diff --git a/build.yaml b/build.yaml
index 7229f2cd1b2cffcb45f6346d4a68e0298132625a..08c8c656e9b25d0d2ae92d997b1c0d139ddb662f 100644
--- a/build.yaml
+++ b/build.yaml
@@ -1121,7 +1121,7 @@ targets:
   - gpr_test_util
   - gpr
 - name: gpr_stack_lockfree_test
-  cpu_cost: 2
+  cpu_cost: 10
   build: test
   language: c
   src:
diff --git a/tools/run_tests/jobset.py b/tools/run_tests/jobset.py
index 4c2080f65699ab04e9885165d07d79f734b0d962..beeb99c0ae9fdbfb9c2807c10fb47ccc60013704 100755
--- a/tools/run_tests/jobset.py
+++ b/tools/run_tests/jobset.py
@@ -285,7 +285,7 @@ class Job(object):
           sys = float(m.group(3))
           if real > 0.5:
             cores = (user + sys) / real
-            measurement = '; cpu_cost=%.01f' % cores
+            measurement = '; cpu_cost=%.01f; estimated=%.01f' % (cores, self._spec.cpu_cost)
         message('PASSED', '%s [time=%.1fsec; retries=%d:%d%s]' % (
                     self._spec.shortname, elapsed, self._retries, self._timeout_retries, measurement),
             do_newline=self._newline_on_success or self._travis)
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index fd912ae94ac4dc0089fa25442bd8ed0baea30845..ce211219c4e847171589959ca8413428be427e5d 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -539,7 +539,7 @@
       "posix", 
       "windows"
     ], 
-    "cpu_cost": 2, 
+    "cpu_cost": 10, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c",