diff --git a/src/testdir/test_swap.vim b/src/testdir/test_swap.vim
new file mode 100644
index 0000000..245e1f1
--- /dev/null
+++ b/src/testdir/test_swap.vim
@@ -0,0 +1,48 @@
+" Tests for the swap feature
+
+" Tests for 'directory' option.
+func Test_swap_directory()
+  if !has("unix")
+    return
+  endif
+  let content = ['start of testfile',
+	      \ 'line 2 Abcdefghij',
+	      \ 'line 3 Abcdefghij',
+	      \ 'end of testfile']
+  call writefile(content, 'Xtest1')
+
+  "  '.', swap file in the same directory as file
+  set dir=.,~
+
+  " Verify that the swap file doesn't exist in the current directory
+  call assert_equal([], glob(".Xtest1*.swp", 1, 1, 1))
+  edit Xtest1
+  let swfname = split(execute("swapname"))[0]
+  call assert_equal([swfname], glob(swfname, 1, 1, 1))
+
+  " './dir', swap file in a directory relative to the file
+  set dir=./Xtest2,.,~
+
+  call mkdir("Xtest2")
+  edit Xtest1
+  call assert_equal([], glob(swfname, 1, 1, 1))
+  let swfname = "Xtest2/Xtest1.swp"
+  call assert_equal(swfname, split(execute("swapname"))[0])
+  call assert_equal([swfname], glob("Xtest2/*", 1, 1, 1))
+
+  " 'dir', swap file in directory relative to the current dir
+  set dir=Xtest.je,~
+
+  call mkdir("Xtest.je")
+  call writefile(content, 'Xtest2/Xtest3')
+  edit Xtest2/Xtest3
+  call assert_equal(["Xtest2/Xtest3"], glob("Xtest2/*", 1, 1, 1))
+  let swfname = "Xtest.je/Xtest3.swp"
+  call assert_equal(swfname, split(execute("swapname"))[0])
+  call assert_equal([swfname], glob("Xtest.je/*", 1, 1, 1))
+
+  set dir&
+  call delete("Xtest1")
+  call delete("Xtest2", "rf")
+  call delete("Xtest.je", "rf")
+endfunc