diff --git a/packages/open-scd/src/addons/Settings.ts b/packages/open-scd/src/addons/Settings.ts
index 53e6dfdacb..972c87b242 100644
--- a/packages/open-scd/src/addons/Settings.ts
+++ b/packages/open-scd/src/addons/Settings.ts
@@ -89,6 +89,12 @@ export function newLoadNsdocEvent(
 
 @customElement('oscd-settings')
 export class OscdSettings extends LitElement {
+  /** Object containing all *.nsdoc files and a function extracting element's label form them*/
+  @property({
+    type: Object,
+  })
+  nsdoc!: Nsdoc;
+
   /** Current [[`Settings`]] in `localStorage`, default to [[`defaults`]]. */
   @property()
   get settings(): Settings {
@@ -103,9 +109,6 @@ export class OscdSettings extends LitElement {
       'IEC 61850-8-1': this.getSetting('IEC 61850-8-1'),
     };
   }
-  /** Object containing all *.nsdoc files and a function extracting element's label form them*/
-  @property({ attribute: false })
-  nsdoc: Nsdoc = initializeNsdoc();
 
   @property({
     type: Object,
diff --git a/packages/open-scd/test/mock-open-scd.ts b/packages/open-scd/test/mock-open-scd.ts
index 98fe4982d5..b92069d61b 100644
--- a/packages/open-scd/test/mock-open-scd.ts
+++ b/packages/open-scd/test/mock-open-scd.ts
@@ -13,7 +13,7 @@ import { WizardDialog } from '../src/wizard-dialog.js';
 @customElement('mock-open-scd')
 export class MockOpenSCD extends OpenSCD {
   @queryAssignedNodes()
-  _plugins!: Array<HTMLElement>;
+  _slots!: Array<HTMLElement>;
 
   @query('oscd-wizards')
   wizards!: Wizards;
@@ -23,13 +23,13 @@ export class MockOpenSCD extends OpenSCD {
   }
 
   getPlugin<T extends HTMLElement>(name: string): T | undefined {
-    return this._plugins.find(
-      p => p.tagName.toLowerCase() === name.toLowerCase()
+    return this._slots.find(
+      s => s.tagName.toLowerCase() === name.toLowerCase()
     ) as T | undefined;
   }
 
   getActivePlugin<T extends HTMLElement>(): T {
-    return this._plugins[0]! as T;
+    return this._slots[0]! as T;
   }
 
   get wizardUI(): WizardDialog {
diff --git a/packages/open-scd/test/unit/Plugging.test.ts b/packages/open-scd/test/unit/Plugging.test.ts
index f9c69fb370..9ec98c0580 100644
--- a/packages/open-scd/test/unit/Plugging.test.ts
+++ b/packages/open-scd/test/unit/Plugging.test.ts
@@ -58,6 +58,7 @@ describe('OpenSCD-Plugin', () => {
       primaryAction = <HTMLElement>(
         element.pluginUI.querySelector('mwc-button[slot="primaryAction"]')
       );
+      await element.updateComplete;
     });
 
     it('disables deselected plugins', async () => {
@@ -152,9 +153,14 @@ describe('OpenSCD-Plugin', () => {
       await src.updateComplete;
       await name.updateComplete;
       primaryAction.click();
+      await new Promise(resolve => setTimeout(resolve, 50)); // await animation
+
+      await element.requestUpdate();
       await element.updateComplete;
+
       expect(element.editors).to.have.lengthOf(7);
     });
+
     it('adds a new menu kind plugin on add button click', async () => {
       const lengthMenuKindPlugins = element.menuEntries.length;
       src.value = 'http://example.com/plugin.js';