diff --git a/.kokoro/docs.sh b/.kokoro/docs.sh
index a4f3187..952403f 100755
--- a/.kokoro/docs.sh
+++ b/.kokoro/docs.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -xeo pipefail
+set -eo pipefail
 
 export NPM_CONFIG_PREFIX=/home/node/.npm-global
 
diff --git a/.kokoro/lint.sh b/.kokoro/lint.sh
index bcb7508..b03cb04 100755
--- a/.kokoro/lint.sh
+++ b/.kokoro/lint.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -xeo pipefail
+set -eo pipefail
 
 export NPM_CONFIG_PREFIX=/home/node/.npm-global
 
diff --git a/.kokoro/samples-test.sh b/.kokoro/samples-test.sh
index 07d31dc..20e3241 100755
--- a/.kokoro/samples-test.sh
+++ b/.kokoro/samples-test.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -xeo pipefail
+set -eo pipefail
 
 export NPM_CONFIG_PREFIX=/home/node/.npm-global
 
diff --git a/.kokoro/system-test.sh b/.kokoro/system-test.sh
index b7374d0..fc5824e 100755
--- a/.kokoro/system-test.sh
+++ b/.kokoro/system-test.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -xeo pipefail
+set -eo pipefail
 
 export NPM_CONFIG_PREFIX=/home/node/.npm-global
 
diff --git a/.kokoro/test.sh b/.kokoro/test.sh
index 939f33b..f5755f9 100755
--- a/.kokoro/test.sh
+++ b/.kokoro/test.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -xeo pipefail
+set -eo pipefail
 
 export NPM_CONFIG_PREFIX=/home/node/.npm-global
 
diff --git a/.kokoro/trampoline.sh b/.kokoro/trampoline.sh
index 87ffd2c..9bd4905 100755
--- a/.kokoro/trampoline.sh
+++ b/.kokoro/trampoline.sh
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set -xeo pipefail
+set -eo pipefail
 
 # Always run the cleanup script, regardless of the success of bouncing into
 # the container.