diff --git a/test/lit.cfg b/test/lit.cfg
index 846a6e92ca5114760936e0e2f16979a80389151c..b7e64b6a28425f2228230366ef7495347684ae81 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -313,6 +313,7 @@ for pattern in [r"\bFileCheck\b",
                 NoPreHyphenDot + r"\bclang-check\b" + NoPostHyphenDot,
                 NoPreHyphenDot + r"\bclang-format\b" + NoPostHyphenDot,
                 NoPreHyphenDot + r"\bclang-interpreter\b" + NoPostHyphenDot,
+                # FIXME: Some clang test uses opt?
                 NoPreHyphenDot + r"\bopt\b" + NoPostBar + NoPostHyphenDot,
                 # Handle these specially as they are strings searched
                 # for during testing.