diff --git a/lib/testing/src/lib/protractor/core/pages/material/material-locators.ts b/lib/testing/src/lib/protractor/core/pages/material/material-locators.ts
index 820cced622..29ff6dd774 100644
--- a/lib/testing/src/lib/protractor/core/pages/material/material-locators.ts
+++ b/lib/testing/src/lib/protractor/core/pages/material/material-locators.ts
@@ -385,10 +385,10 @@ export const materialLocators = {
       content: '.mat-mdc-tab-body-content'
     },
     label: {
-      class: '.mat-mdc-tab-label',
+      class: '.mdc-tab',
       root: 'mat-tab-label',
       active: {
-        class: '.mat-mdc-tab-label-active',
+        class: '.mdc-tab--active',
         root: 'mat-tab-label-active'
       },
       content: {
@@ -397,7 +397,10 @@ export const materialLocators = {
       }
     },
     labels: {
-      class: '.mdc-tab__text-label'
+      class: '.mdc-tab__text-label',
+      container: {
+        class: '.mat-mdc-tab-labels'
+      }
     },
     list: '.mat-mdc-tab-list'
   },
diff --git a/lib/testing/src/lib/protractor/core/pages/viewer.page.ts b/lib/testing/src/lib/protractor/core/pages/viewer.page.ts
index 106360d2d1..4c04bc31ff 100644
--- a/lib/testing/src/lib/protractor/core/pages/viewer.page.ts
+++ b/lib/testing/src/lib/protractor/core/pages/viewer.page.ts
@@ -253,7 +253,7 @@ export class ViewerPage {
     }
 
     async checkTabIsActive(tabName: string): Promise<void> {
-        const materialLocatorPart = `div${materialLocators.Tab.labels.class} div${materialLocators.Tab.label.active.class} ${materialLocators.Tab.label.content.class}`;
+        const materialLocatorPart = `div${materialLocators.Tab.labels.container.class} div${materialLocators.Tab.label.active.class} ${materialLocators.Tab.label.content.class}`;
         const tab = element(
             by.cssContainingText(`.adf-info-drawer-layout-content ${materialLocatorPart}`, tabName)
         );