diff --git a/docs/src/api/params.md b/docs/src/api/params.md
index 3e0c71cd89..d20ce3a651 100644
--- a/docs/src/api/params.md
+++ b/docs/src/api/params.md
@@ -1087,7 +1087,7 @@ When set to `"hide"`, screenshot will hide text caret. When set to `"initial"`,
 
 ## locator-get-by-test-id-test-id
 * since: v1.27
-- `testId` <[string]>
+- `testId` <[string]|[RegExp]>
 
 Id to locate the element by.
 
diff --git a/packages/playwright-core/src/client/frame.ts b/packages/playwright-core/src/client/frame.ts
index 69ea7e477d..a539828d3e 100644
--- a/packages/playwright-core/src/client/frame.ts
+++ b/packages/playwright-core/src/client/frame.ts
@@ -309,7 +309,7 @@ export class Frame extends ChannelOwner<channels.FrameChannel> implements api.Fr
     return new Locator(this, selector, options);
   }
 
-  getByTestId(testId: string): Locator {
+  getByTestId(testId: string | RegExp): Locator {
     return this.locator(getByTestIdSelector(testIdAttributeName(), testId));
   }
 
diff --git a/packages/playwright-core/src/client/locator.ts b/packages/playwright-core/src/client/locator.ts
index e13a3f7d71..999b3961ad 100644
--- a/packages/playwright-core/src/client/locator.ts
+++ b/packages/playwright-core/src/client/locator.ts
@@ -133,7 +133,7 @@ export class Locator implements api.Locator {
     return new Locator(this._frame, this._selector + ' >> ' + selector, options);
   }
 
-  getByTestId(testId: string): Locator {
+  getByTestId(testId: string | RegExp): Locator {
     return this.locator(getByTestIdSelector(testIdAttributeName(), testId));
   }
 
@@ -339,7 +339,7 @@ export class FrameLocator implements api.FrameLocator {
     return new Locator(this._frame, this._frameSelector + ' >> internal:control=enter-frame >> ' + selector, options);
   }
 
-  getByTestId(testId: string): Locator {
+  getByTestId(testId: string | RegExp): Locator {
     return this.locator(getByTestIdSelector(testIdAttributeName(), testId));
   }
 
diff --git a/packages/playwright-core/src/client/page.ts b/packages/playwright-core/src/client/page.ts
index d3eb929dcd..1dd4f79937 100644
--- a/packages/playwright-core/src/client/page.ts
+++ b/packages/playwright-core/src/client/page.ts
@@ -572,7 +572,7 @@ export class Page extends ChannelOwner<channels.PageChannel> implements api.Page
     return this.mainFrame().locator(selector, options);
   }
 
-  getByTestId(testId: string): Locator {
+  getByTestId(testId: string | RegExp): Locator {
     return this.mainFrame().getByTestId(testId);
   }
 
diff --git a/packages/playwright-core/src/utils/isomorphic/locatorUtils.ts b/packages/playwright-core/src/utils/isomorphic/locatorUtils.ts
index 3896713d0d..51b51cc410 100644
--- a/packages/playwright-core/src/utils/isomorphic/locatorUtils.ts
+++ b/packages/playwright-core/src/utils/isomorphic/locatorUtils.ts
@@ -34,7 +34,9 @@ function getByAttributeTextSelector(attrName: string, text: string | RegExp, opt
   return `internal:attr=[${attrName}=${escapeForAttributeSelector(text, options?.exact || false)}]`;
 }
 
-export function getByTestIdSelector(testIdAttributeName: string, testId: string): string {
+export function getByTestIdSelector(testIdAttributeName: string, testId: string | RegExp): string {
+  if (!isString(testId))
+    return `internal:testid=[${testIdAttributeName}=${testId}]`;
   return `internal:testid=[${testIdAttributeName}=${escapeForAttributeSelector(testId, true)}]`;
 }
 
diff --git a/packages/playwright-core/types/types.d.ts b/packages/playwright-core/types/types.d.ts
index a88b5152d4..023ed057bc 100644
--- a/packages/playwright-core/types/types.d.ts
+++ b/packages/playwright-core/types/types.d.ts
@@ -2597,7 +2597,7 @@ export interface Page {
    *
    * @param testId Id to locate the element by.
    */
-  getByTestId(testId: string): Locator;
+  getByTestId(testId: string|RegExp): Locator;
 
   /**
    * Allows locating elements that contain given text. Consider the following DOM structure:
@@ -5849,7 +5849,7 @@ export interface Frame {
    *
    * @param testId Id to locate the element by.
    */
-  getByTestId(testId: string): Locator;
+  getByTestId(testId: string|RegExp): Locator;
 
   /**
    * Allows locating elements that contain given text. Consider the following DOM structure:
@@ -10546,7 +10546,7 @@ export interface Locator {
    *
    * @param testId Id to locate the element by.
    */
-  getByTestId(testId: string): Locator;
+  getByTestId(testId: string|RegExp): Locator;
 
   /**
    * Allows locating elements that contain given text. Consider the following DOM structure:
@@ -16114,7 +16114,7 @@ export interface FrameLocator {
    *
    * @param testId Id to locate the element by.
    */
-  getByTestId(testId: string): Locator;
+  getByTestId(testId: string|RegExp): Locator;
 
   /**
    * Allows locating elements that contain given text. Consider the following DOM structure:
diff --git a/tests/page/selectors-get-by.spec.ts b/tests/page/selectors-get-by.spec.ts
index 7aae90c09c..0f310b2390 100644
--- a/tests/page/selectors-get-by.spec.ts
+++ b/tests/page/selectors-get-by.spec.ts
@@ -36,6 +36,13 @@ it('getByTestId should escape id', async ({ page }) => {
   await expect(page.getByTestId('He"llo')).toHaveText('Hello world');
 });
 
+it('getByTestId should work for regex', async ({ page }) => {
+  await page.setContent('<div><div data-testid="Hello">Hello world</div></div>');
+  await expect(page.getByTestId(/He[l]*o/)).toHaveText('Hello world');
+  await expect(page.mainFrame().getByTestId('Hello')).toHaveText('Hello world');
+  await expect(page.locator('div').getByTestId('Hello')).toHaveText('Hello world');
+});
+
 it('getByText should work', async ({ page }) => {
   await page.setContent(`<div>yo</div><div>ya</div><div>\nye  </div>`);
   expect(await page.getByText('ye').evaluate(e => e.outerHTML)).toContain('>\nye  </div>');