diff --git a/regression-tests/mixed-type-safety-1.cpp2 b/regression-tests/mixed-type-safety-1.cpp2
index 890471c2e..2571f1aeb 100644
--- a/regression-tests/mixed-type-safety-1.cpp2
+++ b/regression-tests/mixed-type-safety-1.cpp2
@@ -27,6 +27,8 @@ print: ( msg: std::string, b: bool ) =
 
 main: () -> int = 
 {
+    // Full qualification is necessary to avoid ambiguity in C++23
+    // C++23 defines std::print, which would be picked up here by ADL
     ::print( "1.1 is int? ", 1.1 is int );
     ::print( "1   is int? ", 1   is int );
 
diff --git a/regression-tests/pure2-type-safety-1.cpp2 b/regression-tests/pure2-type-safety-1.cpp2
index 263e39be5..11734de99 100644
--- a/regression-tests/pure2-type-safety-1.cpp2
+++ b/regression-tests/pure2-type-safety-1.cpp2
@@ -23,6 +23,8 @@ main: () -> int =
 
 test_generic: ( x, msg ) = {
     msgx: std::string = msg;
+    // Full qualification is necessary to avoid ambiguity in C++23
+    // C++23 defines std::print, which would be picked up here by ADL
     ::print( msgx + " is int? ", x is int );
 }
 
diff --git a/regression-tests/test-results/mixed-type-safety-1.cpp b/regression-tests/test-results/mixed-type-safety-1.cpp
index e9b1058dc..59c67ac87 100644
--- a/regression-tests/test-results/mixed-type-safety-1.cpp
+++ b/regression-tests/test-results/mixed-type-safety-1.cpp
@@ -56,6 +56,8 @@ auto print(cpp2::impl::in<std::string> msg, cpp2::impl::in<bool> b) -> void
 #line 28 "mixed-type-safety-1.cpp2"
 [[nodiscard]] auto main() -> int
 {
+    // Full qualification is necessary to avoid ambiguity in C++23
+    // C++23 defines std::print, which would be picked up here by ADL
     ::print("1.1 is int? ", cpp2::impl::is<int>(1.1));
     ::print( "1   is int? ", cpp2::impl::is<int>(1));
 
diff --git a/regression-tests/test-results/pure2-type-safety-1.cpp b/regression-tests/test-results/pure2-type-safety-1.cpp
index 138f3ef54..10d7e38c9 100644
--- a/regression-tests/test-results/pure2-type-safety-1.cpp
+++ b/regression-tests/test-results/pure2-type-safety-1.cpp
@@ -19,9 +19,9 @@
 #line 24 "pure2-type-safety-1.cpp2"
 auto test_generic(auto const& x, auto const& msg) -> void;
 
-#line 29 "pure2-type-safety-1.cpp2"
+#line 31 "pure2-type-safety-1.cpp2"
 auto print(cpp2::impl::in<std::string> msg, cpp2::impl::in<bool> b) -> void;
-#line 35 "pure2-type-safety-1.cpp2"
+#line 37 "pure2-type-safety-1.cpp2"
 
 #line 1 "pure2-type-safety-1.cpp2"
 
@@ -55,10 +55,12 @@ auto print(cpp2::impl::in<std::string> msg, cpp2::impl::in<bool> b) -> void;
 #line 24 "pure2-type-safety-1.cpp2"
 auto test_generic(auto const& x, auto const& msg) -> void{
     std::string msgx {msg}; 
+    // Full qualification is necessary to avoid ambiguity in C++23
+    // C++23 defines std::print, which would be picked up here by ADL
     ::print(cpp2::move(msgx) + " is int? ", cpp2::impl::is<int>(x));
 }
 
-#line 29 "pure2-type-safety-1.cpp2"
+#line 31 "pure2-type-safety-1.cpp2"
 auto print(cpp2::impl::in<std::string> msg, cpp2::impl::in<bool> b) -> void{
     cpp2::impl::deferred_init<char const*> bmsg; 
     if (b) { bmsg.construct("true");}