diff --git a/src/testdir/test_bufline.vim b/src/testdir/test_bufline.vim
index 183a186..50f7275 100644
--- a/src/testdir/test_bufline.vim
+++ b/src/testdir/test_bufline.vim
@@ -22,7 +22,7 @@
   call assert_equal(1, setbufline(b, 5, ['x']))
   call assert_equal(1, setbufline(bufnr('$') + 1, 1, ['x']))
   call assert_equal(0, setbufline(b, 4, ['d', 'e']))
-  call assert_equal(['c'], getbufline(b, 3))
+  call assert_equal(['c'], b->getbufline(3))
   call assert_equal(['d'], getbufline(b, 4))
   call assert_equal(['e'], getbufline(b, 5))
   call assert_equal([], getbufline(b, 6))
diff --git a/src/testdir/test_bufwintabinfo.vim b/src/testdir/test_bufwintabinfo.vim
index 7f0a6ce..d9b3691 100644
--- a/src/testdir/test_bufwintabinfo.vim
+++ b/src/testdir/test_bufwintabinfo.vim
@@ -88,7 +88,7 @@
     call assert_equal(2, tablist[1].tabnr)
     call assert_equal('build', tablist[0].variables.space)
     call assert_equal(w2_id, tablist[0].windows[0])
-    call assert_equal([], gettabinfo(3))
+    call assert_equal([], 3->gettabinfo())
 
     tabonly | only
 
@@ -106,7 +106,7 @@
 endfunction
 
 function Test_get_buf_options()
-  let opts = getbufvar(bufnr('%'), '&')
+  let opts = bufnr()->getbufvar('&')
   call assert_equal(v:t_dict, type(opts))
   call assert_equal(8, opts.tabstop)
 endfunc
diff --git a/src/testdir/test_cd.vim b/src/testdir/test_cd.vim
index e0dedfb..c3589b4 100644
--- a/src/testdir/test_cd.vim
+++ b/src/testdir/test_cd.vim
@@ -83,7 +83,7 @@
   tabfirst
   call chdir('..')
   call assert_equal('y', fnamemodify(getcwd(1, 2), ':t'))
-  call assert_equal('z', fnamemodify(getcwd(3, 2), ':t'))
+  call assert_equal('z', fnamemodify(3->getcwd(2), ':t'))
   tabnext | wincmd t
   eval '..'->chdir()
   call assert_equal('Xdir', fnamemodify(getcwd(1, 2), ':t'))
diff --git a/src/testdir/test_changelist.vim b/src/testdir/test_changelist.vim
index dd6ea96..ce77c1f 100644
--- a/src/testdir/test_changelist.vim
+++ b/src/testdir/test_changelist.vim
@@ -8,8 +8,8 @@
 
   bwipe!
   enew
-  call assert_equal([], getchangelist(10))
-  call assert_equal([[], 0], getchangelist('%'))
+  call assert_equal([], 10->getchangelist())
+  call assert_equal([[], 0], getchangelist())
 
   call writefile(['line1', 'line2', 'line3'], 'Xfile1.txt')
   call writefile(['line1', 'line2', 'line3'], 'Xfile2.txt')
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index f0d83c6..6ed7848 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -209,7 +209,7 @@
   endif
   let groupcount = len(getcompletion('', 'event'))
   call assert_true(groupcount > 0)
-  let matchcount = len(getcompletion('File', 'event'))
+  let matchcount = len('File'->getcompletion('event'))
   call assert_true(matchcount > 0)
   call assert_true(groupcount > matchcount)
 
diff --git a/src/testdir/test_edit.vim b/src/testdir/test_edit.vim
index 32569b6..799642d 100644
--- a/src/testdir/test_edit.vim
+++ b/src/testdir/test_edit.vim
@@ -199,11 +199,11 @@
   endfu
   au InsertCharPre <buffer> :call DoIt()
   call feedkeys("A\<f5>\<c-p>u\<cr>\<c-l>\<cr>", 'tx')
-  call assert_equal(["Jan\<c-l>",''], getline(1,'$'))
+  call assert_equal(["Jan\<c-l>",''], 1->getline('$'))
   %d
   call setline(1, 'J')
   call feedkeys("A\<f5>\<c-p>u\<down>\<c-l>\<cr>", 'tx')
-  call assert_equal(["January"], getline(1,'$'))
+  call assert_equal(["January"], 1->getline('$'))
 
   delfu ListMonths
   delfu DoIt
@@ -345,7 +345,7 @@
   call cursor(2, 4)
   call feedkeys("R^\<c-d>", 'tnix')
   call assert_equal(["\tabc", "def"], getline(1, '$'))
-  call assert_equal([0, 2, 2, 0], getpos('.'))
+  call assert_equal([0, 2, 2, 0], '.'->getpos())
   %d
   call setline(1, ["\tabc", "\t\tdef"])
   call cursor(2, 2)
diff --git a/src/testdir/test_environ.vim b/src/testdir/test_environ.vim
index 21bb09a..ba61b17 100644
--- a/src/testdir/test_environ.vim
+++ b/src/testdir/test_environ.vim
@@ -11,7 +11,7 @@
 
 func Test_getenv()
   unlet! $TESTENV
-  call assert_equal(v:null, getenv('TESTENV'))
+  call assert_equal(v:null, 'TESTENV'->getenv())
   let $TESTENV = 'foo'
   call assert_equal('foo', getenv('TESTENV'))
 endfunc
diff --git a/src/testdir/test_file_perm.vim b/src/testdir/test_file_perm.vim
index 0dba6a7..3950168 100644
--- a/src/testdir/test_file_perm.vim
+++ b/src/testdir/test_file_perm.vim
@@ -2,10 +2,10 @@
 
 func Test_file_perm()
   call assert_equal('', getfperm('Xtest'))
-  call assert_equal(0, setfperm('Xtest', 'r--------'))
+  call assert_equal(0, 'Xtest'->setfperm('r--------'))
 
   call writefile(['one'], 'Xtest')
-  call assert_true(len(getfperm('Xtest')) == 9)
+  call assert_true(len('Xtest'->getfperm()) == 9)
 
   call assert_equal(1, setfperm('Xtest', 'rwx------'))
   if has('win32')
diff --git a/src/testdir/test_getvar.vim b/src/testdir/test_getvar.vim
index 3b61d68..e9868c7 100644
--- a/src/testdir/test_getvar.vim
+++ b/src/testdir/test_getvar.vim
@@ -31,7 +31,7 @@
   let t:other = 777
   let def_list = [4, 5, 6, 7]
   tabrewind
-  call assert_equal([1, 2, 3], gettabvar(3, 'var_list'))
+  call assert_equal([1, 2, 3], 3->gettabvar('var_list'))
   call assert_equal([1, 2, 3], gettabvar(3, 'var_list', def_list))
   call assert_equal({'var_list': [1, 2, 3], 'other': 777}, gettabvar(3, ''))
   call assert_equal({'var_list': [1, 2, 3], 'other': 777},
@@ -61,7 +61,7 @@
   let def_dict = {'dict2': 'newval'}
   wincmd b
   tabrewind
-  call assert_equal({'dict': 'tabwin'}, gettabwinvar(2, 3, 'var_dict'))
+  call assert_equal({'dict': 'tabwin'}, 2->gettabwinvar(3, 'var_dict'))
   call assert_equal({'dict': 'tabwin'},
 				\ gettabwinvar(2, 3, 'var_dict', def_dict))
   call assert_equal({'var_dict': {'dict': 'tabwin'}}, gettabwinvar(2, 3, ''))
diff --git a/src/testdir/test_jumplist.vim b/src/testdir/test_jumplist.vim
index be1af5e..9cfbbe2 100644
--- a/src/testdir/test_jumplist.vim
+++ b/src/testdir/test_jumplist.vim
@@ -39,7 +39,7 @@
   " Traverse the jump list and verify the results
   5
   exe "normal \<C-O>"
-  call assert_equal(2, getjumplist(1)[1])
+  call assert_equal(2, 1->getjumplist()[1])
   exe "normal 2\<C-O>"
   call assert_equal(0, getjumplist(1, 1)[1])
   exe "normal 3\<C-I>"
diff --git a/src/testdir/test_put.vim b/src/testdir/test_put.vim
index 80d2a26..afe82f9 100644
--- a/src/testdir/test_put.vim
+++ b/src/testdir/test_put.vim
@@ -22,7 +22,7 @@
 
 func Test_put_char_block2()
   new
-  let a = [ getreg('a'), getregtype('a') ]
+  let a = [ 'a'->getreg(), 'a'->getregtype() ]
   call setreg('a', ' one ', 'v')
   call setline(1, ['Line 1', '', 'Line 3', ''])
   " visually select the first 3 lines and put register a over it
diff --git a/src/testdir/test_stat.vim b/src/testdir/test_stat.vim
index e48e887..8ec2a42 100644
--- a/src/testdir/test_stat.vim
+++ b/src/testdir/test_stat.vim
@@ -10,7 +10,7 @@
   let fl = ['Hello World!']
   for fname in fnames
     call writefile(fl, fname)
-    call add(times, getftime(fname))
+    call add(times, fname->getftime())
     if a:doSleep
       sleep 1
     endif
@@ -19,8 +19,8 @@
   let time_correct = (times[0] <= times[1] && times[1] <= times[2])
   if a:doSleep || time_correct
     call assert_true(time_correct, printf('Expected %s <= %s <= %s', times[0], times[1], times[2]))
-    call assert_equal(strlen(fl[0] . "\n"), getfsize(fnames[0]))
-    call assert_equal('file', getftype(fnames[0]))
+    call assert_equal(strlen(fl[0] . "\n"), fnames[0]->getfsize())
+    call assert_equal('file', fnames[0]->getftype())
     call assert_equal('rw-', getfperm(fnames[0])[0:2])
     let result = 1
   endif