diff --git a/src/vm/wren_compiler.c b/src/vm/wren_compiler.c
index c11dac8b..af03e30d 100644
--- a/src/vm/wren_compiler.c
+++ b/src/vm/wren_compiler.c
@@ -2659,7 +2659,8 @@ static GrammarRule* getRule(TokenType type)
   return &rules[type];
 }
 
-// TODO: Doc.
+// Completes parsing an expression after the prefix part has been parsed.
+// Parses any trailing infix expressions.
 static void parseInfix(Compiler* compiler, bool allowAssignment,
                        Precedence precedence)
 {
diff --git a/src/vm/wren_core.c b/src/vm/wren_core.c
index 79ef463a..d20bb68e 100644
--- a/src/vm/wren_core.c
+++ b/src/vm/wren_core.c
@@ -235,14 +235,6 @@ DEF_PRIMITIVE(fiber_yield1)
   return false;
 }
 
-DEF_PRIMITIVE(fn_new)
-{
-  if (!validateFn(vm, args[1], "Argument")) return false;
-
-  // The block argument is already a function, so just return it.
-  RETURN_VAL(args[1]);
-}
-
 DEF_PRIMITIVE(fn_arity)
 {
   RETURN_NUM(AS_FN(args[0])->arity);
@@ -1161,7 +1153,6 @@ void wrenInitializeCore(WrenVM* vm)
   PRIMITIVE(vm->fiberClass, "try()", fiber_try);
 
   vm->fnClass = AS_CLASS(wrenFindVariable(vm, coreModule, "Fn"));
-  PRIMITIVE(vm->fnClass->obj.classObj, "new(_)", fn_new);
 
   PRIMITIVE(vm->fnClass, "arity", fn_arity);
   fnCall(vm, "call()");
diff --git a/test/core/function/new_wrong_arg_type.wren b/test/core/function/new_wrong_arg_type.wren
deleted file mode 100644
index 0c27fb15..00000000
--- a/test/core/function/new_wrong_arg_type.wren
+++ /dev/null
@@ -1 +0,0 @@
-Fn.new(3) // expect runtime error: Argument must be a function.