diff --git a/tests/testlib.py b/tests/testlib.py
index d4387c54..e26c6544 100644
--- a/tests/testlib.py
+++ b/tests/testlib.py
@@ -428,7 +428,7 @@ class DockerizedSshDaemon(object):
 
     def start_container(self):
         try:
-            subprocess__check_output(['docker'])
+            subprocess__check_output(['docker', '--version'])
         except Exception:
             raise unittest2.SkipTest('Docker binary is unavailable')