THRIFT-3133 Allow "make cross" and "make precross" to run without building all languages
diff --git a/test/README.md b/test/README.md
index 91e4c26..c1a73ec 100755
--- a/test/README.md
+++ b/test/README.md
@@ -13,9 +13,9 @@
This starts the [test.py](test.py) script which does the real cross test with
different transports, protocols and languages.
-Note that this requires basically everything to be built, otherwise test cases
-for missing languages will fail. If you skip building some languages, or simply
-need more control, read following section.
+Note that this skips any language that is not built locally. It also skips
+tests that are known to be failing. If you need more control over which tests
+to run, read following section.
### B. Using test script directly