diff --git a/src/bson.rs b/src/bson.rs
index 2778d7f0..63534be6 100644
--- a/src/bson.rs
+++ b/src/bson.rs
@@ -449,7 +449,7 @@ impl Bson {
             Bson::UtcDatetime(ref v) => {
                 doc! {
                     "$date": {
-                        "$numberLong" => (v.timestamp() * 1000) + v.nanosecond() as i64 / 1_000_000,
+                        "$numberLong": (v.timestamp() * 1000) + v.nanosecond() as i64 / 1_000_000,
                     }
                 }
             }
@@ -461,7 +461,7 @@ impl Bson {
             #[cfg(feature = "decimal128")]
             Bson::Decimal128(ref v) => {
                 doc! {
-                    "$numberDecimal" => (v.to_string())
+                    "$numberDecimal": (v.to_string())
                 }
             }
             Bson::Undefined => {
diff --git a/src/macros.rs b/src/macros.rs
index 8cfcaca1..bef0e7bc 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -92,56 +92,31 @@ macro_rules! bson {
     };
 
     // Next value is `null`.
-    (@object $object:ident ($($key:tt)+) (=> null $($rest:tt)*) $copy:tt) => {
-        $crate::bson!(@object $object [$($key)+] ($crate::bson!(null)) $($rest)*);
-    };
-
     (@object $object:ident ($($key:tt)+) (: null $($rest:tt)*) $copy:tt) => {
         $crate::bson!(@object $object [$($key)+] ($crate::bson!(null)) $($rest)*);
     };
 
     // Next value is an array.
-    (@object $object:ident ($($key:tt)+) (=> [$($array:tt)*] $($rest:tt)*) $copy:tt) => {
-        $crate::bson!(@object $object [$($key)+] ($crate::bson!([$($array)*])) $($rest)*);
-    };
-
     (@object $object:ident ($($key:tt)+) (: [$($array:tt)*] $($rest:tt)*) $copy:tt) => {
         $crate::bson!(@object $object [$($key)+] ($crate::bson!([$($array)*])) $($rest)*);
     };
 
     // Next value is a map.
-    (@object $object:ident ($($key:tt)+) (=> {$($map:tt)*} $($rest:tt)*) $copy:tt) => {
-        $crate::bson!(@object $object [$($key)+] ($crate::bson!({$($map)*})) $($rest)*);
-    };
-
     (@object $object:ident ($($key:tt)+) (: {$($map:tt)*} $($rest:tt)*) $copy:tt) => {
         $crate::bson!(@object $object [$($key)+] ($crate::bson!({$($map)*})) $($rest)*);
     };
 
     // Next value is an expression followed by comma.
-    (@object $object:ident ($($key:tt)+) (=> $value:expr , $($rest:tt)*) $copy:tt) => {
-        $crate::bson!(@object $object [$($key)+] ($crate::bson!($value)) , $($rest)*);
-    };
-
     (@object $object:ident ($($key:tt)+) (: $value:expr , $($rest:tt)*) $copy:tt) => {
         $crate::bson!(@object $object [$($key)+] ($crate::bson!($value)) , $($rest)*);
     };
 
     // Last value is an expression with no trailing comma.
-    (@object $object:ident ($($key:tt)+) (=> $value:expr) $copy:tt) => {
-        $crate::bson!(@object $object [$($key)+] ($crate::bson!($value)));
-    };
-
     (@object $object:ident ($($key:tt)+) (: $value:expr) $copy:tt) => {
         $crate::bson!(@object $object [$($key)+] ($crate::bson!($value)));
     };
 
     // Missing value for last entry. Trigger a reasonable error message.
-    (@object $object:ident ($($key:tt)+) (=>) $copy:tt) => {
-        // "unexpected end of macro invocation"
-        $crate::bson!();
-    };
-
     (@object $object:ident ($($key:tt)+) (:) $copy:tt) => {
         // "unexpected end of macro invocation"
         $crate::bson!();
@@ -155,11 +130,6 @@ macro_rules! bson {
     };
 
     // Misplaced key-value separator. Trigger a reasonable error message.
-    (@object $object:ident () (=> $($rest:tt)*) ($kv_separator:tt $($copy:tt)*)) => {
-        // Takes no arguments so "no rules expected the token `=>`".
-        unimplemented!($kv_separator);
-    };
-
     (@object $object:ident () (: $($rest:tt)*) ($kv_separator:tt $($copy:tt)*)) => {
         // Takes no arguments so "no rules expected the token `:`".
         unimplemented!($kv_separator);
@@ -173,10 +143,6 @@ macro_rules! bson {
 
     // 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)*) $copy:tt) => {
-        $crate::bson!(@object $object ($key) (=> $($rest)*) (=> $($rest)*));
-    };
-
     (@object $object:ident () (($key:expr) : $($rest:tt)*) $copy:tt) => {
         $crate::bson!(@object $object ($key) (: $($rest)*) (: $($rest)*));
     };
diff --git a/tests/modules/encoder_decoder.rs b/tests/modules/encoder_decoder.rs
index dfe8c8a9..3dc31658 100644
--- a/tests/modules/encoder_decoder.rs
+++ b/tests/modules/encoder_decoder.rs
@@ -340,7 +340,7 @@ fn test_decode_utc_date_time_overflows() {
 
     let decoded = decode_document(&mut Cursor::new(raw)).unwrap();
 
-    let expected = doc! { "A" => Utc.timestamp(1_530_492_218, 999 * 1_000_000)};
+    let expected = doc! { "A": Utc.timestamp(1_530_492_218, 999 * 1_000_000)};
     assert_eq!(decoded, expected);
 }
 
@@ -366,7 +366,7 @@ fn test_encode_decode_decimal128() {
         26, 0, 0, 0, 19, 107, 101, 121, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 34, 0,
     ];
 
-    let doc = doc! { "key" => val };
+    let doc = doc! { "key": val };
 
     let mut buf = Vec::new();
     encode_document(&mut buf, &doc).unwrap();
diff --git a/tests/modules/macros.rs b/tests/modules/macros.rs
index 675ff322..205810a4 100644
--- a/tests/modules/macros.rs
+++ b/tests/modules/macros.rs
@@ -14,7 +14,7 @@ fn standard_format() {
     let doc = doc! {
         "float": 2.4,
         "string": "hello",
-        "array" => ["testing", 1, true, [1, 2]],
+        "array": ["testing", 1, true, [1, 2]],
         "doc": {
             "fish": "in",
             "a": "barrel",
@@ -47,53 +47,6 @@ fn standard_format() {
     assert_eq!(expected, format!("{}", doc));
 }
 
-// Support rocket format for backwards-compatibility with pre-0.10.
-#[test]
-fn rocket_format() {
-    let id_string = "thisismyname";
-    let string_bytes: Vec<_> = id_string.bytes().collect();
-    let mut bytes = [0; 12];
-    bytes[..12].clone_from_slice(&string_bytes[..12]);
-
-    let id = ObjectId::with_bytes(bytes);
-    let date = Utc::now();
-
-    let doc = doc! {
-        "float" => 2.4,
-        "string" => "hello",
-        "array" => ["testing", 1, true, ["nested", 2]],
-        "doc" => {
-            "fish" => "in",
-            "a" => "barrel",
-            "!" => 1,
-        },
-        "bool" => true,
-        "null" => null,
-        "regexp" => Bson::Regex(Regex { pattern: "s[ao]d".to_owned(), options: "i".to_owned() }),
-        "with_wrapped_parens" => (-20),
-        "code" => Bson::JavaScriptCode("function(x) { return x._id; }".to_owned()),
-        "i32" => 12,
-        "i64" => -55,
-        "timestamp" => Bson::TimeStamp(TimeStamp { time: 0, increment: 229_999_444 }),
-        "binary" => Binary { subtype: BinarySubtype::Md5, bytes: "thingies".to_owned().into_bytes() },
-        "_id" => id,
-        "date" => Bson::UtcDatetime(date),
-    };
-
-    let expected = format!(
-        "{{ float: 2.4, string: \"hello\", array: [\"testing\", 1, true, [\"nested\", 2]], doc: \
-         {{ fish: \"in\", a: \"barrel\", !: 1 }}, bool: true, null: null, regexp: /s[ao]d/i, \
-         with_wrapped_parens: -20, code: function(x) {{ return x._id; }}, i32: 12, i64: -55, \
-         timestamp: Timestamp(0, 229999444), binary: BinData(5, 0x{}), _id: ObjectId(\"{}\"), \
-         date: Date(\"{}\") }}",
-        hex::encode("thingies"),
-        hex::encode(id_string),
-        date
-    );
-
-    assert_eq!(expected, format!("{}", doc));
-}
-
 #[test]
 fn non_trailing_comma() {
     let doc = doc! {
@@ -105,17 +58,6 @@ fn non_trailing_comma() {
     assert_eq!(expected, format!("{}", doc));
 }
 
-#[test]
-fn non_trailing_comma_with_rockets() {
-    let doc = doc! {
-        "a" => "foo",
-        "b" => { "ok": "then" }
-    };
-
-    let expected = "{ a: \"foo\", b: { ok: \"then\" } }".to_string();
-    assert_eq!(expected, format!("{}", doc));
-}
-
 #[test]
 #[allow(clippy::float_cmp)]
 fn recursive_macro() {