diff -up pyqtgraph-0.9.10/tools/setupHelpers.py.pytestpath pyqtgraph-0.9.10/tools/setupHelpers.py
--- pyqtgraph-0.9.10/tools/setupHelpers.py.pytestpath	2014-12-24 14:34:58.000000000 -0500
+++ pyqtgraph-0.9.10/tools/setupHelpers.py	2015-08-04 00:12:40.676570620 -0400
@@ -233,7 +233,7 @@ def unitTests():
     """
     try:
         if sys.version[0] == '3':
-            out = check_output('PYTHONPATH=. py.test-3', shell=True)
+            out = check_output('PYTHONPATH=. py.test-3.4', shell=True)
         else:
             out = check_output('PYTHONPATH=. py.test', shell=True)
         ret = 0