diff --git a/.ci/cloudbuild.yaml b/.ci/cloudbuild.yaml
new file mode 100644
index 00000000..331559cd
--- /dev/null
+++ b/.ci/cloudbuild.yaml
@@ -0,0 +1,78 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+steps:
+  - id: run integration tests
+    name: node:${_VERSION}
+    entrypoint: bash
+    env:
+      - "IP_TYPE=${_IP_TYPE}"
+    secretEnv: ['MYSQL_CONNECTION_NAME', 'MYSQL_USER', 'MYSQL_IAM_USER', 'MYSQL_PASS', 'MYSQL_DB', 'POSTGRES_CONNECTION_NAME', 'POSTGRES_USER', 'POSTGRES_IAM_USER', 'POSTGRES_PASS', 'POSTGRES_DB', 'POSTGRES_CAS_CONNECTION_NAME', 'POSTGRES_CAS_PASS', 'POSTGRES_CUSTOMER_CAS_CONNECTION_NAME', 'POSTGRES_CUSTOMER_CAS_PASS', 'POSTGRES_CUSTOMER_CAS_DOMAIN_NAME', 'POSTGRES_CUSTOMER_CAS_INVALID_DOMAIN_NAME', 'SQLSERVER_CONNECTION_NAME', 'SQLSERVER_USER', 'SQLSERVER_PASS', 'SQLSERVER_DB']
+    args:
+      - "-c"
+      - |
+        npm link
+        npm link @google-cloud/cloud-sql-connector
+        npx tap -c -t0 --disable-coverage --allow-empty-coverage system-test -o test_results.tap
+    timeout: 300s
+availableSecrets:
+  secretManager:
+  - versionName: 'projects/$PROJECT_ID/secrets/MYSQL_CONNECTION_NAME/versions/latest'
+    env: 'MYSQL_CONNECTION_NAME'
+  - versionName: 'projects/$PROJECT_ID/secrets/MYSQL_USER/versions/latest'
+    env: 'MYSQL_USER'
+  - versionName: 'projects/$PROJECT_ID/secrets/CLOUD_BUILD_MYSQL_IAM_USER/versions/latest'
+    env: 'MYSQL_IAM_USER'
+  - versionName: 'projects/$PROJECT_ID/secrets/MYSQL_PASS/versions/latest'
+    env: 'MYSQL_PASS'
+  - versionName: 'projects/$PROJECT_ID/secrets/MYSQL_DB/versions/latest'
+    env: 'MYSQL_DB'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_CONNECTION_NAME/versions/latest'
+    env: 'POSTGRES_CONNECTION_NAME'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_USER/versions/latest'
+    env: 'POSTGRES_USER'
+  - versionName: 'projects/$PROJECT_ID/secrets/CLOUD_BUILD_POSTGRES_IAM_USER/versions/latest'
+    env: 'POSTGRES_IAM_USER'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_PASS/versions/latest'
+    env: 'POSTGRES_PASS'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_DB/versions/latest'
+    env: 'POSTGRES_DB'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_CAS_CONNECTION_NAME/versions/latest'
+    env: 'POSTGRES_CAS_CONNECTION_NAME'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_CAS_PASS/versions/latest'
+    env: 'POSTGRES_CAS_PASS'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_CUSTOMER_CAS_CONNECTION_NAME/versions/latest'
+    env: 'POSTGRES_CUSTOMER_CAS_CONNECTION_NAME'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_CUSTOMER_CAS_PASS/versions/latest'
+    env: 'POSTGRES_CUSTOMER_CAS_PASS'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_CUSTOMER_CAS_DOMAIN_NAME/versions/latest'
+    env: 'POSTGRES_CUSTOMER_CAS_DOMAIN_NAME'
+  - versionName: 'projects/$PROJECT_ID/secrets/POSTGRES_CUSTOMER_CAS_INVALID_DOMAIN_NAME/versions/latest'
+    env: 'POSTGRES_CUSTOMER_CAS_INVALID_DOMAIN_NAME'
+  - versionName: 'projects/$PROJECT_ID/secrets/SQLSERVER_CONNECTION_NAME/versions/latest'
+    env: 'SQLSERVER_CONNECTION_NAME'
+  - versionName: 'projects/$PROJECT_ID/secrets/SQLSERVER_USER/versions/latest'
+    env: 'SQLSERVER_USER'
+  - versionName: 'projects/$PROJECT_ID/secrets/SQLSERVER_PASS/versions/latest'
+    env: 'SQLSERVER_PASS'
+  - versionName: 'projects/$PROJECT_ID/secrets/SQLSERVER_DB/versions/latest'
+    env: 'SQLSERVER_DB'
+substitutions:
+  _VERSION: ${_VERSION}
+  _IP_TYPE: ${_IP_TYPE}
+options:
+  dynamicSubstitutions: true
+  pool:
+    name: ${_POOL_NAME}
+  logging: CLOUD_LOGGING_ONLY
diff --git a/.gitignore b/.gitignore
index 8cc243e2..e5f3b799 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,4 @@
 !/.trampolinerc
 !/.kokoro
 !/tsconfig*.json
+!/.ci
diff --git a/system-test/mysql2-connect.cjs b/system-test/mysql2-connect.cjs
index e7253f54..0a91361f 100644
--- a/system-test/mysql2-connect.cjs
+++ b/system-test/mysql2-connect.cjs
@@ -20,7 +20,7 @@ t.test('open connection and run basic mysql commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: process.env.MYSQL_CONNECTION_NAME,
-    ipType: 'PUBLIC',
+    ipType: process.env.IP_TYPE || 'PUBLIC',
     authType: 'PASSWORD',
   });
   const conn = await mysql.createConnection({
@@ -42,7 +42,7 @@ t.test('open IAM connection and run basic mysql commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: process.env.MYSQL_CONNECTION_NAME,
-    ipType: 'PUBLIC',
+    ipType: process.env.IP_TYPE || 'PUBLIC',
     authType: 'IAM',
   });
   const conn = await mysql.createConnection({
diff --git a/system-test/mysql2-connect.mjs b/system-test/mysql2-connect.mjs
index 9811eb61..86a6f898 100644
--- a/system-test/mysql2-connect.mjs
+++ b/system-test/mysql2-connect.mjs
@@ -20,7 +20,7 @@ t.test('open connection and run basic mysql commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: process.env.MYSQL_CONNECTION_NAME,
-    ipType: 'PUBLIC',
+    ipType: process.env.IP_TYPE || 'PUBLIC',
     authType: 'PASSWORD',
   });
   const conn = await mysql.createConnection({
@@ -42,7 +42,7 @@ t.test('open IAM connection and run basic mysql commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: process.env.MYSQL_CONNECTION_NAME,
-    ipType: 'PUBLIC',
+    ipType: process.env.IP_TYPE || 'PUBLIC',
     authType: 'IAM',
   });
   const conn = await mysql.createConnection({
diff --git a/system-test/mysql2-connect.ts b/system-test/mysql2-connect.ts
index 4da5b546..a7e24e06 100644
--- a/system-test/mysql2-connect.ts
+++ b/system-test/mysql2-connect.ts
@@ -29,6 +29,7 @@ t.test('open connection and run basic mysql commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: String(process.env.MYSQL_CONNECTION_NAME),
+    ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
   });
   const conn = await mysql.createConnection({
     ...clientOpts,
@@ -50,7 +51,7 @@ t.test('open IAM connection and run basic mysql commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: String(process.env.MYSQL_CONNECTION_NAME),
-    ipType: IpAddressTypes.PUBLIC,
+    ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
     authType: AuthTypes.IAM,
   });
   const conn = await mysql.createConnection({
diff --git a/system-test/pg-connect.cjs b/system-test/pg-connect.cjs
index ddd86157..f100a6e7 100644
--- a/system-test/pg-connect.cjs
+++ b/system-test/pg-connect.cjs
@@ -21,6 +21,7 @@ t.test('open connection and retrieves standard pg tables', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: process.env.POSTGRES_CONNECTION_NAME,
+    ipType: process.env.IP_TYPE || 'PUBLIC',
   });
   const client = new Client({
     ...clientOpts,
@@ -49,7 +50,7 @@ t.test('open IAM connection and retrieves standard pg tables', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: process.env.POSTGRES_CONNECTION_NAME,
-    ipType: 'PUBLIC',
+    ipType: process.env.IP_TYPE || 'PUBLIC',
     authType: 'IAM',
   });
   const client = new Client({
@@ -79,6 +80,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       instanceConnectionName: String(process.env.POSTGRES_CAS_CONNECTION_NAME),
+      ipType: process.env.IP_TYPE || 'PUBLIC',
     });
     const client = new Client({
       ...clientOpts,
@@ -112,6 +114,7 @@ t.test(
       instanceConnectionName: String(
         process.env.POSTGRES_CUSTOMER_CAS_CONNECTION_NAME
       ),
+      ipType: process.env.IP_TYPE || 'PUBLIC',
     });
     const client = new Client({
       ...clientOpts,
@@ -142,6 +145,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       domainName: String(process.env.POSTGRES_CUSTOMER_CAS_DOMAIN_NAME),
+      ipType: process.env.IP_TYPE || 'PUBLIC',
     });
     const client = new Client({
       ...clientOpts,
@@ -172,6 +176,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       domainName: String(process.env.POSTGRES_CUSTOMER_CAS_INVALID_DOMAIN_NAME),
+      ipType: process.env.IP_TYPE || 'PUBLIC',
     });
     const client = new Client({
       ...clientOpts,
diff --git a/system-test/pg-connect.mjs b/system-test/pg-connect.mjs
index 6860bdc7..ff41576f 100644
--- a/system-test/pg-connect.mjs
+++ b/system-test/pg-connect.mjs
@@ -22,6 +22,7 @@ t.test('open connection and retrieves standard pg tables', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: String(process.env.POSTGRES_CONNECTION_NAME),
+    ipType: process.env.IP_TYPE || 'PUBLIC',
   });
   const client = new Client({
     ...clientOpts,
@@ -50,7 +51,7 @@ t.test('open IAM connection and retrieves standard pg tables', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: String(process.env.POSTGRES_CONNECTION_NAME),
-    ipType: 'PUBLIC',
+    ipType: process.env.IP_TYPE || 'PUBLIC',
     authType: 'IAM',
   });
   const client = new Client({
@@ -80,6 +81,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       instanceConnectionName: String(process.env.POSTGRES_CAS_CONNECTION_NAME),
+      ipType: process.env.IP_TYPE || 'PUBLIC',
     });
     const client = new Client({
       ...clientOpts,
@@ -113,6 +115,7 @@ t.test(
       instanceConnectionName: String(
         process.env.POSTGRES_CUSTOMER_CAS_CONNECTION_NAME
       ),
+      ipType: process.env.IP_TYPE || 'PUBLIC',
     });
     const client = new Client({
       ...clientOpts,
@@ -143,6 +146,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       domainName: String(process.env.POSTGRES_CUSTOMER_CAS_DOMAIN_NAME),
+      ipType: process.env.IP_TYPE || 'PUBLIC',
     });
     const client = new Client({
       ...clientOpts,
@@ -173,6 +177,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       domainName: String(process.env.POSTGRES_CUSTOMER_CAS_INVALID_DOMAIN_NAME),
+      ipType: process.env.IP_TYPE || 'PUBLIC',
     });
     const client = new Client({
       ...clientOpts,
diff --git a/system-test/pg-connect.ts b/system-test/pg-connect.ts
index 60fe3076..0966aa3a 100644
--- a/system-test/pg-connect.ts
+++ b/system-test/pg-connect.ts
@@ -25,6 +25,7 @@ t.test('open connection and retrieves standard pg tables', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: String(process.env.POSTGRES_CONNECTION_NAME),
+    ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
   });
   const client = new Client({
     ...clientOpts,
@@ -53,7 +54,7 @@ t.test('open IAM connection and retrieves standard pg tables', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getOptions({
     instanceConnectionName: String(process.env.POSTGRES_CONNECTION_NAME),
-    ipType: IpAddressTypes.PUBLIC,
+    ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
     authType: AuthTypes.IAM,
   });
   const client = new Client({
@@ -83,6 +84,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       instanceConnectionName: String(process.env.POSTGRES_CAS_CONNECTION_NAME),
+      ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
     });
     const client = new Client({
       ...clientOpts,
@@ -116,6 +118,7 @@ t.test(
       instanceConnectionName: String(
         process.env.POSTGRES_CUSTOMER_CAS_CONNECTION_NAME
       ),
+      ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
     });
     const client = new Client({
       ...clientOpts,
@@ -146,6 +149,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       domainName: String(process.env.POSTGRES_CUSTOMER_CAS_DOMAIN_NAME),
+      ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
     });
     const client = new Client({
       ...clientOpts,
@@ -176,6 +180,7 @@ t.test(
     const connector = new Connector();
     const clientOpts = await connector.getOptions({
       domainName: String(process.env.POSTGRES_CUSTOMER_CAS_INVALID_DOMAIN_NAME),
+      ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
     });
     const client = new Client({
       ...clientOpts,
diff --git a/system-test/tedious-connect.cjs b/system-test/tedious-connect.cjs
index f2ead835..56cfadee 100644
--- a/system-test/tedious-connect.cjs
+++ b/system-test/tedious-connect.cjs
@@ -20,7 +20,7 @@ t.test('open connection and run basic sqlserver commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getTediousOptions({
     instanceConnectionName: process.env.SQLSERVER_CONNECTION_NAME,
-    ipType: 'PUBLIC',
+    ipType: process.env.IP_TYPE || 'PUBLIC',
   });
   const connection = new Connection({
     server: '0.0.0.0',
diff --git a/system-test/tedious-connect.mjs b/system-test/tedious-connect.mjs
index 9fd0aa73..a5414441 100644
--- a/system-test/tedious-connect.mjs
+++ b/system-test/tedious-connect.mjs
@@ -20,7 +20,7 @@ t.test('open connection and run basic sqlserver commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getTediousOptions({
     instanceConnectionName: process.env.SQLSERVER_CONNECTION_NAME,
-    ipType: 'PUBLIC',
+    ipType: process.env.IP_TYPE || 'PUBLIC',
   });
   const connection = new Connection({
     server: '0.0.0.0',
diff --git a/system-test/tedious-connect.ts b/system-test/tedious-connect.ts
index e789e273..ad7d62a1 100644
--- a/system-test/tedious-connect.ts
+++ b/system-test/tedious-connect.ts
@@ -20,7 +20,7 @@ t.test('open connection and run basic sqlserver commands', async t => {
   const connector = new Connector();
   const clientOpts = await connector.getTediousOptions({
     instanceConnectionName: String(process.env.SQLSERVER_CONNECTION_NAME),
-    ipType: IpAddressTypes.PUBLIC,
+    ipType: process.env.IP_TYPE || IpAddressTypes.PUBLIC,
   });
   const connection = new Connection({
     server: '0.0.0.0',