diff --git a/.travis.yml b/.travis.yml
index 9964b6632a0defb1bba63568f0a0902452381c96..de40453b0672c181dbb488ec1dec32a6d965cc0a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,21 +17,21 @@ env:
     - CPPFLAGS=-I/tmp/prebuilt/include
     - NUGET="mono nuget.exe"
   matrix:
-    - CONFIG=opt TEST=sanity
-    - CONFIG=gcov TEST=c
-    - CONFIG=gcov TEST=c++
-    - CONFIG=opt TEST="c c++"
-    - CONFIG=opt TEST=node
-    - CONFIG=opt TEST=ruby
-    - CONFIG=opt TEST=python
-    - CONFIG=opt TEST=csharp
-    - USE_GCC=4.4 CONFIG=opt TEST=build
+    - CONFIG=opt TEST=sanity JOBS=1
+    - CONFIG=gcov TEST=c JOBS=16
+    - CONFIG=gcov TEST=c++ JOBS=16
+    - CONFIG=opt TEST="c c++" JOBS=16
+    - CONFIG=opt TEST=node JOBS=16
+    - CONFIG=opt TEST=ruby JOBS=16
+    - CONFIG=opt TEST=python JOBS=1
+    - CONFIG=opt TEST=csharp JOBS=16
+    - USE_GCC=4.4 CONFIG=opt TEST=build JOBS=16
 script:
   - rvm use $RUBY_VERSION
   - gem install bundler
   - ./tools/run_tests/prepare_travis.sh
   - if [ ! -z "$USE_GCC" ] ; then export CC=gcc-$USE_GCC ; export CXX=g++-$USE_GCC ; fi
-  - ./tools/run_tests/run_tests.py -l $TEST -t -j 16 -c $CONFIG -s 4.0
+  - ./tools/run_tests/run_tests.py -l $TEST -t -j $JOBS -c $CONFIG -s 4.0
 after_success:
   - if [ "$CONFIG" = "gcov" ] ; then coveralls --exclude third_party --exclude gens --exclude test --exclude src/compiler -b. --gcov-options '\-p' ; fi
 notifications:
diff --git a/src/python/src/grpc/_adapter/_face_test_case.py b/src/python/src/grpc/_adapter/_face_test_case.py
index 923e889844ddb99654a9e02120fc259e125626dc..5fa974ed06c094c57f9812b97bc5098993af9bbd 100644
--- a/src/python/src/grpc/_adapter/_face_test_case.py
+++ b/src/python/src/grpc/_adapter/_face_test_case.py
@@ -43,7 +43,7 @@ from grpc.framework.foundation import logging_pool
 
 _TIMEOUT = 3
 _MAXIMUM_TIMEOUT = 90
-_MAXIMUM_POOL_SIZE = 400
+_MAXIMUM_POOL_SIZE = 4
 
 
 class FaceTestCase(test_case.FaceTestCase, coverage.BlockingCoverage):
diff --git a/src/python/src/grpc/_adapter/_links_test.py b/src/python/src/grpc/_adapter/_links_test.py
index 4987be389a9cff003d8b62bef221e8d88737e55f..4fd76f60f8876b01bb78bc1cc19f69c0f9888972 100644
--- a/src/python/src/grpc/_adapter/_links_test.py
+++ b/src/python/src/grpc/_adapter/_links_test.py
@@ -54,8 +54,8 @@ def _transform_metadata(unused_metadata):
 class RoundTripTest(unittest.TestCase):
 
   def setUp(self):
-    self.fore_link_pool = logging_pool.pool(80)
-    self.rear_link_pool = logging_pool.pool(80)
+    self.fore_link_pool = logging_pool.pool(8)
+    self.rear_link_pool = logging_pool.pool(8)
 
   def tearDown(self):
     self.rear_link_pool.shutdown(wait=True)
diff --git a/src/python/src/grpc/_adapter/_lonely_rear_link_test.py b/src/python/src/grpc/_adapter/_lonely_rear_link_test.py
index 25799d679c70221265d709f26f5c2b3ddeb4515d..bdb1ee2379ef63f1eead9e528890582bc3cf30d0 100644
--- a/src/python/src/grpc/_adapter/_lonely_rear_link_test.py
+++ b/src/python/src/grpc/_adapter/_lonely_rear_link_test.py
@@ -43,7 +43,7 @@ _TIMEOUT = 2
 class LonelyRearLinkTest(unittest.TestCase):
 
   def setUp(self):
-    self.pool = logging_pool.pool(80)
+    self.pool = logging_pool.pool(8)
 
   def tearDown(self):
     self.pool.shutdown(wait=True)
diff --git a/src/python/src/grpc/_adapter/fore.py b/src/python/src/grpc/_adapter/fore.py
index 05016cdaf3130459c6291c656d08bb0e4060c8e1..69e145e3f61529acb78752a2c48cdae2b92d93f7 100644
--- a/src/python/src/grpc/_adapter/fore.py
+++ b/src/python/src/grpc/_adapter/fore.py
@@ -41,7 +41,7 @@ from grpc.framework.base import null
 from grpc.framework.foundation import activated
 from grpc.framework.foundation import logging_pool
 
-_THREAD_POOL_SIZE = 100
+_THREAD_POOL_SIZE = 10
 
 
 @enum.unique
diff --git a/src/python/src/grpc/_adapter/rear.py b/src/python/src/grpc/_adapter/rear.py
index dd0a486117fbfcec711ccaf4b7152b2951b575fd..b3b0b4ed32987db61a553eb7b50263c1cd86af42 100644
--- a/src/python/src/grpc/_adapter/rear.py
+++ b/src/python/src/grpc/_adapter/rear.py
@@ -41,7 +41,7 @@ from grpc.framework.base import null
 from grpc.framework.foundation import activated
 from grpc.framework.foundation import logging_pool
 
-_THREAD_POOL_SIZE = 100
+_THREAD_POOL_SIZE = 10
 
 _INVOCATION_EVENT_KINDS = (
     _low.Event.Kind.METADATA_ACCEPTED,
diff --git a/src/python/src/grpc/early_adopter/implementations.py b/src/python/src/grpc/early_adopter/implementations.py
index f3f2a043ebd6216edb44c70586507383667311ab..10919fae69f6fe914dcaed0a3a0c7d43ebe91666 100644
--- a/src/python/src/grpc/early_adopter/implementations.py
+++ b/src/python/src/grpc/early_adopter/implementations.py
@@ -41,7 +41,7 @@ from grpc.framework.base import util as _base_utilities
 from grpc.framework.face import implementations as _face_implementations
 from grpc.framework.foundation import logging_pool
 
-_THREAD_POOL_SIZE = 80
+_THREAD_POOL_SIZE = 8
 _ONE_DAY_IN_SECONDS = 24 * 60 * 60
 
 
diff --git a/src/python/src/grpc/framework/base/implementations_test.py b/src/python/src/grpc/framework/base/implementations_test.py
index 11e49caf756dc46363feeee86042cc69b5c66905..d40bb4d92eebfbde19c2552d62aa48156596fd68 100644
--- a/src/python/src/grpc/framework/base/implementations_test.py
+++ b/src/python/src/grpc/framework/base/implementations_test.py
@@ -36,7 +36,7 @@ from grpc.framework.base import interfaces_test_case
 from grpc.framework.base import util
 from grpc.framework.foundation import logging_pool
 
-POOL_MAX_WORKERS = 100
+POOL_MAX_WORKERS = 10
 DEFAULT_TIMEOUT = 30
 MAXIMUM_TIMEOUT = 60
 
diff --git a/src/python/src/grpc/framework/face/_test_case.py b/src/python/src/grpc/framework/face/_test_case.py
index b3a012db001ef44046ff13ee6247129f1bf7a62f..642d500628de084a2402a02695a86fbac3d52da0 100644
--- a/src/python/src/grpc/framework/face/_test_case.py
+++ b/src/python/src/grpc/framework/face/_test_case.py
@@ -35,7 +35,7 @@ from grpc.framework.face.testing import test_case
 from grpc.framework.foundation import logging_pool
 
 _TIMEOUT = 3
-_MAXIMUM_POOL_SIZE = 100
+_MAXIMUM_POOL_SIZE = 10
 
 
 class FaceTestCase(test_case.FaceTestCase):
diff --git a/src/python/src/grpc/framework/face/demonstration.py b/src/python/src/grpc/framework/face/demonstration.py
index eabeac4569763a115912ddbdf9a6ec294a1aa11d..f6b4b609ffe1e7e3fd78b6d0bed7fb562011b862 100644
--- a/src/python/src/grpc/framework/face/demonstration.py
+++ b/src/python/src/grpc/framework/face/demonstration.py
@@ -34,7 +34,7 @@ from grpc.framework.base import implementations as _base_implementations
 from grpc.framework.face import implementations
 from grpc.framework.foundation import logging_pool
 
-_POOL_SIZE_LIMIT = 20
+_POOL_SIZE_LIMIT = 5
 
 _MAXIMUM_TIMEOUT = 90
 
diff --git a/src/python/src/grpc/framework/face/testing/base_util.py b/src/python/src/grpc/framework/face/testing/base_util.py
index 151d0ef793ca6ee9a6e5c5cfad3e5e199027bb21..1df1529b27c009cb0718ec443153df00f01a6552 100644
--- a/src/python/src/grpc/framework/face/testing/base_util.py
+++ b/src/python/src/grpc/framework/face/testing/base_util.py
@@ -38,7 +38,7 @@ from grpc.framework.base import in_memory
 from grpc.framework.base import interfaces  # pylint: disable=unused-import
 from grpc.framework.foundation import logging_pool
 
-_POOL_SIZE_LIMIT = 20
+_POOL_SIZE_LIMIT = 5
 
 _MAXIMUM_TIMEOUT = 90
 
diff --git a/src/python/src/grpc/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py b/src/python/src/grpc/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
index 0d51b64f1b3b51f4ac0275b83967a68be9e57edf..21bf9a42486a651ad81734e4e18dea82192ca977 100644
--- a/src/python/src/grpc/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
+++ b/src/python/src/grpc/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
@@ -44,7 +44,7 @@ from grpc.framework.foundation import future
 from grpc.framework.foundation import logging_pool
 
 _TIMEOUT = 3
-_MAXIMUM_POOL_SIZE = 100
+_MAXIMUM_POOL_SIZE = 10
 
 
 class _PauseableIterator(object):