diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index cb54c0db82c7294d3f0e6e3ac405ec23d391c2a5..f59bff2a8890303fe6cc37a335d8691211eb49c4 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -40,7 +40,7 @@ class ValgrindConfig(object):
     self.allow_hashing = False
 
   def job_spec(self, binary, hash_targets):
-    return JobSpec(cmdline=['valgrind', '--tool=%s' % self.tool, binary],
+    return jobset.JobSpec(cmdline=['valgrind', '--tool=%s' % self.tool, binary],
                    hash_targets=None)