do not run compression level suite if args are given to runtest

diff --git a/runtests.py b/runtests.py
index 263d28b..fdbab7f 100755 (executable)
--- a/runtests.py
+++ b/runtests.py
@@ -18,6 +18,7 @@
 
 
 import unittest
+import sys
 
 from testing.test_crypto import HeaderTest, AESGCMTest
 from testing.test_multivol import MultivolGnuFormatTest, MultivolPaxFormatTest
@@ -95,7 +96,7 @@ from testing.test_compression_level import suite
 from testing.test_volume_size_accuracy import VolumeSizeAccuracyTest
 
 if __name__ == "__main__":
-    import sys
-    unittest.TextTestRunner().run(suite())
+    if len(sys.argv) == 1:
+        unittest.TextTestRunner().run(suite())
     unittest.main()