post<{ term: string }[]>(environment.permissionSearchUrl + '/v3/query/devices', {