diff --git a/src/testdir/Makefile b/src/testdir/Makefile
index fb35dcd..9901642 100644
--- a/src/testdir/Makefile
+++ b/src/testdir/Makefile
@@ -14,7 +14,7 @@
 		test38.out test39.out test40.out test41.out test42.out \
 		test43.out test44.out test45.out test46.out test47.out \
 		test48.out test49.out test51.out test52.out test53.out \
-		test54.out test55.out test56.out
+		test54.out test55.out test56.out test57.out
 
 SCRIPTS_GUI = test16.out
 
diff --git a/src/testdir/test55.in b/src/testdir/test55.in
index e25d6ca..5570c59 100644
--- a/src/testdir/test55.in
+++ b/src/testdir/test55.in
@@ -274,6 +274,8 @@
 :$put =string(split(':aa::bb:', ':', 0))
 :$put =string(split(':aa::bb:', ':', 1))
 :$put =string(split('aa,,bb, cc,', ',\s*', 1))
+:$put =string(split('abc', '\zs'))
+:$put =string(split('abc', '\zs', 1))
 :"
 :endfun
 :call Test(1, 2, [3, 4], {5: 6})  " This may take a while