diff --git a/ChangeLog b/ChangeLog
index 59315e9..94e2b4e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -39,6 +39,8 @@
 	jit/jit-insn.c, tests/Makefile.am: add the "--dont-fold" option
 	to Dynamic Pascal, so that we can run the test cases without folding.
 
+	* tests/README: add a README file to describe how to write test cases.
+
 2004-05-11  Rhys Weatherley  <rweather@southern-storm.com.au>
 
 	* include/jit/jit-insn.h, jit/jit-insn.c, jit/jit-interp.cpp,
diff --git a/tests/README b/tests/README
new file mode 100644
index 0000000..b16b092
--- /dev/null
+++ b/tests/README
@@ -0,0 +1,43 @@
+
+This directory contains test cases for libjit, written in the
+"Dynamic Pascal" language.  To add a new test case, perform the
+following steps:
+
+    1. Create the "foo.pas" file, containing the source code for the
+       test case.  The test case should exit normally if it succeeds,
+       or call "Terminate(1)" if it fails.
+
+    2. Add "foo.pas" to the "TESTS" list in "Makefile.am".
+
+    3. Re-run "auto_gen.sh" and "configure".
+
+    4. Type "make check" in this directory to run all of the test cases.
+
+Or you can run the test case manually with "../dpas/dpas foo.pas".
+The test case is compiled and executed in a single step, in a similar
+fashion to using a scripting language.
+
+The following two options to "dpas" can help with debugging problems
+in libjit:
+
+    -d
+        Dump the three-address form of each function as it is compiled.
+
+    -D
+        Dump the three-address and compiled forms of each function.
+
+If you are unfamiliar with the syntax of Pascal, or merely a little rusty,
+then the following EBNF grammar should help:
+
+    http://www.cs.qub.ac.uk/~S.Fitzpatrick/Teaching/Pascal/EBNF.html
+
+You can also get copies of the Pascal standards at:
+
+    http://www.pascal-central.com/
+
+Dynamic Pascal is a subset of Standard Pascal, designed primarily for
+testing libjit.  Patches are welcome to make it a more faithful Pascal
+implementation.
+
+Also see the file "dpas-builtin.c" for a list of builtin procedures and
+functions that you can use in your test cases.