diff --git a/frontend/src/app/components/manage-units-dialog/manage-units-dialog.component.spec.ts b/frontend/src/app/components/manage-units-dialog/manage-units-dialog.component.spec.ts
index 3b2791b3a0..0ba6f52435 100644
--- a/frontend/src/app/components/manage-units-dialog/manage-units-dialog.component.spec.ts
+++ b/frontend/src/app/components/manage-units-dialog/manage-units-dialog.component.spec.ts
@@ -171,6 +171,9 @@ describe('ManageUnitsDialogComponent', () => {
     (component.fg.get('unitFormArray') as FormArray)?.clear();
     mockItems.forEach((item) => addNewItem(item));
 
+    jest.spyOn(component, 'getChangedItems')
+      .mockReturnValue(mockItems);
+
     const updateUnitSpy = jest.spyOn(unitServiceMock, 'updateUnit');
     updateUnitSpy.mockReset();
     const createUnitSpy = jest.spyOn(unitServiceMock, 'createUnit');
diff --git a/frontend/src/app/components/manage-units-dialog/manage-units-dialog.component.ts b/frontend/src/app/components/manage-units-dialog/manage-units-dialog.component.ts
index cfbfea5802..f668f2ee65 100644
--- a/frontend/src/app/components/manage-units-dialog/manage-units-dialog.component.ts
+++ b/frontend/src/app/components/manage-units-dialog/manage-units-dialog.component.ts
@@ -25,7 +25,7 @@ export class ManageUnitsDialogComponent implements OnInit {
   constructor(private unitService: UnitService, private dialogRef: MatDialogRef<ManageUnitsDialogComponent>, private unitPipe: UnitTransformationPipe) {
   }
 
-  private getChangedItems() {
+  getChangedItems() {
     const itemControls = (this.fg.get('unitFormArray') as FormArray)?.controls as FormGroup<FormControlsOf<Item>>[];
     return itemControls.filter((c) => c.dirty)
       .map((c) => c.getRawValue() as Item);