diff --git a/test/libsolidity/syntaxTests/operators/userDefined/implementing_operator_with_library_function_private_at_file_level.sol b/test/libsolidity/syntaxTests/operators/userDefined/implementing_operator_with_library_function_private_at_file_level.sol
new file mode 100644
index 000000000..35d8d0ab1
--- /dev/null
+++ b/test/libsolidity/syntaxTests/operators/userDefined/implementing_operator_with_library_function_private_at_file_level.sol
@@ -0,0 +1,9 @@
+type Int is int128;
+
+library L {
+    function privateOperator(Int, Int) private pure returns (Int) {}
+}
+
+using {L.privateOperator as +} for Int;
+// ----
+// TypeError 6772: (112-129): Function "L.privateOperator" is private and therefore cannot be attached to a type outside of the library where it is defined.
diff --git a/test/libsolidity/syntaxTests/operators/userDefined/implementing_operator_with_library_function_public_internal_or_private.sol b/test/libsolidity/syntaxTests/operators/userDefined/implementing_operator_with_library_function_public_internal_or_private.sol
index 1c66c0ae6..d814f0aba 100644
--- a/test/libsolidity/syntaxTests/operators/userDefined/implementing_operator_with_library_function_public_internal_or_private.sol
+++ b/test/libsolidity/syntaxTests/operators/userDefined/implementing_operator_with_library_function_public_internal_or_private.sol
@@ -3,11 +3,7 @@ type Int is int128;
 library L {
     function publicOperator(Int, Int) public pure returns (Int) {}
     function internalOperator(Int, Int) internal pure returns (Int) {}
-    function privateOperator(Int, Int) private pure returns (Int) {}
 }
 
 using {L.publicOperator as +} for Int;
 using {L.internalOperator as +} for Int;
-// FIXME: Being able to use private library functions in a file-level 'using for' is a bug.
-// See: https://github.com/ethereum/solidity/issues/13764
-using {L.privateOperator as +} for Int;