diff --git a/src/material-experimental/mdc-slider/testing/slider-harness.spec.ts b/src/material-experimental/mdc-slider/testing/slider-harness.spec.ts
index 0ce5d5e99178..c2219c0e2ca1 100644
--- a/src/material-experimental/mdc-slider/testing/slider-harness.spec.ts
+++ b/src/material-experimental/mdc-slider/testing/slider-harness.spec.ts
@@ -145,11 +145,6 @@ describe('MDC-based MatSliderHarness', () => {
expect(await (await slider.getStartThumb()).getId()).toBe('price-input');
});
- it('should get whether a slider thumb is required', async () => {
- const slider = await loader.getHarness(MatSliderHarness);
- expect(await (await slider.getStartThumb()).isRequired()).toBe(true);
- });
-
it('should be able to focus and blur a slider thumb', async () => {
const slider = await loader.getHarness(MatSliderHarness);
const thumb = await slider.getStartThumb();
@@ -169,7 +164,6 @@ describe('MDC-based MatSliderHarness', () => {
diff --git a/src/material-experimental/mdc-slider/testing/slider-thumb-harness.ts b/src/material-experimental/mdc-slider/testing/slider-thumb-harness.ts
index cc99a58330f5..ca36e6b02ab3 100644
--- a/src/material-experimental/mdc-slider/testing/slider-thumb-harness.ts
+++ b/src/material-experimental/mdc-slider/testing/slider-thumb-harness.ts
@@ -82,11 +82,6 @@ export class MatSliderThumbHarness extends ComponentHarness {
return (await this.host()).getProperty('disabled');
}
- /** Whether the thumb is required. */
- async isRequired(): Promise {
- return (await this.host()).getProperty('required');
- }
-
/** Gets the name of the thumb. */
async getName(): Promise {
return (await (await this.host()).getProperty('name'));