diff --git a/packages/playwright-core/src/protocol/validator.ts b/packages/playwright-core/src/protocol/validator.ts
index 0ccc146698..85f349c5fe 100644
--- a/packages/playwright-core/src/protocol/validator.ts
+++ b/packages/playwright-core/src/protocol/validator.ts
@@ -1586,7 +1586,6 @@ scheme.FrameExpectParams = tObject({
   expectedText: tOptional(tArray(tType('ExpectedTextValue'))),
   expectedNumber: tOptional(tNumber),
   expectedValue: tOptional(tType('SerializedArgument')),
-  viewportRatio: tOptional(tNumber),
   useInnerText: tOptional(tBoolean),
   isNot: tBoolean,
   timeout: tOptional(tNumber),
diff --git a/packages/playwright-core/src/server/injected/injectedScript.ts b/packages/playwright-core/src/server/injected/injectedScript.ts
index e8bd7bb003..9c6dabb652 100644
--- a/packages/playwright-core/src/server/injected/injectedScript.ts
+++ b/packages/playwright-core/src/server/injected/injectedScript.ts
@@ -1191,7 +1191,7 @@ export class InjectedScript {
       // Viewport intersection
       if (expression === 'to.be.in.viewport') {
         const ratio = await this.viewportRatio(element);
-        return { received: `viewport ratio ${ratio}`, matches: ratio > 0 && ratio > (options.viewportRatio ?? 0) - 1e-9 };
+        return { received: `viewport ratio ${ratio}`, matches: ratio > 0 && ratio > (options.expectedNumber ?? 0) - 1e-9 };
       }
     }
 
diff --git a/packages/playwright-test/src/matchers/matchers.ts b/packages/playwright-test/src/matchers/matchers.ts
index 9337b12d44..9d80a038b7 100644
--- a/packages/playwright-test/src/matchers/matchers.ts
+++ b/packages/playwright-test/src/matchers/matchers.ts
@@ -125,7 +125,7 @@ export function toBeInViewport(
   options?: { timeout?: number, ratio?: number },
 ) {
   return toBeTruthy.call(this, 'toBeInViewport', locator, 'Locator', async (isNot, timeout, customStackTrace) => {
-    return await locator._expect(customStackTrace, 'to.be.in.viewport', { isNot, viewportRatio: options?.ratio, timeout });
+    return await locator._expect(customStackTrace, 'to.be.in.viewport', { isNot, expectedNumber: options?.ratio, timeout });
   }, options);
 }
 
diff --git a/packages/protocol/src/channels.ts b/packages/protocol/src/channels.ts
index cb6f9e8ce9..3e75809e84 100644
--- a/packages/protocol/src/channels.ts
+++ b/packages/protocol/src/channels.ts
@@ -2844,7 +2844,6 @@ export type FrameExpectParams = {
   expectedText?: ExpectedTextValue[],
   expectedNumber?: number,
   expectedValue?: SerializedArgument,
-  viewportRatio?: number,
   useInnerText?: boolean,
   isNot: boolean,
   timeout?: number,
@@ -2854,7 +2853,6 @@ export type FrameExpectOptions = {
   expectedText?: ExpectedTextValue[],
   expectedNumber?: number,
   expectedValue?: SerializedArgument,
-  viewportRatio?: number,
   useInnerText?: boolean,
   timeout?: number,
 };
diff --git a/packages/protocol/src/protocol.yml b/packages/protocol/src/protocol.yml
index 34d2bc1f1b..0551af5876 100644
--- a/packages/protocol/src/protocol.yml
+++ b/packages/protocol/src/protocol.yml
@@ -2144,7 +2144,6 @@ Frame:
           items: ExpectedTextValue
         expectedNumber: number?
         expectedValue: SerializedArgument?
-        viewportRatio: number?
         useInnerText: boolean?
         isNot: boolean
         timeout: number?