5 files changed, 48 insertions, 0 deletions
diff --git a/src/testdir/test_blob.vim b/src/testdir/test_blob.vim
index 3ce95756f..69c86963c 100644
--- a/src/testdir/test_blob.vim
+++ b/src/testdir/test_blob.vim
@@ -37,6 +37,7 @@ func Test_blob_create()
       call assert_fails('VAR b = 0z001122.')
       call assert_fails('call get("", 1)', 'E896:')
       call assert_equal(0, len(test_null_blob()))
+      call assert_equal(0z, copy(test_null_blob()))
   END
   call CheckLegacyAndVim9Success(lines)
 endfunc
@@ -369,6 +370,14 @@ func Test_blob_add()
       add(test_null_blob(), 0x22)
   END
   call CheckDefExecAndScriptFailure(lines, 'E1131:')
+
+  let lines =<< trim END
+      let b = 0zDEADBEEF
+      lockvar b
+      call add(b, 0)
+      unlockvar b
+  END
+  call CheckScriptFailure(lines, 'E741:')
 endfunc
 
 func Test_blob_empty()
@@ -445,6 +454,9 @@ func Test_blob_func_remove()
       remove(b, 0)
   END
   call CheckScriptFailure(lines, 'E741:')
+
+  call assert_fails('echo remove(0z1020, [])', 'E745:')
+  call assert_fails('echo remove(0z1020, 0, [])', 'E745:')
 endfunc
 
 func Test_blob_read_write()
@@ -474,6 +486,7 @@ func Test_blob_filter()
       call assert_equal(0zADEF, filter(0zDEADBEEF, 'v:key % 2'))
   END
   call CheckLegacyAndVim9Success(lines)
+  call assert_fails('echo filter(0z10, "a10")', 'E121:')
 endfunc
 
 " map() item in blob
@@ -489,6 +502,7 @@ func Test_blob_map()
       call map(0z00, '[9]')
   END
   call CheckLegacyAndVim9Failure(lines, 'E978:')
+  call assert_fails('echo map(0z10, "a10")', 'E121:')
 endfunc
 
 func Test_blob_index()
diff --git a/src/testdir/test_expr.vim b/src/testdir/test_expr.vim
index ba2e2597a..8a65a8990 100644
--- a/src/testdir/test_expr.vim
+++ b/src/testdir/test_expr.vim
@@ -405,6 +405,7 @@ func Test_printf_misc()
       call assert_equal('[00000あiう]', printf('[%010.7S]', 'あiう'))
 
       call assert_equal('1%', printf('%d%%', 1))
+      call assert_notequal('', printf('%p', "abc"))
   END
   call CheckLegacyAndVim9Success(lines)
 
diff --git a/src/testdir/test_filter_map.vim b/src/testdir/test_filter_map.vim
index 1767a9966..6cde45350 100644
--- a/src/testdir/test_filter_map.vim
+++ b/src/testdir/test_filter_map.vim
@@ -183,6 +183,7 @@ func Test_filter_map_string()
     call assert_equal('', map('', "v:val == 'a'"))
     call assert_equal('', map(test_null_string(), "v:val == 'a'"))
     call assert_fails('echo map("abc", "10")', 'E928:')
+    call assert_fails('echo map("abc", "a10")', 'E121:')
   END
   call CheckLegacyAndVim9Success(lines)
 
diff --git a/src/testdir/test_fold.vim b/src/testdir/test_fold.vim
index d35b7c807..e3b6b6e58 100644
--- a/src/testdir/test_fold.vim
+++ b/src/testdir/test_fold.vim
@@ -1408,4 +1408,35 @@ func Test_foldexpr_scriptlocal_func()
   bw!
 endfunc
 
+" Test for using a script-local function for 'foldtext'
+func Test_foldtext_scriptlocal_func()
+  func! s:FoldText()
+    let g:FoldTextArgs = [v:foldstart, v:foldend]
+    return foldtext()
+  endfunc
+  new | only
+  call setline(1, range(50))
+  let g:FoldTextArgs = []
+  set foldmethod=manual
+  set foldtext=s:FoldText()
+  norm! 4Gzf4j
+  redraw!
+  call assert_equal(expand('<SID>') .. 'FoldText()', &foldtext)
+  call assert_equal([4, 8], g:FoldTextArgs)
+  set foldtext&
+  bw!
+  new | only
+  call setline(1, range(50))
+  let g:FoldTextArgs = []
+  set foldmethod=manual
+  set foldtext=<SID>FoldText()
+  norm! 8Gzf4j
+  redraw!
+  call assert_equal(expand('<SID>') .. 'FoldText()', &foldtext)
+  call assert_equal([8, 12], g:FoldTextArgs)
+  set foldtext&
+  bw!
+  delfunc s:FoldText
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/testdir/test_listdict.vim b/src/testdir/test_listdict.vim
index e7b658878..fbb917b9b 100644
--- a/src/testdir/test_listdict.vim
+++ b/src/testdir/test_listdict.vim
@@ -1163,6 +1163,7 @@ func Test_listdict_extend()
 
   let d = {'a': 'A', 'b': 'B'}
   call assert_fails("call extend(d, {'b': 0, 'c':'C'}, 'error')", 'E737:')
+  call assert_fails("call extend(d, {'b': 0}, [])", 'E730:')
   call assert_fails("call extend(d, {'b': 0, 'c':'C'}, 'xxx')", 'E475:')
   if has('float')
     call assert_fails("call extend(d, {'b': 0, 'c':'C'}, 1.2)", 'E475:')