diff --git a/test/run_tests.py b/test/run_tests.py
index be875117c..d1c414069 100755
--- a/test/run_tests.py
+++ b/test/run_tests.py
@@ -4,12 +4,14 @@
 
 import os
 import sys
+from os.path import abspath, dirname, join
 from subprocess import Popen, call
 from tempfile import TemporaryFile
 
 import env
 from run_unit_tests import run_unit_tests
 
+CURDIR = dirname(abspath(__file__))
 
 REBOT_ARGS = [
     '--outputdir', '%(outdir)s',
@@ -120,7 +122,8 @@ def _help():
 
 def _run_unit_tests():
     print('Running unit tests')
-    failures = run_unit_tests()
+    pypath = sys.executable
+    failures = call([pypath, os.path.join(CURDIR,'run_unit_tests.py')])
     if failures != 0:
         print('\n%d unit tests failed - not running acceptance tests!' % failures)
     else: