diff --git a/packages/protocol/src/callMetadata.ts b/packages/protocol/src/callMetadata.d.ts
similarity index 100%
rename from packages/protocol/src/callMetadata.ts
rename to packages/protocol/src/callMetadata.d.ts
diff --git a/packages/protocol/src/channels.ts b/packages/protocol/src/channels.d.ts
similarity index 100%
rename from packages/protocol/src/channels.ts
rename to packages/protocol/src/channels.d.ts
diff --git a/utils/generate_channels.js b/utils/generate_channels.js
index 9da221f97e7ad..0bebcbba0cbc7 100755
--- a/utils/generate_channels.js
+++ b/utils/generate_channels.js
@@ -362,7 +362,7 @@ function writeFile(filePath, content) {
   fs.writeFileSync(filePath, content, 'utf8');
 }
 
-writeFile(path.join(__dirname, '..', 'packages', 'protocol', 'src', 'channels.ts'), channels_ts.join('\n'));
+writeFile(path.join(__dirname, '..', 'packages', 'protocol', 'src', 'channels.d.ts'), channels_ts.join('\n'));
 writeFile(path.join(__dirname, '..', 'packages', 'playwright-core', 'src', 'protocol', 'debug.ts'), debug_ts.join('\n'));
 writeFile(path.join(__dirname, '..', 'packages', 'playwright-core', 'src', 'protocol', 'validator.ts'), validator_ts.join('\n'));
 process.exit(hasChanges ? 1 : 0);