Properly cleanup tests.

Author: proofit404

test/pythonic-test.el

@@ -318,7 +318,8 @@ example) after we start pythonic process."
         (while (process-live-p process)
           (accept-process-output process))
         (find-file "/ssh:test@localhost:/home/test/x.py")
-        (should (get-buffer "x.py")))
+        (should (get-buffer "x.py"))
+        (kill-buffer "x.py"))
     (kill-buffer "*tramp/ssh test@localhost*")
     (setq tramp-current-connection)
     (sleep-for 0.5)))