diff --git a/test/basetest/__init__.py b/test/basetest/__init__.py
index 4240e3314..7665f467c 100644
--- a/test/basetest/__init__.py
+++ b/test/basetest/__init__.py
@@ -83,7 +83,8 @@ class BaseTestCase(unittest.TestCase):
         """
         pass
 
-    def callTask(self, args, input=None, merge_streams=True):
+    @classmethod
+    def callTask(cls, args, input=None, merge_streams=True):
         """Invoke src/task with the given arguments
 
         Use callTaskSuccess or callTaskError if you want exit_code to be tested
@@ -122,7 +123,8 @@ class BaseTestCase(unittest.TestCase):
 
         return p.returncode, out, err
 
-    def callTaskSuccess(self, args, input=None, merge_streams=True):
+    @classmethod
+    def callTaskSuccess(cls, args, input=None, merge_streams=True):
         """Invoke src/task with the given arguments and expect a zero exit
         code.
         Causes test to fail if exit_code != 0
@@ -134,13 +136,14 @@ class BaseTestCase(unittest.TestCase):
 
         Returns (exit_code, stdout, stderr)
         """
-        out = self.callTask(args, input, merge_streams)
+        out = cls.callTask(args, input, merge_streams)
 
-        self.assertEqual(out[0], 0, "Task finished with non-zero ({0}) exit "
-            "code\nOUTPUT: {1}".format(out[0], out[1]))
+        assert out[0] == 0, ("Task finished with non-zero ({0}) exit code\n"
+                             "OUTPUT: {1}".format(out[0], out[1]))
         return out
 
-    def callTaskError(self, args, input=None, merge_streams=True):
+    @classmethod
+    def callTaskError(cls, args, input=None, merge_streams=True):
         """Invoke src/task with the given arguments and expect a non-zero exit
         code.
         Causes test to fail if exit_code == 0
@@ -152,9 +155,9 @@ class BaseTestCase(unittest.TestCase):
 
         Returns (exit_code, stdout, stderr)
         """
-        out = self.callTask(args, input, merge_streams)
+        out = cls.callTask(args, input, merge_streams)
 
-        self.assertNotEqual(out[0], 0, "Task finished with zero exit (0) code")
+        assert out[0] != 0, "Task finished with zero exit (0) code"
         return out