diff --git a/.travis.yml b/.travis.yml
index 1d6d61de0..158657eb9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -36,7 +36,7 @@ matrix:
 
       # Test Bazel build
       - rm -rf build
-      - ./ci/travis/install-bazel.sh
+      - ./ci/suppress_output ./ci/travis/install-bazel.sh
       - bazel build ...
 
     - os: linux
@@ -84,10 +84,10 @@ matrix:
         - sudo apt-get update -qq
         - sudo apt-get install -qq valgrind
       install:
-        - ./ci/travis/install-bazel.sh
-        - ./ci/travis/install-dependencies.sh
+        - ./ci/suppress_output ./ci/travis/install-bazel.sh
+        - ./ci/suppress_output ./ci/travis/install-dependencies.sh
         - export PATH="$HOME/miniconda/bin:$PATH"
-        - ./ci/travis/install-ray.sh
+        - ./ci/suppress_output ./ci/travis/install-ray.sh
 
       script:
         - bash src/ray/test/run_object_manager_valgrind.sh
@@ -98,11 +98,11 @@ matrix:
         # - export RAY_REDIS_SERVER_VALGRIND=1
 
         # # Python3.5+ only. Otherwise we will get `SyntaxError` regardless of how we set the tester.
-        - python -c 'import sys;exit(sys.version_info>=(3,5))' || python -m pytest -v --durations=10 python/ray/experimental/test/async_test.py
-        - python -m pytest -v --durations=10 python/ray/tests/test_mini.py
-        - python -m pytest -v --durations=10 python/ray/tests/test_array.py
-        - python -m pytest -v --durations=10 python/ray/tests/test_multi_node_2.py
-        - python -m pytest -v --durations=10 python/ray/tests/test_node_manager.py
+        - python -c 'import sys;exit(sys.version_info>=(3,5))' || python -m pytest --durations=5 python/ray/experimental/test/async_test.py
+        - python -m pytest --durations=5 python/ray/tests/test_mini.py
+        - python -m pytest --durations=5 python/ray/tests/test_array.py
+        - python -m pytest --durations=5 python/ray/tests/test_multi_node_2.py
+        - python -m pytest --durations=5 python/ray/tests/test_node_manager.py
 
 
     # Build Linux wheels.
@@ -138,16 +138,16 @@ matrix:
 
 
 install:
-  - ./ci/travis/install-bazel.sh
-  - ./ci/travis/install-dependencies.sh
+  - ./ci/suppress_output ./ci/travis/install-bazel.sh
+  - ./ci/suppress_output ./ci/travis/install-dependencies.sh
   - export PATH="$HOME/miniconda/bin:$PATH"
-  - ./ci/travis/install-ray.sh
-  - ./ci/travis/install-cython-examples.sh
+  - ./ci/suppress_output ./ci/travis/install-ray.sh
+  - ./ci/suppress_output ./ci/travis/install-cython-examples.sh
 
-  - bash src/ray/test/run_gcs_tests.sh
+  - ./ci/suppress_output bash src/ray/test/run_gcs_tests.sh
   # Raylet tests.
-  - bash src/ray/test/run_object_manager_tests.sh
-  - bazel test --build_tests_only --test_lang_filters=cc ... -c opt
+  - ./ci/suppress_output bash src/ray/test/run_object_manager_tests.sh
+  - ./ci/suppress_output bazel test --build_tests_only --test_lang_filters=cc ... -c opt
 
 
 script:
@@ -159,20 +159,20 @@ script:
   # - export PYTHONPATH="$PYTHONPATH:./ci/"
 
   # ray tune tests
-  - python python/ray/tune/tests/test_dependency.py
+  - ./ci/suppress_output python python/ray/tune/tests/test_dependency.py
   # `cluster_tests.py` runs on Jenkins, not Travis.
-  - python -m pytest -v --durations=30 --ignore=python/ray/tune/tests/test_cluster.py python/ray/tune/tests
+  - python -m pytest --durations=10 --ignore=python/ray/tune/tests/test_cluster.py python/ray/tune/tests
 
   # ray rllib tests
-  - python python/ray/rllib/tests/test_catalog.py
-  - python python/ray/rllib/tests/test_filters.py
-  - python python/ray/rllib/tests/test_optimizers.py
-  - python python/ray/rllib/tests/test_evaluators.py
+  - python/ray/rllib/tests/run_silent.sh tests/test_catalog.py
+  - python/ray/rllib/tests/run_silent.sh tests/test_filters.py
+  - python/ray/rllib/tests/run_silent.sh tests/test_optimizers.py
+  - python/ray/rllib/tests/run_silent.sh tests/test_evaluators.py
 
   # ray tests
   # Python3.5+ only. Otherwise we will get `SyntaxError` regardless of how we set the tester.
-  - python -c 'import sys;exit(sys.version_info>=(3,5))' || python -m pytest -v --durations=10 python/ray/experimental/test/async_test.py
-  - python -m pytest -v --durations=30 python/ray/tests
+  - python -c 'import sys;exit(sys.version_info>=(3,5))' || python -m pytest --durations=5 python/ray/experimental/test/async_test.py
+  - python -m pytest --durations=10 python/ray/tests
 deploy:
   - provider: s3
     access_key_id: AKIAJ2L7XDUSZVTXI5QA
diff --git a/ci/jenkins_tests/run_multi_node_tests.sh b/ci/jenkins_tests/run_multi_node_tests.sh
index 10da4f03b..263c2343d 100755
--- a/ci/jenkins_tests/run_multi_node_tests.sh
+++ b/ci/jenkins_tests/run_multi_node_tests.sh
@@ -12,6 +12,7 @@ SHM_SIZE="20G"
 ROOT_DIR=$(cd "$(dirname "${BASH_SOURCE:-$0}")"; pwd)
 
 DOCKER_SHA=$($ROOT_DIR/../../build-docker.sh --output-sha --no-cache)
+SUPPRESS_OUTPUT=$ROOT_DIR/../suppress_output
 echo "Using Docker image" $DOCKER_SHA
 
 ######################## RLLIB TESTS #################################
@@ -24,39 +25,39 @@ bash $ROOT_DIR/run_tune_tests.sh ${MEMORY_SIZE} ${SHM_SIZE} $DOCKER_SHA
 
 ######################## SGD TESTS #################################
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/experimental/sgd/test_sgd.py --num-iters=2 \
         --batch-size=1 --strategy=simple
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/experimental/sgd/test_sgd.py --num-iters=2 \
         --batch-size=1 --strategy=ps
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/experimental/sgd/test_save_and_restore.py --num-iters=2 \
         --batch-size=1 --strategy=simple
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/experimental/sgd/test_save_and_restore.py --num-iters=2 \
         --batch-size=1 --strategy=ps
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/experimental/sgd/mnist_example.py --num-iters=1 \
         --num-workers=1 --devices-per-worker=1 --strategy=ps
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/experimental/sgd/mnist_example.py --num-iters=1 \
         --num-workers=1 --devices-per-worker=1 --strategy=ps --tune
 
 ######################## RAY BACKEND TESTS #################################
 
-python3 $ROOT_DIR/multi_node_docker_test.py \
+$SUPPRESS_OUTPUT python3 $ROOT_DIR/multi_node_docker_test.py \
     --docker-image=$DOCKER_SHA \
     --num-nodes=5 \
     --num-redis-shards=10 \
     --test-script=/ray/ci/jenkins_tests/multi_node_tests/test_0.py
 
-python3 $ROOT_DIR/multi_node_docker_test.py \
+$SUPPRESS_OUTPUT python3 $ROOT_DIR/multi_node_docker_test.py \
     --docker-image=$DOCKER_SHA \
     --num-nodes=5 \
     --num-redis-shards=5 \
@@ -65,7 +66,7 @@ python3 $ROOT_DIR/multi_node_docker_test.py \
     --driver-locations=0,1,0,1,2,3,4 \
     --test-script=/ray/ci/jenkins_tests/multi_node_tests/remove_driver_test.py
 
-python3 $ROOT_DIR/multi_node_docker_test.py \
+$SUPPRESS_OUTPUT python3 $ROOT_DIR/multi_node_docker_test.py \
     --docker-image=$DOCKER_SHA \
     --num-nodes=5 \
     --num-redis-shards=2 \
@@ -73,7 +74,7 @@ python3 $ROOT_DIR/multi_node_docker_test.py \
     --num-drivers=100 \
     --test-script=/ray/ci/jenkins_tests/multi_node_tests/many_drivers_test.py
 
-python3 $ROOT_DIR/multi_node_docker_test.py \
+$SUPPRESS_OUTPUT python3 $ROOT_DIR/multi_node_docker_test.py \
     --docker-image=$DOCKER_SHA \
     --num-nodes=1 \
     --mem-size=60G \
diff --git a/ci/jenkins_tests/run_tune_tests.sh b/ci/jenkins_tests/run_tune_tests.sh
index e70cd60d5..6e8e63aa6 100755
--- a/ci/jenkins_tests/run_tune_tests.sh
+++ b/ci/jenkins_tests/run_tune_tests.sh
@@ -11,6 +11,7 @@ SHM_SIZE=$2
 DOCKER_SHA=$3
 
 ROOT_DIR=$(cd "$(dirname "${BASH_SOURCE:-$0}")"; pwd)
+SUPPRESS_OUTPUT=$ROOT_DIR/../suppress_output
 
 if [ "$MEMORY_SIZE" == "" ]; then
     MEMORY_SIZE="20G"
@@ -30,46 +31,46 @@ fi
 
 echo "Using Docker image" $DOCKER_SHA
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     pytest /ray/python/ray/tune/tests/test_cluster.py
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/tune_mnist_ray.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/pbt_example.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/hyperband_example.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/async_hyperband_example.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/tune_mnist_ray_hyperband.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/tune_mnist_async_hyperband.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/logging_example.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/bayesopt_example.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/hyperopt_example.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} -e SIGOPT_KEY $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} -e SIGOPT_KEY $DOCKER_SHA \
     python /ray/python/ray/tune/examples/sigopt_example.py \
     --smoke-test
 
@@ -78,21 +79,21 @@ docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} -e SIGOPT_KEY $DO
 #     python3 /ray/python/ray/tune/examples/nevergrad_example.py \
 #     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/tune_mnist_keras.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/mnist_pytorch.py --smoke-test --no-cuda
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/mnist_pytorch_trainable.py \
     --smoke-test --no-cuda
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/genetic_example.py \
     --smoke-test
 
-docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
+$SUPPRESS_OUTPUT docker run --rm --shm-size=${SHM_SIZE} --memory=${MEMORY_SIZE} $DOCKER_SHA \
     python /ray/python/ray/tune/examples/skopt_example.py \
     --smoke-test
diff --git a/ci/suppress_output b/ci/suppress_output
new file mode 100755
index 000000000..18652d1ec
--- /dev/null
+++ b/ci/suppress_output
@@ -0,0 +1,34 @@
+#!/bin/bash
+# Run a command, suppressing output unless it hangs or crashes.
+
+TMPFILE=`mktemp`
+COMMAND="$@"
+PID=$$
+
+# Print output to avoid travis killing us
+watchdog() {
+    for i in `seq 5 5 120`; do
+        sleep 300
+        echo "This command has been running for more than $i minutes..."
+    done
+    echo "Command timed out after 2h, dumping logs:"
+    cat $TMPFILE
+    echo "TIMED OUT"
+    kill -SIGKILL $PID
+}
+
+watchdog & 2>/dev/null
+WATCHDOG_PID=$!
+
+time $COMMAND >$TMPFILE 2>&1
+
+CODE=$?
+if [ $CODE != 0 ]; then
+    cat $TMPFILE
+    echo "FAILED $CODE"
+    kill $WATCHDOG_PID
+    exit $CODE
+fi
+
+kill $WATCHDOG_PID
+exit 0