diff --git a/src/testdir/test20.in b/src/testdir/test20.in
new file mode 100644
index 0000000..7201c75
--- /dev/null
+++ b/src/testdir/test20.in
@@ -0,0 +1,22 @@
+Tests Blockwise Visual when there are TABs before the text.
+First test for undo working properly when executing commands from a register.
+Also test this in an empty buffer.
+
+STARTTEST
+:so tiny.vim
+G0"ay$k@au
+:new
+@auY:quit!
+GP
+/start here$
+jjlld
+:/here$/,$-1w! test.out
+:qa!
+ENDTEST
+
+test text test tex start here
+		some text
+		test text
+test text
+
+OxjAykdd