diff --git a/src/lazy/binary/raw/v1_1/immutable_buffer.rs b/src/lazy/binary/raw/v1_1/immutable_buffer.rs
index 26b1e881..aed2ce23 100644
--- a/src/lazy/binary/raw/v1_1/immutable_buffer.rs
+++ b/src/lazy/binary/raw/v1_1/immutable_buffer.rs
@@ -1546,7 +1546,7 @@ mod tests {
         // to its own address.
         let mut macro_definitions = String::from("$ion_encoding::(\n  (macro_table\n");
         for address in MacroTable::FIRST_USER_MACRO_ID..MAX_TEST_MACRO_ADDRESS {
-            write!(macro_definitions, "    (macro m{address} () {address})\n")?;
+            writeln!(macro_definitions, "    (macro m{address} () {address})")?;
         }
         macro_definitions.push_str("  )\n)\n");
         let encoding_directive = Element::read_one(macro_definitions)?;
diff --git a/src/lazy/encoder/binary/v1_1/value_writer.rs b/src/lazy/encoder/binary/v1_1/value_writer.rs
index 3ba9838c..d617dfac 100644
--- a/src/lazy/encoder/binary/v1_1/value_writer.rs
+++ b/src/lazy/encoder/binary/v1_1/value_writer.rs
@@ -702,7 +702,7 @@ impl<'value, 'top> BinaryValueWriter_1_1<'value, 'top> {
                     // Opcode with low nibble setting bias
                     0x40 | low_opcode_nibble as u8,
                     // Remaining byte of magnitude in biased address
-                    0xFF & biased as u8,
+                    biased as u8,
                 ]);
             }
             MacroIdRef::LocalAddress(address) if address <= MAX_20_BIT_ADDRESS => {
@@ -716,7 +716,7 @@ impl<'value, 'top> BinaryValueWriter_1_1<'value, 'top> {
                         0x50 | low_opcode_nibble as u8,
                     ],
                     // Remaining bytes of magnitude in biased address
-                    &(0xFFFF & biased as u16).to_le_bytes(),
+                    &(biased as u16).to_le_bytes(),
                 ]);
             }
             MacroIdRef::LocalAddress(_address) => {