README: Fix command and add note.

You need to run 'make -C extra-tests check' to run the tests.

diff --git a/README b/README
index be91071..385fcd5 100644 (file)
--- a/README
+++ b/README
@@ -12,10 +12,12 @@ Running the tests
 You will need the main hivex source package.  Build hivex as normal
 (eg. './configure && make && make check').  Then run the extra tests:
 
-  make -C extra-tests HIVEX_TEST_DATA=/path/to/hivex-test-data
+  make -C extra-tests check HIVEX_TEST_DATA=/path/to/hivex-test-data
 
 where obviously you need to set HIVEX_TEST_DATA to point to these
-files.
+files.  HIVEX_TEST_DATA defaults to ../hivex-test-data so if you have
+hivex & hivex-test-data checked out under the same directory it should
+just work.
 
 Format of the data
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