Beijing-based cloud testing firm Testin claims to have completed a US$30 million series C funding round.

The news is being reported by local Chinese media, but the identity of the cloud computing investor is cloudy and is currently undisclosed.

Testin provides one-stop cloud testing services to mobile app and games developers and was founded in 2011. The company Testin previously received series A funding from IDG Capital Partners.

In 2014 to 2015, it raised a series B financing round from IDG and Banyan Capital, and a series B+ round led by Haiyin Venture Partners, with participation from existing investors Banyan and IDG, in 2015.

The series B and B+ round totaled US$54.9 million, say the reports.

Testin provides real terminal-based, mobile app development and prototype testing, compatibility testing and service quality monitoring.

The company serves mostly small and medium sized enterprises, mostly mobile gaming firms and mobile app developers, as well as financial technology companies.