diff --git a/src/testdir/test_arglist.vim b/src/testdir/test_arglist.vim
index daed3d4..c486b18 100644
--- a/src/testdir/test_arglist.vim
+++ b/src/testdir/test_arglist.vim
@@ -88,7 +88,7 @@
   argadd Xargadd
   call assert_equal(curbuf, bufnr('%'))
   call assert_equal('', bufname('%'))
-  call assert_equal(1, line('$'))
+  call assert_equal(1, '$'->line())
   rew
   call assert_notequal(curbuf, '%'->bufnr())
   call assert_equal('Xargadd', '%'->bufname())
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 2ffdc24..926713e 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -883,7 +883,7 @@
   call assert_equal([-1, -1, 1, 1, 2, 2, 2, 3, 3, -1],
   \                 map(range(-1, 8), 'v:val->byte2line()'))
   call assert_equal([-1, -1, 1, 3, 6, 8, -1],
-  \                 map(range(-1, 5), 'line2byte(v:val)'))
+  \                 map(range(-1, 5), 'v:val->line2byte()'))
 
   set fileformat=dos
   call assert_equal([-1, -1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, -1],
@@ -1351,17 +1351,17 @@
   endif
 
   if has('win32')
-    call assert_equal($USERPROFILE, libcall(libc, 'getenv', 'USERPROFILE'))
+    call assert_equal($USERPROFILE, 'USERPROFILE'->libcall(libc, 'getenv'))
   else
-    call assert_equal($HOME, libcall(libc, 'getenv', 'HOME'))
+    call assert_equal($HOME, 'HOME'->libcall(libc, 'getenv'))
   endif
 
   " If function returns NULL, libcall() should return an empty string.
   call assert_equal('', libcall(libc, 'getenv', 'X_ENV_DOES_NOT_EXIT'))
 
   " Test libcallnr() with string and integer argument.
-  call assert_equal(4, libcallnr(libc, 'strlen', 'abcd'))
-  call assert_equal(char2nr('A'), libcallnr(libc, 'toupper', char2nr('a')))
+  call assert_equal(4, 'abcd'->libcallnr(libc, 'strlen'))
+  call assert_equal(char2nr('A'), char2nr('a')->libcallnr(libc, 'toupper'))
 
   call assert_fails("call libcall(libc, 'Xdoesnotexist_', '')", 'E364:')
   call assert_fails("call libcallnr(libc, 'Xdoesnotexist_', '')", 'E364:')
diff --git a/src/testdir/test_json.vim b/src/testdir/test_json.vim
index 8f85a58..94481d9 100644
--- a/src/testdir/test_json.vim
+++ b/src/testdir/test_json.vim
@@ -70,7 +70,7 @@
 func Test_json_encode()
   call assert_equal(s:json1, json_encode(s:var1))
   call assert_equal(s:json2, json_encode(s:var2))
-  call assert_equal(s:json3, json_encode(s:var3))
+  call assert_equal(s:json3, s:var3->json_encode())
   call assert_equal(s:json4, json_encode(s:var4))
   call assert_equal(s:json5, json_encode(s:var5))
 
@@ -110,7 +110,7 @@
 func Test_json_decode()
   call assert_equal(s:var1, json_decode(s:json1))
   call assert_equal(s:var2, json_decode(s:json2))
-  call assert_equal(s:var3, json_decode(s:json3))
+  call assert_equal(s:var3, s:json3->json_decode())
   call assert_equal(s:var4, json_decode(s:json4))
   call assert_equal(s:var5, json_decode(s:json5))
 
@@ -188,7 +188,7 @@
 func Test_js_encode()
   call assert_equal(s:json1, js_encode(s:var1))
   call assert_equal(s:json2, js_encode(s:var2))
-  call assert_equal(s:json3, js_encode(s:var3))
+  call assert_equal(s:json3, s:var3->js_encode())
   call assert_equal(s:json4, js_encode(s:var4))
   call assert_equal(s:json5, js_encode(s:var5))
 
@@ -226,7 +226,7 @@
 func Test_js_decode()
   call assert_equal(s:var1, js_decode(s:json1))
   call assert_equal(s:var2, js_decode(s:json2))
-  call assert_equal(s:var3, js_decode(s:json3))
+  call assert_equal(s:var3, s:json3->js_decode())
   call assert_equal(s:var4, js_decode(s:json4))
   call assert_equal(s:var5, js_decode(s:json5))
 
diff --git a/src/testdir/test_lispwords.vim b/src/testdir/test_lispwords.vim
index 4c05504..aa5a738 100644
--- a/src/testdir/test_lispwords.vim
+++ b/src/testdir/test_lispwords.vim
@@ -43,6 +43,9 @@
 	      \ ',@body',
 	      \ '(princ "</a>")))'
 	      \ ])
+  call assert_equal(7, lispindent(2))
+  call assert_equal(5, 6->lispindent())
+
   set lisp
   set lispwords&
   let save_copt = &cpoptions
diff --git a/src/testdir/test_listener.vim b/src/testdir/test_listener.vim
index 6a68ae6..3aadeaa 100644
--- a/src/testdir/test_listener.vim
+++ b/src/testdir/test_listener.vim
@@ -59,10 +59,10 @@
   " a change above a previous change without a line number change is reported
   " together
   call setline(1, ['one one', 'two'])
-  call listener_flush()
+  call listener_flush(bufnr())
   call append(2, 'two two')
   call setline(1, 'something')
-  call listener_flush()
+  call bufnr()->listener_flush()
   call assert_equal([{'lnum': 3, 'end': 3, 'col': 1, 'added': 1},
 	\ {'lnum': 1, 'end': 2, 'col': 1, 'added': 0}], s:list)
 
@@ -134,7 +134,7 @@
   redraw
   call assert_equal([{'lnum': 1, 'end': 2, 'col': 1, 'added': 0}], s:list3)
 
-  call listener_remove(id)
+  eval id->listener_remove()
   bwipe!
 endfunc
 
@@ -214,7 +214,7 @@
   call setline(1, ['one', 'two'])
   let bufnr = bufnr('')
   normal ww
-  let id = listener_add(function('s:StoreBufList'), bufnr)
+  let id = bufnr->listener_add(function('s:StoreBufList'))
   let s:list = []
   call setbufline(bufnr, 1, 'hello')
   redraw
diff --git a/src/testdir/test_lua.vim b/src/testdir/test_lua.vim
index 65753dc..cb5b95d 100644
--- a/src/testdir/test_lua.vim
+++ b/src/testdir/test_lua.vim
@@ -36,7 +36,7 @@
 
   " lua.eval with a string
   lua v = vim.eval('"abc"')
-  call assert_equal('string', luaeval('vim.type(v)'))
+  call assert_equal('string', 'vim.type(v)'->luaeval())
   call assert_equal('abc', luaeval('v'))
 
   " lua.eval with a list
diff --git a/src/testdir/test_utf8.vim b/src/testdir/test_utf8.vim
index ab1616a..9470855 100644
--- a/src/testdir/test_utf8.vim
+++ b/src/testdir/test_utf8.vim
@@ -77,7 +77,7 @@
   let s = "\u304b\u3099\u3044"
   let l = [0x304b, 0x3099, 0x3044]
   call assert_equal(l, str2list(s, 1))
-  call assert_equal(s, list2str(l, 1))
+  call assert_equal(s, l->list2str(1))
   if &enc ==# 'utf-8'
     call assert_equal(str2list(s), str2list(s, 1))
     call assert_equal(list2str(l), list2str(l, 1))