diff --git a/src/cdk/testing/selenium-webdriver/selenium-web-driver-element.ts b/src/cdk/testing/selenium-webdriver/selenium-web-driver-element.ts
index 7529384c45d1..588a888ed61c 100644
--- a/src/cdk/testing/selenium-webdriver/selenium-web-driver-element.ts
+++ b/src/cdk/testing/selenium-webdriver/selenium-web-driver-element.ts
@@ -245,11 +245,7 @@ export class SeleniumWebDriverElement implements TestElement {
   async matchesSelector(selector: string): Promise<boolean> {
     await this._stabilize();
     return this._executeScript(
-      (element: Element, s: string) =>
-        (Element.prototype.matches || (Element.prototype as any).msMatchesSelector).call(
-          element,
-          s,
-        ),
+      (element: Element, s: string) => element.matches(s),
       this.element(),
       selector,
     );
diff --git a/src/cdk/testing/testbed/unit-test-element.ts b/src/cdk/testing/testbed/unit-test-element.ts
index 9edb55433497..b4f6227b5fba 100644
--- a/src/cdk/testing/testbed/unit-test-element.ts
+++ b/src/cdk/testing/testbed/unit-test-element.ts
@@ -266,11 +266,7 @@ export class UnitTestElement implements TestElement {
   /** Checks whether this element matches the given selector. */
   async matchesSelector(selector: string): Promise<boolean> {
     await this._stabilize();
-    const elementPrototype = Element.prototype as any;
-    return (elementPrototype['matches'] || elementPrototype['msMatchesSelector']).call(
-      this.element,
-      selector,
-    );
+    return this.element.matches(selector);
   }
 
   /** Checks whether the element is focused. */