diff --git a/expat/tests/README.txt b/expat/tests/README.txt
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+This directory contains the (fledgling) test suite for Expat.  The
+tests provide general unit testing and regression coverage.  The tests
+are not expected to be useful examples of Expat usage; see the
+examples/ directory for that.
+
+The Expat tests use the "Check" unit testing framework for C.  More
+information on Check can be found at:
+
+	http://check.sourceforge.net/
+
+Check must be installed before the unit tests can be compiled & run.
+
+Since both Check and this test suite are young, it can all change in a
+later version.