This article proposes a new test called the “Anonymous Public Concern Test” which incorporates public concern analysis in enforcing Internet Service Provider [ISP] subpoenas in online defamation suits. Anonymous speech is an important aspect of First Amendment rights that warrants protection. Current tests used by courts to analyze whether to enforce ISP subpoenas are either too pro-plaintiff or too pro-defendant. The article’s proposed “Anonymous Public Concern Test” is the best approach in dealing with ISP subpoenas because it protects both anonymous speeches and preserves online defamation plaintiffs’ rights.