diff --git a/shell.js b/shell.js
index f32e1f7..b4c75b2 100644
--- a/shell.js
+++ b/shell.js
@@ -513,8 +513,14 @@ exports.mkdir = wrap('mkdir', _mkdir);
 //@ ### test(expression)
 //@ Available expression primaries:
 //@
+//@ + `'-b', 'path'`: true if path is a block device
+//@ + `'-c', 'path'`: true if path is a character device
 //@ + `'-d', 'path'`: true if path is a directory
+//@ + `'-e', 'path'`: true if path exists
 //@ + `'-f', 'path'`: true if path is a regular file
+//@ + `'-L', 'path'`: true if path is a symboilc link
+//@ + `'-p', 'path'`: true if path is a pipe (FIFO)
+//@ + `'-S', 'path'`: true if path is a socket
 //@
 //@ Examples:
 //@