diff --git a/ale_linters/nasm/nasm.vim b/ale_linters/nasm/nasm.vim
index 29d19e62..cb2119a6 100644
--- a/ale_linters/nasm/nasm.vim
+++ b/ale_linters/nasm/nasm.vim
@@ -8,10 +8,12 @@ function! ale_linters#nasm#nasm#GetCommand(buffer) abort
     " Note that NASM requires a trailing slash for the -I option.
     let l:separator = has('win32') ? '\' : '/'
     let l:path = fnamemodify(bufname(a:buffer), ':p:h') . l:separator
+    let l:output_null = has('win32') ? 'NUL' : '/dev/null'
 
     return '%e -X gnu -I ' . ale#Escape(l:path)
     \   . ale#Pad(ale#Var(a:buffer, 'nasm_nasm_options'))
     \   . ' %s'
+    \   . ' -o ' . l:output_null
 endfunction
 
 function! ale_linters#nasm#nasm#Handle(buffer, lines) abort
diff --git a/test/command_callback/test_nasm_nasm_command_callbacks.vader b/test/command_callback/test_nasm_nasm_command_callbacks.vader
index 0d3e572a..8e077306 100644
--- a/test/command_callback/test_nasm_nasm_command_callbacks.vader
+++ b/test/command_callback/test_nasm_nasm_command_callbacks.vader
@@ -2,9 +2,9 @@ Before:
   call ale#assert#SetUpLinterTest('nasm', 'nasm')
 
   let b:command_tail =
-  \ ' -X gnu -I ' . ale#Escape(getcwd() . (has('win32') ? '\' : '/')) . ' %s'
+  \ ' -X gnu -I ' . ale#Escape(getcwd() . (has('win32') ? '\' : '/')) . ' %s -o ' . (has('win32') ? 'NUL' : '/dev/null')
   let b:command_tail_opt =
-  \ ' -X gnu -I ' . ale#Escape(getcwd() . (has('win32') ? '\' : '/')) . ' -w+orphan-labels %s'
+  \ ' -X gnu -I ' . ale#Escape(getcwd() . (has('win32') ? '\' : '/')) . ' -w+orphan-labels %s -o ' . (has('win32') ? 'NUL' : '/dev/null')
 
 After:
   unlet! b:command_tail
@@ -23,7 +23,7 @@ Execute(The options should be configurable):
   let b:ale_nasm_nasm_options = '-w-macro-params'
 
   AssertLinter 'nasm', ale#Escape('nasm')
-  \ . ' -X gnu -I ' . ale#Escape(getcwd() . (has('win32') ? '\' : '/')) . ' -w-macro-params %s'
+  \ . ' -X gnu -I ' . ale#Escape(getcwd() . (has('win32') ? '\' : '/')) . ' -w-macro-params %s -o ' . (has('win32') ? 'NUL' : '/dev/null')
 
 Execute(The options should be used in command):
   let b:ale_nasm_nasm_options = '-w+orphan-labels'