diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index d5ce5f0..fc22bcd 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -400,10 +400,10 @@
 func Test_pathshorten()
   call assert_equal('', pathshorten(''))
   call assert_equal('foo', pathshorten('foo'))
-  call assert_equal('/foo', pathshorten('/foo'))
+  call assert_equal('/foo', '/foo'->pathshorten())
   call assert_equal('f/', pathshorten('foo/'))
   call assert_equal('f/bar', pathshorten('foo/bar'))
-  call assert_equal('f/b/foobar', pathshorten('foo/bar/foobar'))
+  call assert_equal('f/b/foobar', 'foo/bar/foobar'->pathshorten())
   call assert_equal('/f/b/foobar', pathshorten('/foo/bar/foobar'))
   call assert_equal('.f/bar', pathshorten('.foo/bar'))
   call assert_equal('~f/bar', pathshorten('~foo/bar'))
@@ -847,21 +847,21 @@
   call assert_equal(0, nextnonblank(-1))
   call assert_equal(0, nextnonblank(0))
   call assert_equal(1, nextnonblank(1))
-  call assert_equal(4, nextnonblank(2))
+  call assert_equal(4, 2->nextnonblank())
   call assert_equal(4, nextnonblank(3))
   call assert_equal(4, nextnonblank(4))
   call assert_equal(6, nextnonblank(5))
   call assert_equal(6, nextnonblank(6))
   call assert_equal(7, nextnonblank(7))
-  call assert_equal(0, nextnonblank(8))
+  call assert_equal(0, 8->nextnonblank())
 
   call assert_equal(0, prevnonblank(-1))
   call assert_equal(0, prevnonblank(0))
-  call assert_equal(1, prevnonblank(1))
+  call assert_equal(1, 1->prevnonblank())
   call assert_equal(1, prevnonblank(2))
   call assert_equal(1, prevnonblank(3))
   call assert_equal(4, prevnonblank(4))
-  call assert_equal(4, prevnonblank(5))
+  call assert_equal(4, 5->prevnonblank())
   call assert_equal(6, prevnonblank(6))
   call assert_equal(7, prevnonblank(7))
   call assert_equal(0, prevnonblank(8))
@@ -1220,7 +1220,7 @@
   call assert_equal("a", trim("a", ""))
   call assert_equal("", trim("", "a"))
 
-  let chars = join(map(range(1, 0x20) + [0xa0], {n -> nr2char(n)}), '')
+  let chars = join(map(range(1, 0x20) + [0xa0], {n -> n->nr2char()}), '')
   call assert_equal("x", trim(chars . "x" . chars))
 endfunc