diff --git a/src/testdir/test_compiler.vim b/src/testdir/test_compiler.vim
index 26404c6..b7315e1 100644
--- a/src/testdir/test_compiler.vim
+++ b/src/testdir/test_compiler.vim
@@ -71,10 +71,10 @@
   call assert_match('^"compiler ' .. clist .. '$', @:)
 
   call feedkeys(":compiler p\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_match('"compiler pandoc pbx perl\( p[a-z]\+\)\+ pylint pyunit', @:)
+  call assert_match('"compiler pandoc pbx perl\( p[a-z_]\+\)\+ pylint pyunit', @:)
 
   call feedkeys(":compiler! p\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_match('"compiler! pandoc pbx perl\( p[a-z]\+\)\+ pylint pyunit', @:)
+  call assert_match('"compiler! pandoc pbx perl\( p[a-z_]\+\)\+ pylint pyunit', @:)
 endfunc
 
 func Test_compiler_error()