diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 97f7d5c..48ee1c4 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -81,6 +81,10 @@
 endfunc
 
 func Check_123(buf)
+  let l = term_scrape(a:buf, 0)
+  call assert_true(len(l) == 0)
+  let l = term_scrape(a:buf, 999)
+  call assert_true(len(l) == 0)
   let l = term_scrape(a:buf, 1)
   call assert_true(len(l) > 0)
   call assert_equal('1', l[0].chars)
@@ -93,6 +97,12 @@
     call assert_equal('#000000', l[0].bg)
   endif
 
+  let l = term_getline(a:buf, -1)
+  call assert_equal('', l)
+  let l = term_getline(a:buf, 0)
+  call assert_equal('', l)
+  let l = term_getline(a:buf, 999)
+  call assert_equal('', l)
   let l = term_getline(a:buf, 1)
   call assert_equal('123', l)
 endfunc