diff --git a/packages/playwright-core/src/server/socksClientCertificatesInterceptor.ts b/packages/playwright-core/src/server/socksClientCertificatesInterceptor.ts
index cd78c11e40..c54f1069a7 100644
--- a/packages/playwright-core/src/server/socksClientCertificatesInterceptor.ts
+++ b/packages/playwright-core/src/server/socksClientCertificatesInterceptor.ts
@@ -148,7 +148,7 @@ class SocksProxyConnection {
           port: this.port,
           rejectUnauthorized: !this.socksProxy.ignoreHTTPSErrors,
           ALPNProtocols: [internalTLS.alpnProtocol || 'http/1.1'],
-          ...clientCertificatesToTLSOptions(this.socksProxy.clientCertificates, `https://${this.host}:${this.port}`),
+          ...clientCertificatesToTLSOptions(this.socksProxy.clientCertificates, new URL(`https://${this.host}:${this.port}`).origin),
         };
         if (!net.isIP(this.host))
           tlsOptions.servername = this.host;