diff --git a/scripts/vim-patch.sh b/scripts/vim-patch.sh
index 5ebb6a38b3..4f6bb40488 100755
--- a/scripts/vim-patch.sh
+++ b/scripts/vim-patch.sh
@@ -133,7 +133,7 @@ preprocess_patch() {
 
   # Remove *.proto, Make*, gui_*, some if_*
   local na_src='proto\|Make*\|gui_*\|if_lua\|if_mzsch\|if_olepp\|if_ole\|if_perl\|if_py\|if_ruby\|if_tcl\|if_xcmdsrv'
-  2>/dev/null $nvim --cmd 'set dir=/tmp' +'g@^diff --git a/src/\S*\<\%('${na_src}'\)@norm! d/\v(^diff)|%$
' +w +q "$file"
+  2>/dev/null $nvim --cmd 'set dir=/tmp' +'g@^diff --git a/src/\S*\<\%(testdir/\)\@<!\%('${na_src}'\)@norm! d/\v(^diff)|%$
' +w +q "$file"
 
   # Remove channel.txt, netbeans.txt, os_*.txt, term.txt, todo.txt, version*.txt, tags
   local na_doc='channel\.txt\|netbeans\.txt\|os_\w\+\.txt\|term\.txt\|todo\.txt\|version\d\.txt\|tags'
diff --git a/src/nvim/testdir/Makefile b/src/nvim/testdir/Makefile
index 9133bfc0a2..38caa8815d 100644
--- a/src/nvim/testdir/Makefile
+++ b/src/nvim/testdir/Makefile
@@ -59,6 +59,7 @@ NEW_TESTS ?= \
 	    test_matchadd_conceal.res \
 	    test_matchadd_conceal_utf8.res \
 	    test_mksession.res \
+	    test_mksession_utf8.res \
 	    test_nested_function.res \
 	    test_normal.res \
 	    test_quickfix.res \