diff --git a/vendor/google.golang.org/grpc/.travis.yml b/vendor/google.golang.org/grpc/.travis.yml
index 024408e..87f40b8 100644
--- a/vendor/google.golang.org/grpc/.travis.yml
+++ b/vendor/google.golang.org/grpc/.travis.yml
@@ -2,18 +2,20 @@
 
 matrix:
   include:
-  - go: 1.12.x
+  - go: 1.13.x
     env: VET=1 GO111MODULE=on
-  - go: 1.12.x
+  - go: 1.13.x
     env: RACE=1 GO111MODULE=on
-  - go: 1.12.x
+  - go: 1.13.x
     env: RUN386=1
-  - go: 1.12.x
+  - go: 1.13.x
     env: GRPC_GO_RETRY=on
+  - go: 1.13.x
+    env: TESTEXAMPLES=1
+  - go: 1.12.x
+    env: GO111MODULE=on
   - go: 1.11.x
     env: GO111MODULE=on
-  - go: 1.10.x
-  - go: 1.9.x
   - go: 1.9.x
     env: GAE=1
 
@@ -23,17 +25,18 @@
   - if [[ "${GO111MODULE}" = "on" ]]; then mkdir "${HOME}/go"; export GOPATH="${HOME}/go"; fi
   - if [[ -n "${RUN386}" ]]; then export GOARCH=386; fi
   - if [[ "${TRAVIS_EVENT_TYPE}" = "cron" && -z "${RUN386}" ]]; then RACE=1; fi
-  - if [[ "${TRAVIS_EVENT_TYPE}" != "cron" ]]; then VET_SKIP_PROTO=1; fi
+  - if [[ "${TRAVIS_EVENT_TYPE}" != "cron" ]]; then export VET_SKIP_PROTO=1; fi
 
 install:
   - try3() { eval "$*" || eval "$*" || eval "$*"; }
   - try3 'if [[ "${GO111MODULE}" = "on" ]]; then go mod download; else make testdeps; fi'
-  - if [[ "${GAE}" = 1 ]]; then source ./install_gae.sh; make testappenginedeps; fi
-  - if [[ "${VET}" = 1 ]]; then ./vet.sh -install; fi
+  - if [[ -n "${GAE}" ]]; then source ./install_gae.sh; make testappenginedeps; fi
+  - if [[ -n "${VET}" ]]; then ./vet.sh -install; fi
 
 script:
   - set -e
-  - if [[ "${VET}" = 1 ]]; then ./vet.sh; fi
-  - if [[ "${GAE}" = 1 ]]; then make testappengine; exit 0; fi
-  - if [[ "${RACE}" = 1 ]]; then make testrace; exit 0; fi
+  - if [[ -n "${TESTEXAMPLES}" ]]; then examples/examples_test.sh; exit 0; fi
+  - if [[ -n "${VET}" ]]; then ./vet.sh; fi
+  - if [[ -n "${GAE}" ]]; then make testappengine; exit 0; fi
+  - if [[ -n "${RACE}" ]]; then make testrace; exit 0; fi
   - make test