In unicodesymbols we use the wasy fonts intensively. So we also need to check for them. (wasysym is not the font package itself, only a package to support it: "LaTeX support file to use the WASY-2 fonts. The wasysym package implements and easy to use interface for these symbols.")
\TestPackage{marvosym}
\TestPackage{pmboxdraw}
\TestPackage{textgreek}
+\TestPackage{wasy}
\TestPackage{wasysym}
% These packages are disabled in the unicodesymbols file
% see comment there