diff --git a/test/Transforms/LoopPreheaders/2003-04-25-AssertFail.ll b/test/Transforms/LoopPreheaders/2003-04-25-AssertFail.ll
index 968c34fd17d..1acc4702c0e 100644
--- a/test/Transforms/LoopPreheaders/2003-04-25-AssertFail.ll
+++ b/test/Transforms/LoopPreheaders/2003-04-25-AssertFail.ll
@@ -1,3 +1,6 @@
+; This testcase exposed a problem with the loop identification pass (LoopInfo).
+; Basically, it was incorrectly calculating the loop nesting information.
+;
 ; RUN: as < %s | opt -preheaders
 
 implementation   ; Functions:
diff --git a/test/Transforms/LoopSimplify/2003-04-25-AssertFail.ll b/test/Transforms/LoopSimplify/2003-04-25-AssertFail.ll
index 968c34fd17d..1acc4702c0e 100644
--- a/test/Transforms/LoopSimplify/2003-04-25-AssertFail.ll
+++ b/test/Transforms/LoopSimplify/2003-04-25-AssertFail.ll
@@ -1,3 +1,6 @@
+; This testcase exposed a problem with the loop identification pass (LoopInfo).
+; Basically, it was incorrectly calculating the loop nesting information.
+;
 ; RUN: as < %s | opt -preheaders
 
 implementation   ; Functions: