There are now different sections, expressed by the first letter in the
scripts names:

 A: basic command parsing and execution
 B: builtins
 C: shell commands with special syntax
 D: substititution
 E: options
 K: features adopted from ksh
 P: privileged (needs super-user privileges)
 V: modules
 W: builtin interactive commands and constructs
 X: line editing
 Y: completion
 Z: separate systems and user contributions

You will need to run these by using `make test' in the Test subdirectory of
the build area for your system (which may or may not be the same as the
Test subdirectory of the source tree), or the directory above.  You can get
more information about the tests being performed with
  ZTST_verbose=1 make check
(`test' is equivalent to `check') or change 1 to 2 for even more detail.

A test file is usually aborted on the first error.  To continue to the
end, run with
  ZTST_continue=1 make check
This can usefully be combined with ZTST_verbose.  The test is always
aborted on a syntax error as in that case it is not obvoius how to
continue.

Individual or groups of tests can be performed with
  make TESTNUM=C02 check
or
  make TESTNUM=C check
to perform just the test beginning C02, or all tests beginning C,
respectively.

Instructions on how to write tests are given in B01cd.ztst, which acts as a
model.