1 files changed, 2 insertions, 0 deletions
diff --git a/src/test.h b/src/test.h
index 89c0974..74ee430 100644
--- a/src/test.h
+++ b/src/test.h
@@ -20,6 +20,8 @@
 
 struct Node;
 
+// A base test fixture that includes a State object with a
+// builtin "cat" rule.
 struct StateTestWithBuiltinRules : public testing::Test {
   StateTestWithBuiltinRules();
   Node* GetNode(const string& path);