test$ cat test.asm

test al, [0]
test [0], al
test$ nasm -v
NASM version 2.16.02rc2 compiled on Oct 12 2023
test$ nasm test.asm -l /dev/stderr
     1
     2 00000000 84060000                test al, [0]
     3 00000004 84060000                test [0], al
test$ ~/proj/nasmtest/rc/nasm -v
NASM version 3.01rc2 compiled on Oct  6 2025
test$ ~/proj/nasmtest/rc/nasm test.asm -l /dev/stderr
     1
test.asm:2: error: invalid combination of opcode and operands
     2                                  test al, [0]
     2          ******************       error: invalid combination of opcode and operands
     3 00000000 84060000                test [0], al
test$