Fix attr_replace test

Signed-off-by: Jack Rickard <[email protected]>

Author: Skepfyr

test/attr_replace/dune

@@ -1,12 +1,21 @@
+(executable
+ (name ppx_attr_replace)
+ (modules ppx_attr_replace)
+ (libraries ppxlib)
+ (preprocess
+  (pps ppxlib.metaquot)))
+
 (rule
- (deps test.ml)
- (targets test.output.ml)
+ (enabled_if
+  (>= %{ocaml_version} "4.10.0"))
+ (deps ppx_attr_replace.exe test.ml)
+ (targets test.ml.actual)
  (action
   (with-stdout-to
    %{targets}
-   (run ./ppx/ppx_attr_replace.exe %{deps}))))
+   (run ./ppx_attr_replace.exe test.ml))))
 
 (rule
  (alias runtest)
  (action
-  (diff test.expected.ml test.output.ml)))
+  (diff test.ml.expected test.ml.actual)))