diff --git a/src/testdir/test55.in b/src/testdir/test55.in
index 46a857b..e25d6ca 100644
--- a/src/testdir/test55.in
+++ b/src/testdir/test55.in
@@ -266,6 +266,15 @@
 :$put =string(reverse(sort(l)))
 :$put =string(sort(reverse(sort(l))))
 :"
+:" splitting a string to a List
+:$put =string(split('  aa  bb '))
+:$put =string(split('  aa  bb  ', '\W\+', 0))
+:$put =string(split('  aa  bb  ', '\W\+', 1))
+:$put =string(split('  aa  bb  ', '\W', 1))
+:$put =string(split(':aa::bb:', ':', 0))
+:$put =string(split(':aa::bb:', ':', 1))
+:$put =string(split('aa,,bb, cc,', ',\s*', 1))
+:"
 :endfun
 :call Test(1, 2, [3, 4], {5: 6})  " This may take a while
 :"