--- a/testing/functional/test_restart.py
+++ b/testing/functional/test_restart.py
@@ -323,14 +323,7 @@ class RestartTestWithoutEncryption(RestartTest):
         https://launchpad.net/bugs/929067
         """

-        if platform.system().startswith('Linux'):
-            tarcmd = "tar"
-        elif platform.system().startswith('Darwin'):
-            tarcmd = "gtar"
-        elif platform.system().endswith('BSD'):
-            tarcmd = "gtar"
-        else:
-            raise Exception("Platform %s not supported by tar/gtar." % platform.platform())
+        tarcmd = "tar"

         # Intial normal backup
         self.backup("full", "testfiles/blocktartest")