diff --git a/toolchain/lexer/tokenized_buffer_test.cpp b/toolchain/lexer/tokenized_buffer_test.cpp
index 4d70b8e4c800..73c90f180d8a 100644
--- a/toolchain/lexer/tokenized_buffer_test.cpp
+++ b/toolchain/lexer/tokenized_buffer_test.cpp
@@ -10,7 +10,6 @@
 #include <iterator>
 
 #include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/None.h"
 #include "llvm/ADT/Sequence.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/Twine.h"