--- old/langtools/test/TEST.groups	2015-06-02 22:48:53.655780611 -0700
+++ new/langtools/test/TEST.groups	2015-06-02 22:48:53.471780606 -0700
@@ -22,11 +22,19 @@
 
 # Tiered testing definitions
 
-# All langtools tests are tier 1
+# All langtools tests are tier 1.
 tier1 = \
     tools \
     com \
     lib
 
-# No langtools tests are tier 2
+# No langtools tests are tier 2.
 tier2 = 
+
+# No langtools tests are tier 3 either.
+tier3 = 
+
+# Support for invoking tiered testing via the Makefile
+#langtools_tier1 = :tier1
+#langtools_tier2 = :tier2
+#langtools_tier3 = :tier3