diff --git a/x-pack/plugins/cloud_security_posture/public/components/fleet_extensions/gcp_credential_form.tsx b/x-pack/plugins/cloud_security_posture/public/components/fleet_extensions/gcp_credential_form.tsx
index a1d280f58c7a6..909eb029f5e98 100644
--- a/x-pack/plugins/cloud_security_posture/public/components/fleet_extensions/gcp_credential_form.tsx
+++ b/x-pack/plugins/cloud_security_posture/public/components/fleet_extensions/gcp_credential_form.tsx
@@ -177,12 +177,14 @@ const credentialOptionsList = [
       defaultMessage: 'Credentials File',
     }),
     value: 'credentials-file',
+    'data-test-subj': 'credentials_file_option_test_id',
   },
   {
     text: i18n.translate('xpack.csp.gcpIntegration.credentialsJsonOption', {
       defaultMessage: 'Credentials JSON',
     }),
     value: 'credentials-json',
+    'data-test-subj': 'credentials_json_option_test_id',
   },
 ];
 
diff --git a/x-pack/test/cloud_security_posture_functional/page_objects/add_cis_integration_form_page.ts b/x-pack/test/cloud_security_posture_functional/page_objects/add_cis_integration_form_page.ts
index 924a2ae6c0dca..795c2edb62dd4 100644
--- a/x-pack/test/cloud_security_posture_functional/page_objects/add_cis_integration_form_page.ts
+++ b/x-pack/test/cloud_security_posture_functional/page_objects/add_cis_integration_form_page.ts
@@ -62,8 +62,23 @@ export function AddCisIntegrationFormPageProvider({
     },
 
     fillInTextField: async (selector: string, text: string) => {
-      const test = await testSubjects.find(selector);
-      await test.type(text);
+      const textField = await testSubjects.find(selector);
+      await textField.type(text);
+    },
+
+    chooseDropDown: async (selector: string, text: string) => {
+      const credentialTypeBox = await testSubjects.find(selector);
+      const chosenOption = await testSubjects.find(text);
+      await credentialTypeBox.click();
+      await chosenOption.click();
+    },
+
+    getFieldValueInEditPage: async (field: string) => {
+      /* Newly added/edited integration always shows up on top by default as such we can just always click the most top if we want to check for the latest one  */
+      const integrationList = await testSubjects.findAll('integrationNameLink');
+      await integrationList[0].click();
+      const fieldValue = await (await testSubjects.find(field)).getAttribute('value');
+      return fieldValue;
     },
   };
 
@@ -75,8 +90,16 @@ export function AddCisIntegrationFormPageProvider({
     );
   };
 
+  const navigateToIntegrationCspList = async () => {
+    await PageObjects.common.navigateToActualUrl(
+      'integrations', // Defined in Security Solution plugin
+      '/detail/cloud_security_posture/policies'
+    );
+  };
+
   return {
     cisGcp,
     navigateToAddIntegrationCspmPage,
+    navigateToIntegrationCspList,
   };
 }
diff --git a/x-pack/test/cloud_security_posture_functional/pages/cis_integration.ts b/x-pack/test/cloud_security_posture_functional/pages/cis_integration.ts
index 5935fc49b06a0..20f85163521a7 100644
--- a/x-pack/test/cloud_security_posture_functional/pages/cis_integration.ts
+++ b/x-pack/test/cloud_security_posture_functional/pages/cis_integration.ts
@@ -16,6 +16,8 @@ const GCP_MANUAL_TEST_ID = 'gcpManualOptionTestId';
 const PRJ_ID_TEST_ID = 'project_id_test_id';
 const ORG_ID_TEST_ID = 'organization_id_test_id';
 const CREDENTIALS_TYPE_TEST_ID = 'credentials_type_test_id';
+const CREDENTIALS_FILE_TEST_ID = 'credentials_file_test_id';
+const CREDENTIALS_JSON_TEST_ID = 'credentials_json_test_id';
 
 // eslint-disable-next-line import/no-default-export
 export default function (providerContext: FtrProviderContext) {
@@ -103,5 +105,75 @@ export default function (providerContext: FtrProviderContext) {
         );
       });
     });
+
+    describe('CIS_GCP Single', () => {
+      it('Post Installation Google Cloud Shell modal pops up after user clicks on Save button when adding integration, when there are no Project ID, it should use default value', async () => {
+        await cisIntegrationGcp.clickOptionButton(CIS_GCP_OPTION_TEST_ID);
+        await cisIntegrationGcp.clickOptionButton(GCP_SINGLE_ACCOUNT_TEST_ID);
+        await cisIntegrationGcp.clickOptionButton(GCP_CLOUD_SHELL_TEST_ID);
+        await cisIntegrationGcp.clickSaveButton();
+        pageObjects.header.waitUntilLoadingHasFinished();
+        expect((await cisIntegrationGcp.isPostInstallGoogleCloudShellModal(false)) === true).to.be(
+          true
+        );
+      });
+
+      it('Post Installation Google Cloud Shell modal pops up after user clicks on Save button when adding integration, when there are Project ID, it should use that value', async () => {
+        const projectName = 'PRJ_NAME_TEST';
+        await cisIntegrationGcp.clickOptionButton(CIS_GCP_OPTION_TEST_ID);
+        await cisIntegrationGcp.clickOptionButton(GCP_SINGLE_ACCOUNT_TEST_ID);
+        await cisIntegrationGcp.clickOptionButton(GCP_CLOUD_SHELL_TEST_ID);
+        await cisIntegrationGcp.fillInTextField('project_id_test_id', projectName);
+
+        await cisIntegrationGcp.clickSaveButton();
+        pageObjects.header.waitUntilLoadingHasFinished();
+        expect(
+          (await cisIntegrationGcp.isPostInstallGoogleCloudShellModal(false, '', projectName)) ===
+            true
+        ).to.be(true);
+      });
+
+      it('Users are able to add CIS_GCP Integration with Manual settings using Credentials File', async () => {
+        const projectName = 'PRJ_NAME_TEST';
+        const credentialFileName = 'CRED_FILE_TEST_NAME';
+        await cisIntegrationGcp.clickOptionButton(CIS_GCP_OPTION_TEST_ID);
+        await cisIntegrationGcp.clickOptionButton(GCP_SINGLE_ACCOUNT_TEST_ID);
+        await cisIntegrationGcp.clickOptionButton(GCP_MANUAL_TEST_ID);
+        await cisIntegrationGcp.fillInTextField(PRJ_ID_TEST_ID, projectName);
+        await cisIntegrationGcp.fillInTextField(CREDENTIALS_FILE_TEST_ID, credentialFileName);
+
+        await cisIntegrationGcp.clickSaveButton();
+        pageObjects.header.waitUntilLoadingHasFinished();
+        expect((await cisIntegrationGcp.getPostInstallModal()) !== undefined).to.be(true);
+        await cisIntegration.navigateToIntegrationCspList();
+        expect(
+          (await cisIntegrationGcp.getFieldValueInEditPage(CREDENTIALS_FILE_TEST_ID)) ===
+            credentialFileName
+        ).to.be(true);
+      });
+
+      it('Users are able to add CIS_GCP Integration with Manual settings using Credentials JSON', async () => {
+        const projectName = 'PRJ_NAME_TEST';
+        const credentialJsonName = 'CRED_JSON_TEST_NAME';
+        await cisIntegrationGcp.clickOptionButton(CIS_GCP_OPTION_TEST_ID);
+        await cisIntegrationGcp.clickOptionButton(GCP_SINGLE_ACCOUNT_TEST_ID);
+        await cisIntegrationGcp.clickOptionButton(GCP_MANUAL_TEST_ID);
+        await cisIntegrationGcp.fillInTextField(PRJ_ID_TEST_ID, projectName);
+        await cisIntegrationGcp.chooseDropDown(
+          CREDENTIALS_TYPE_TEST_ID,
+          'credentials_json_option_test_id'
+        );
+        await cisIntegrationGcp.fillInTextField(CREDENTIALS_JSON_TEST_ID, credentialJsonName);
+
+        await cisIntegrationGcp.clickSaveButton();
+        pageObjects.header.waitUntilLoadingHasFinished();
+        expect((await cisIntegrationGcp.getPostInstallModal()) !== undefined).to.be(true);
+        await cisIntegration.navigateToIntegrationCspList();
+        expect(
+          (await cisIntegrationGcp.getFieldValueInEditPage(CREDENTIALS_JSON_TEST_ID)) ===
+            credentialJsonName
+        ).to.be(true);
+      });
+    });
   });
 }