diff --git a/eval/tests/end_to_end_test.cc b/eval/tests/end_to_end_test.cc
index 56a652068..b99226884 100644
--- a/eval/tests/end_to_end_test.cc
+++ b/eval/tests/end_to_end_test.cc
@@ -100,7 +100,7 @@ TEST(EndToEndTest, SimpleOnePlusOne) {
 
 // Simple end-to-end test, which also serves as usage example.
 TEST(EndToEndTest, EmptyStringCompare) {
-  // AST CEL equivalent of "var.string_value == """
+  // AST CEL equivalent of "var.string_value == '' && var.int64_value == 0"
   constexpr char kExpr0[] = R"(
     call_expr: <
       function: "_&&_"