diff --git a/tools/run_tests/jobset.py b/tools/run_tests/jobset.py
index aa3f4bfb4198fd751c0241e9b1f80819c3b3b9bb..538deac0e3eedab58d0c05a9688db85e6d36f5e3 100755
--- a/tools/run_tests/jobset.py
+++ b/tools/run_tests/jobset.py
@@ -131,7 +131,7 @@ class JobSpec(object):
   """Specifies what to run for a job."""
 
   def __init__(self, cmdline, shortname=None, environ=None, hash_targets=None,
-               cwd=None, shell=False, timeout_seconds=900):
+               cwd=None, shell=False, timeout_seconds=5*60):
     """
     Arguments:
       cmdline: a list of arguments to pass as the command line
diff --git a/tools/run_tests/run_interops.py b/tools/run_tests/run_interops.py
index 4e6b5ce2f68176cfb197463a71c488ecb7d55dc2..e1d40d32c1c84a2c349d8cf86ebaeaf9c78ac3be 100755
--- a/tools/run_tests/run_interops.py
+++ b/tools/run_tests/run_interops.py
@@ -15,7 +15,10 @@ _TESTS = ['large_unary', 'empty_unary', 'ping_pong', 'client_streaming', 'server
 jobs = []
 jobNumber = 0
 for test in _TESTS:
-  test_job = jobset.JobSpec(cmdline=['tools/run_tests/run_interops_test.sh', '%s' % args.language, '%s' % test], shortname=test)
+  test_job = jobset.JobSpec(
+        cmdline=['tools/run_tests/run_interops_test.sh', '%s' % args.language, '%s' % test], 
+        shortname=test,
+        timeout_seconds=15*60)
   jobs.append(test_job)
   jobNumber+=1
 
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 47d2b6183e1389d7342af863a5c9779a0ad920a8..1a6752c7845e2adac053b455303de6d6a7591988 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -470,7 +470,8 @@ else:
                            '-j', '%d' % (multiprocessing.cpu_count() + 1),
                            'EXTRA_DEFINES=GRPC_TEST_SLOWDOWN_MACHINE_FACTOR=%f' %
                                args.slowdown,
-                           'CONFIG=%s' % cfg] + targets)
+                           'CONFIG=%s' % cfg] + targets,
+                          timeout_seconds=30*60)
 
 build_steps = [make_jobspec(cfg,
                             list(set(itertools.chain.from_iterable(