Annotate TODO with what syntax needs to be parsed
diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index da1e0cc..25a8824 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -69,21 +69,31 @@
 
     match path_string.as_ref() {
         // TODO better support for attributes
+        //
+        //      let a = A { #[a] b: c };
         "tests/rust/src/librustc_data_structures/blake2b.rs" |
         // TODO better support for attributes
+        //
+        //      enum A { B = #[a] 2 }
         "tests/rust/src/test/incremental/hashes/enum_defs.rs" |
         // TODO better support for attributes
+        //
+        //      { #![foo] }
         "tests/rust/src/test/pretty/stmt_expr_attributes.rs" |
-        // not actually a test case
-        "tests/rust/src/test/run-pass/auxiliary/macro-include-items-expr.rs" |
         // TODO better support for attributes
         "tests/rust/src/test/run-pass/cfg_stmt_expr.rs" |
         // TODO weird glob import
+        //
+        //      use ::*;
         "tests/rust/src/test/run-pass/import-glob-crate.rs" |
         // TODO better support for attributes
+        //
+        //      impl Foo { #![a] }
         "tests/rust/src/test/run-pass/inner-attrs-on-impl.rs" |
         // TODO better support for attributes
-        "tests/rust/src/test/run-pass/item-attributes.rs" => false,
+        "tests/rust/src/test/run-pass/item-attributes.rs" |
+        // not actually a test case
+        "tests/rust/src/test/run-pass/auxiliary/macro-include-items-expr.rs" => false,
         _ => true,
     }
 }