diff --git a/test/autoload/previm_test.vim b/test/autoload/previm_test.vim
index cf00b4ca1..01ee13a5e 100644
--- a/test/autoload/previm_test.vim
+++ b/test/autoload/previm_test.vim
@@ -6,7 +6,7 @@ let s:t = themis#suite('convert_to_content') "{{{
 function! s:t.empty_lines()
   let arg = []
   let expected = ''
-  call s:assert.equals(expected, previm#convert_to_content(arg))
+  call s:assert.equals(previm#convert_to_content(arg), expected)
 endfunction
 
 function! s:t.not_exists_escaped()
@@ -14,7 +14,7 @@ function! s:t.not_exists_escaped()
   let expected = 
         \   'aaabbb' . s:newline
         \ . 'あいうえお漢字'
-  call s:assert.equals(expected, previm#convert_to_content(arg))
+  call s:assert.equals(previm#convert_to_content(arg), expected)
 endfunction
 
 function! s:t.exists_backslash()
@@ -22,7 +22,7 @@ function! s:t.exists_backslash()
   let expected =
         \   '\\(x -> x + 2)' . s:newline
         \ . 'あいうえお漢字'
-  call s:assert.equals(expected, previm#convert_to_content(arg))
+  call s:assert.equals(previm#convert_to_content(arg), expected)
 endfunction
 
 function! s:t.exists_double_quotes()
@@ -30,7 +30,7 @@ function! s:t.exists_double_quotes()
   let expected =
         \   'he said. \"Hello, john\"' . s:newline
         \ . 'あいうえお漢字'
-  call s:assert.equals(expected, previm#convert_to_content(arg))
+  call s:assert.equals(previm#convert_to_content(arg), expected)
 endfunction
 "}}}
 let s:t = themis#suite('relative_to_absolute') "{{{
@@ -38,31 +38,31 @@ let s:t = themis#suite('relative_to_absolute') "{{{
 function! s:t.nothing_when_empty()
   let arg_line = ''
   let expected = ''
-  call s:assert.equals(expected, previm#relative_to_absolute_imgpath(arg_line, ''))
+  call s:assert.equals(previm#relative_to_absolute_imgpath(arg_line, ''), expected)
 endfunction
 
 function! s:t.nothing_when_not_href()
   let arg_line = 'previm.dummy.com/some/path/img.png'
   let expected = 'previm.dummy.com/some/path/img.png'
-  call s:assert.equals(expected, previm#relative_to_absolute_imgpath(arg_line, ''))
+  call s:assert.equals(previm#relative_to_absolute_imgpath(arg_line, ''), expected)
 endfunction
 
 function! s:t.nothing_when_absolute_by_http()
   let arg_line = 'http://previm.dummy.com/some/path/img.png'
   let expected = 'http://previm.dummy.com/some/path/img.png'
-  call s:assert.equals(expected, previm#relative_to_absolute_imgpath(arg_line, ''))
+  call s:assert.equals(previm#relative_to_absolute_imgpath(arg_line, ''), expected)
 endfunction
 
 function! s:t.nothing_when_absolute_by_https()
   let arg_line = 'https://previm.dummy.com/some/path/img.png'
   let expected = 'https://previm.dummy.com/some/path/img.png'
-  call s:assert.equals(expected, previm#relative_to_absolute_imgpath(arg_line, ''))
+  call s:assert.equals(previm#relative_to_absolute_imgpath(arg_line, ''), expected)
 endfunction
 
 function! s:t.nothing_when_absolute_by_file()
   let arg_line = 'file://previm/some/path/img.png'
   let expected = 'file://previm/some/path/img.png'
-  call s:assert.equals(expected, previm#relative_to_absolute_imgpath(arg_line, ''))
+  call s:assert.equals(previm#relative_to_absolute_imgpath(arg_line, ''), expected)
 endfunction
 
 function! s:t.replace_path_when_relative()
@@ -86,19 +86,19 @@ let s:t = themis#suite('fetch_imgpath_elements') "{{{
 function! s:t.nothing_when_empty()
   let arg = ''
   let expected = s:empty_img_elements()
-  call s:assert.equals(expected, previm#fetch_imgpath_elements(arg))
+  call s:assert.equals(previm#fetch_imgpath_elements(arg), expected)
 endfunction
 
 function! s:t.nothing_when_not_img_statement()
   let arg = '## hogeほげ'
   let expected = s:empty_img_elements()
-  call s:assert.equals(expected, previm#fetch_imgpath_elements(arg))
+  call s:assert.equals(previm#fetch_imgpath_elements(arg), expected)
 endfunction
 
 function! s:t.get_title_and_path()
   let arg = '![IMG](path/img.png)'
   let expected = {'title': 'IMG', 'path': 'path/img.png'}
-  call s:assert.equals(expected, previm#fetch_imgpath_elements(arg))
+  call s:assert.equals(previm#fetch_imgpath_elements(arg), expected)
 endfunction
 
 function! s:empty_img_elements()
@@ -160,7 +160,7 @@ function! s:t.custom_content_if_exists_file()
   call previm#refresh_css()
 
   let actual = readfile(previm#make_preview_file_path('css/previm.css'))
-  call s:assert.equals(["@import url('user_custom.css');"], actual)
+  call s:assert.equals(actual, ["@import url('user_custom.css');"])
 endfunction
 
 function! s:t.empty_if_not_exists_file()
@@ -169,6 +169,6 @@ function! s:t.empty_if_not_exists_file()
   call previm#refresh_css()
 
   let actual = readfile(previm#make_preview_file_path('css/previm.css'))
-  call s:assert.equals([], actual)
+  call s:assert.equals(actual, [])
 endfunction
 "}}}