diff --git a/test/tabline.vim b/test/tabline.vim
index 304b1be..c0b4413 100644
--- a/test/tabline.vim
+++ b/test/tabline.vim
@@ -2,7 +2,7 @@ let s:suite = themis#suite('tabline')
 let s:assert = themis#helper('assert')
 
 function! s:suite.before_each()
-  let g:lightline = {}
+  let g:lightline = { 'winwidth': 180 }
   call lightline#init()
   tabnew
   tabonly