diff --git a/src/testdir/test_digraph.vim b/src/testdir/test_digraph.vim
index 2cf0751..30dae94 100644
--- a/src/testdir/test_digraph.vim
+++ b/src/testdir/test_digraph.vim
@@ -515,81 +515,81 @@
   call StopVimInTerminal(buf)
 endfunc
 
-func Test_setdigraph_function()
+func Test_digraph_set_function()
   new
-  call setdigraph('aa', 'あ')
+  call digraph_set('aa', 'あ')
   call Put_Dig('aa')
   call assert_equal('あ', getline('$'))
-  call setdigraph(' i', 'い')
+  call digraph_set(' i', 'い')
   call Put_Dig(' i')
   call assert_equal('い', getline('$'))
-  call setdigraph('  ', 'う')
+  call digraph_set('  ', 'う')
   call Put_Dig('  ')
   call assert_equal('う', getline('$'))
 
-  eval 'aa'->setdigraph('え')
+  eval 'aa'->digraph_set('え')
   call Put_Dig('aa')
   call assert_equal('え', getline('$'))
 
-  call assert_fails('call setdigraph("aaa", "あ")', 'E1214: Digraph must be just two characters: aaa')
-  call assert_fails('call setdigraph("b", "あ")', 'E1214: Digraph must be just two characters: b')
-  call assert_fails('call setdigraph("あ", "あ")', 'E1214: Digraph must be just two characters: あ')
-  call assert_fails('call setdigraph("aa", "ああ")', 'E1215: Digraph must be one character: ああ')
-  call assert_fails('call setdigraph("aa", "か" .. nr2char(0x3099))',  'E1215: Digraph must be one character: か' .. nr2char(0x3099))
+  call assert_fails('call digraph_set("aaa", "あ")', 'E1214: Digraph must be just two characters: aaa')
+  call assert_fails('call digraph_set("b", "あ")', 'E1214: Digraph must be just two characters: b')
+  call assert_fails('call digraph_set("あ", "あ")', 'E1214: Digraph must be just two characters: あ')
+  call assert_fails('call digraph_set("aa", "ああ")', 'E1215: Digraph must be one character: ああ')
+  call assert_fails('call digraph_set("aa", "か" .. nr2char(0x3099))',  'E1215: Digraph must be one character: か' .. nr2char(0x3099))
   bwipe!
 endfunc
 
-func Test_getdigraph_function()
+func Test_digraph_get_function()
   " Built-in digraphs
-  call assert_equal('∞', getdigraph('00'))
+  call assert_equal('∞', digraph_get('00'))
 
   " User-defined digraphs
-  call setdigraph('aa', 'あ')
-  call setdigraph(' i', 'い')
-  call setdigraph('  ', 'う')
-  call assert_equal('あ', getdigraph('aa'))
-  call assert_equal('あ', 'aa'->getdigraph())
-  call assert_equal('い', getdigraph(' i'))
-  call assert_equal('う', getdigraph('  '))
-  call assert_fails('call getdigraph("aaa")', 'E1214: Digraph must be just two characters: aaa')
-  call assert_fails('call getdigraph("b")', 'E1214: Digraph must be just two characters: b')
+  call digraph_set('aa', 'あ')
+  call digraph_set(' i', 'い')
+  call digraph_set('  ', 'う')
+  call assert_equal('あ', digraph_get('aa'))
+  call assert_equal('あ', 'aa'->digraph_get())
+  call assert_equal('い', digraph_get(' i'))
+  call assert_equal('う', digraph_get('  '))
+  call assert_fails('call digraph_get("aaa")', 'E1214: Digraph must be just two characters: aaa')
+  call assert_fails('call digraph_get("b")', 'E1214: Digraph must be just two characters: b')
 endfunc
 
-func Test_getdigraph_function_encode()
+func Test_digraph_get_function_encode()
   CheckFeature iconv
   let testcases = {
         \'00': '∞',
         \'aa': 'あ',
         \}
   for [key, ch] in items(testcases)
-    call setdigraph(key, ch)
+    call digraph_set(key, ch)
     set encoding=japan
-    call assert_equal(iconv(ch, 'utf-8', 'japan'), getdigraph(key))
+    call assert_equal(iconv(ch, 'utf-8', 'japan'), digraph_get(key))
     set encoding&
   endfor
 endfunc
 
-func Test_setdigraphlist_function()
-  call setdigraphlist([['aa', 'き'], ['bb', 'く']])
-  call assert_equal('き', getdigraph('aa'))
-  call assert_equal('く', getdigraph('bb'))
+func Test_digraph_setlist_function()
+  call digraph_setlist([['aa', 'き'], ['bb', 'く']])
+  call assert_equal('き', digraph_get('aa'))
+  call assert_equal('く', digraph_get('bb'))
 
-  call assert_fails('call setdigraphlist([[]])', 'E1216:')
-  call assert_fails('call setdigraphlist([["aa", "b", "cc"]])', '1216:')
-  call assert_fails('call setdigraphlist([["あ", "あ"]])', 'E1214: Digraph must be just two characters: あ')
+  call assert_fails('call digraph_setlist([[]])', 'E1216:')
+  call assert_fails('call digraph_setlist([["aa", "b", "cc"]])', '1216:')
+  call assert_fails('call digraph_setlist([["あ", "あ"]])', 'E1214: Digraph must be just two characters: あ')
 endfunc
 
-func Test_getdigraphlist_function()
+func Test_digraph_getlist_function()
   " Make sure user-defined digraphs are defined
-  call setdigraphlist([['aa', 'き'], ['bb', 'く']])
+  call digraph_setlist([['aa', 'き'], ['bb', 'く']])
 
-  for pair in getdigraphlist(1)
-    call assert_equal(getdigraph(pair[0]), pair[1])
+  for pair in digraph_getlist(1)
+    call assert_equal(digraph_get(pair[0]), pair[1])
   endfor
 
   " We don't know how many digraphs are registered before, so check the number
   " of digraphs returned.
-  call assert_equal(getdigraphlist()->len(), getdigraphlist(0)->len())
-  call assert_notequal((getdigraphlist()->len()), getdigraphlist(1)->len())
+  call assert_equal(digraph_getlist()->len(), digraph_getlist(0)->len())
+  call assert_notequal((digraph_getlist()->len()), digraph_getlist(1)->len())
 endfunc
 " vim: shiftwidth=2 sts=2 expandtab