patch 7.4.2033
Problem:    'cscopequickfix' option does not accept new value "a".
Solution:   Adjust list of command characters. (Ken Takata)
diff --git a/src/testdir/test_cscope.vim b/src/testdir/test_cscope.vim
new file mode 100644
index 0000000..b6d70f0
--- /dev/null
+++ b/src/testdir/test_cscope.vim
@@ -0,0 +1,15 @@
+" Test for cscope commands.
+
+if !has('cscope')
+  finish
+endif
+
+func Test_cscopequickfix()
+  set cscopequickfix=s-,g-,d+,c-,t+,e-,f0,i-,a-
+  call assert_equal('s-,g-,d+,c-,t+,e-,f0,i-,a-', &cscopequickfix)
+
+  call assert_fails('set cscopequickfix=x-', 'E474:')
+  call assert_fails('set cscopequickfix=s', 'E474:')
+  call assert_fails('set cscopequickfix=s7', 'E474:')
+  call assert_fails('set cscopequickfix=s-a', 'E474:')
+endfunc