diff --git a/quarkus/defaults/src/main/resources/application.properties b/quarkus/defaults/src/main/resources/application.properties
index cdb201903..c84ae5fe7 100644
--- a/quarkus/defaults/src/main/resources/application.properties
+++ b/quarkus/defaults/src/main/resources/application.properties
@@ -120,6 +120,7 @@ polaris.authentication.token-broker.max-token-generation=PT1H
 # polaris.storage.gcp.token=token
 # polaris.storage.gcp.lifespan=PT1H
 
+# Test-specific configuration
 %test.quarkus.log.file.enable=false
 %test.quarkus.log.category."org.apache.polaris".level=INFO
 %test.quarkus.log.category."org.apache.iceberg.rest".level=INFO
@@ -130,6 +131,8 @@ polaris.authentication.token-broker.max-token-generation=PT1H
 %test.quarkus.log.category."org.apache.polaris.service.storage.PolarisStorageIntegrationProviderImpl".level=ERROR
 %test.quarkus.http.limits.max-body-size=1000000
 %test.quarkus.otel.sdk.disabled=true
+%test.polaris.authentication.authenticator.type=test
+%test.polaris.authentication.token-service.type=test
 %test.polaris.authentication.token-broker.type=symmetric-key
 %test.polaris.authentication.token-broker.symmetric-key.secret=polaris
 %test.polaris.features.defaults."ALLOW_EXTERNAL_CATALOG_CREDENTIAL_VENDING"=false
diff --git a/regtests/run_spark_sql.sh b/regtests/run_spark_sql.sh
index cc355095e..7b1dcc2ea 100755
--- a/regtests/run_spark_sql.sh
+++ b/regtests/run_spark_sql.sh
@@ -48,6 +48,7 @@ cd ${REGTEST_HOME}
 
 export SPARK_VERSION=spark-3.5.3
 export SPARK_DISTRIBUTION=${SPARK_VERSION}-bin-hadoop3
+export SPARK_LOCAL_HOSTNAME=localhost #avoid VPN messy up driver local IP address binding
 
 ./setup.sh
 
@@ -55,7 +56,7 @@ if [ -z "${SPARK_HOME}"]; then
   export SPARK_HOME=$(realpath ~/${SPARK_DISTRIBUTION})
 fi
 
-SPARK_BEARER_TOKEN="${REGTEST_ROOT_BEARER_TOKEN:-principal:root;realm:default-realm}"
+SPARK_BEARER_TOKEN="${REGTEST_ROOT_BEARER_TOKEN:-principal:root;realm:polaris}"
 
 if [ $# -eq 0 ]; then
   # create a catalog backed by the local filesystem