diff --git a/src/testdir/test17.in b/src/testdir/test17.in
index 3a0a9bb..59b57c2 100644
--- a/src/testdir/test17.in
+++ b/src/testdir/test17.in
@@ -9,13 +9,7 @@
 :else
 : set isfname=@,48-57,/,.,-,_,+,,,$,:,~,{,}
 :endif
-:function! DeleteDirectory(dir)
-: if has("win16") || has("win32") || has("win64") || has("dos16") || has("dos32")
-:  exec "silent !rmdir /Q /S " . a:dir
-: else
-:  exec "silent !rm -rf " . a:dir
-: endif
-:endfun
+:"
 :if has("unix")
 :let $CDIR = "."
 /CDIR
@@ -45,7 +39,7 @@
 :" check for 'include' without \zs or \ze
 :lang C
 :call delete("./Xbase.a")
-:call DeleteDirectory("Xdir1")
+:call delete("Xdir1", "rf")
 :!mkdir Xdir1
 :!mkdir "Xdir1/dir2"
 :e! Xdir1/dir2/foo.a
@@ -70,7 +64,7 @@
 STARTTEST
 :" check for 'include' with \zs and \ze
 :call delete("./Xbase.b")
-:call DeleteDirectory("Xdir1")
+:call delete("Xdir1", "rf")
 :!mkdir Xdir1
 :!mkdir "Xdir1/dir2"
 :let &include='^\s*%inc\s*/\zs[^/]\+\ze'
@@ -100,7 +94,7 @@
 STARTTEST
 :" check for 'include' with \zs and no \ze
 :call delete("./Xbase.c")
-:call DeleteDirectory("Xdir1")
+:call delete("Xdir1", "rf")
 :!mkdir Xdir1
 :!mkdir "Xdir1/dir2"
 :let &include='^\s*%inc\s*\%([[:upper:]][^[:space:]]*\s\+\)\?\zs\S\+\ze'
diff --git a/src/testdir/test73.in b/src/testdir/test73.in
index 666e4d2..a0b9ae8 100644
--- a/src/testdir/test73.in
+++ b/src/testdir/test73.in
@@ -9,16 +9,9 @@
 :set visualbell
 :set nocp viminfo+=nviminfo
 :"
-:function! DeleteDirectory(dir)
-: if has("win16") || has("win32") || has("win64") || has("dos16") || has("dos32")
-:  exec "silent !rmdir /Q /S " . a:dir
-: else
-:  exec "silent !rm -rf " . a:dir
-: endif
-:endfun
 :" On windows a stale "Xfind" directory may exist, remove it so that
 :" we start from a clean state.
-:call DeleteDirectory("Xfind")
+:call delete("Xfind", "rf")
 :new
 :let cwd=getcwd()
 :let test_out = cwd . '/test.out'
@@ -170,7 +163,7 @@
 :exec "w >>" . test_out
 :q
 :exec "cd " . cwd
-:call DeleteDirectory("Xfind")
+:call delete("Xfind", "rf")
 :qa!
 ENDTEST
 
diff --git a/src/testdir/test_getcwd.in b/src/testdir/test_getcwd.in
index 8c7b24e..e92ea1b 100644
--- a/src/testdir/test_getcwd.in
+++ b/src/testdir/test_getcwd.in
@@ -9,14 +9,6 @@
 :set visualbell
 :set nocp viminfo+=nviminfo
 :"
-:function! DeleteDirectory(dir)
-: if has("win16") || has("win32") || has("win64") || has("dos16") || has("dos32")
-:  exec "silent !rmdir /Q /S " . a:dir
-: else
-:  exec "silent !rm -rf " . a:dir
-: endif
-:endfun
-:"
 :function! GetCwdInfo(win, tab)
 : let tab_changed = 0
 : let mod = ":t"
@@ -42,7 +34,7 @@
 :endfunction
 :" On windows a stale "Xtopdir" directory may exist, remove it so that
 :" we start from a clean state.
-:call DeleteDirectory("Xtopdir")
+:call delete("Xtopdir", "rf")
 :let r=[]
 :new
 :let cwd=getcwd()
@@ -94,7 +86,7 @@
 :call writefile(r, test_out, "a")
 :q
 :exec "cd " . cwd
-:call DeleteDirectory("Xtopdir")
+:call delete("Xtopdir", "rf")
 :qa!
 ENDTEST
 
diff --git a/src/version.c b/src/version.c
index 9aba54c..ad79eff 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1910,
+/**/
     1909,
 /**/
     1908,