diff --git a/src/nvim/testdir/test100.in b/src/nvim/testdir/test100.in
index f9f5f9119f..f6d2e3711b 100644
--- a/src/nvim/testdir/test100.in
+++ b/src/nvim/testdir/test100.in
@@ -18,6 +18,7 @@ STARTTEST
 :call FillBuffer()
 :call feedkeys(":earlier 10\n", 't')
 :call UndoLevel()
+:set ft=unix
 :%w! test.out
 :new two
 :0put ='TWO: expecting global undolevels: 5, local undolevels: 2 (first) then 10 (afterwards)'
@@ -27,6 +28,7 @@ STARTTEST
 :call UndoLevel()
 :setlocal ul=10
 :call UndoLevel()
+:set ft=unix
 :%w >> test.out
 :wincmd p
 :redir >>test.out | echo "global value shouldn't be changed and still be 5!" | echo 'ONE: expecting global undolevels: 5, local undolevels: -123456 (default)'|:setglobal undolevels? | echon ' global' | setlocal undolevels? | echon ' local' |echo "" |redir end
@@ -35,6 +37,7 @@ STARTTEST
 :1put ='global value should be changed to 50'
 :2put ='THREE: expecting global undolevels: 50, local undolevels: -123456 (default)'
 :call UndoLevel()
+:set ft=unix
 :%w >> test.out
 :"sleep 10
 :"
diff --git a/src/nvim/testdir/test72.in b/src/nvim/testdir/test72.in
index 0821764c3c..4700d86981 100644
--- a/src/nvim/testdir/test72.in
+++ b/src/nvim/testdir/test72.in
@@ -8,6 +8,7 @@ STARTTEST
 :" Test 'undofile': first a simple one-line change.
 :set nocompatible viminfo+=nviminfo visualbell
 :set ul=100 undofile nomore
+:set ft=unix
 :e! Xtestfile
 ggdGithis is one line:set ul=100
 :s/one/ONE/
diff --git a/src/nvim/version.c b/src/nvim/version.c
index fbb2b081dd..6d01c8b2e4 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -226,7 +226,7 @@ static int included_patches[] = {
   //409 NA
   408,
   407,
-  //406,
+  406,
   405,
   //404 NA
   //403 NA