diff --git a/json/src/macros.rs b/json/src/macros.rs
index 8ac4484..7a34c2c 100644
--- a/json/src/macros.rs
+++ b/json/src/macros.rs
@@ -196,6 +196,12 @@ macro_rules! json_internal {
         json_internal!(@object $object [,] (,));
     };
 
+    // Key is fully parenthesized. This avoids clippy double_parens false
+    // positives because the parenthesization may be necessary here.
+    (@object $object:ident () ($key:expr) : $($rest:tt)*) => {
+        json_internal!(@object $object ($key) : $($rest)*);
+    };
+
     // Munch a token into the current key.
     (@object $object:ident ($($key:tt)*) $tt:tt $($rest:tt)*) => {
         json_internal!(@object $object ($($key)* $tt) $($rest)*);
diff --git a/json_tests/tests/test.rs b/json_tests/tests/test.rs
index 2b0ec48..5d7befc 100644
--- a/json_tests/tests/test.rs
+++ b/json_tests/tests/test.rs
@@ -1,3 +1,5 @@
+#![cfg_attr(feature = "cargo-clippy", allow(float_cmp))]
+
 #![cfg_attr(feature = "trace-macros", feature(trace_macros))]
 #[cfg(feature = "trace-macros")]
 trace_macros!(true);
@@ -1006,8 +1008,7 @@ fn test_parse_list() {
         ("[1, [2, 3]]", (1u64, (2u64, 3u64))),
     ]);
 
-    let v: () = from_str("[]").unwrap();
-    assert_eq!(v, ());
+    from_str::<()>("[]").unwrap();
 }
 
 #[test]