diff --git a/src/testdir/test_recover.vim b/src/testdir/test_recover.vim
new file mode 100644
index 0000000..aa291b1
--- /dev/null
+++ b/src/testdir/test_recover.vim
@@ -0,0 +1,14 @@
+" Test :recover
+
+func Test_recover_root_dir()
+  " This used to access invalid memory.
+  split Xtest
+  set dir=/
+  call assert_fails('recover', 'E305:')
+  close!
+
+  call assert_fails('split Xtest', 'E303:')
+  set dir&
+endfunc
+
+" TODO: move recover tests from test78.in to here.