diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 0f287841da5..50dbbfa184f 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -1206,7 +1206,7 @@ class ObjCLanguage(object):
         out.append(
             self.config.job_spec(
                 ['test/cpp/ios/build_and_run_tests.sh'],
-                timeout_seconds=20 * 60,
+                timeout_seconds=30 * 60,
                 shortname='ios-cpp-test-cronet',
                 cpu_cost=1e6,
                 environ=_FORCE_ENVIRON_FOR_WRAPPERS))