diff --git a/.kokoro/common.sh b/.kokoro/common.sh
index 81bc572333..a274c5168c 100644
--- a/.kokoro/common.sh
+++ b/.kokoro/common.sh
@@ -21,6 +21,7 @@ set -eov pipefail
 setup_environment_secrets() {
   export GPG_PASSPHRASE=$(cat ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-passphrase)
   export GPG_TTY=$(tty)
+  export TMPDIR=$(mktemp -d)
   export GPG_HOMEDIR=${TMPDIR}/gpg
   mkdir $GPG_HOMEDIR
   mv ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-pubkeyring $GPG_HOMEDIR/pubring.gpg