diff --git a/ui/app/utils/parse-pki-cert.js b/ui/app/utils/parse-pki-cert.js
index 54dd8609e1..5aca3e7aea 100644
--- a/ui/app/utils/parse-pki-cert.js
+++ b/ui/app/utils/parse-pki-cert.js
@@ -104,20 +104,27 @@ export function formatValues(subject, extension) {
 }
 
 /*
-How to use the verify function for cross-signing: 
+Explanation of cross-signing and how to use the verify function: 
 (See setup script here: https://github.com/hashicorp/vault-tools/blob/main/vault-ui/pki/pki-cross-sign-config.sh)
 1. A trust chain exists between "old-parent-issuer-name" -> "old-intermediate"
-2. Cross-sign "old-intermediate" against "my-parent-issuer-name" creating a new certificate: "newly-cross-signed-int-name"
-3. Generate a leaf certificate from "newly-cross-signed-int-name", let's call it "baby-leaf"
-4. Verify that "baby-leaf" validates against both chains: 
+2. We create a new root, "my-parent-issuer-name" to phase out the old one
+
+* cross-signing step performed in the UI * 
+3. Cross-sign "old-intermediate" against new root "my-parent-issuer-name" which generates a new intermediate issuer, 
+"newly-cross-signed-int-name", to phase out the old intermediate
+
+* validate cross-signing accurately copied the old intermediate issuer *
+4. Generate a leaf certificate from "newly-cross-signed-int-name", let's call it "baby-leaf"
+5. Verify that "baby-leaf" validates against both chains: 
 "old-parent-issuer-name" -> "old-intermediate" -> "baby-leaf"
 "my-parent-issuer-name" -> "newly-cross-signed-int-name" -> "baby-leaf"
 
-A valid cross-signing would mean BOTH of the following return true:
-verifyCertificates(oldParentCert, oldIntCert, leaf)
-verifyCertificates(newParentCert, crossSignedCert, leaf)
+We're just concerned with the link between the leaf and both intermediates
+to confirm the UI performed the cross-sign correctly
+(which already assumes the link between each parent and intermediate is valid)
+
+verifyCertificates(oldIntermediate, crossSignedCert, leaf)
 
-each arg is the JSON string certificate value
 */
 export async function verifyCertificates(certA, certB, leaf) {
   const parsedCertA = jsonToCertObject(certA);
@@ -131,7 +138,7 @@ export async function verifyCertificates(certA, certB, leaf) {
     const isEqualB = parsedLeaf.issuer.isEqual(parsedCertB.subject);
     return chainA && chainB && isEqualA && isEqualB;
   }
-  // can be used to validate if a certificate is self-signed, by passing it as both certA and B (i.e. a root cert)
+  // can be used to validate if a certificate is self-signed (i.e. a root cert), by passing it as both certA and B
   return (await parsedCertA.verify(parsedCertB)) && parsedCertA.issuer.isEqual(parsedCertB.subject);
 }
 
diff --git a/ui/tests/acceptance/pki/pki-cross-sign-test.js b/ui/tests/acceptance/pki/pki-cross-sign-test.js
new file mode 100644
index 0000000000..f20d9fc9c9
--- /dev/null
+++ b/ui/tests/acceptance/pki/pki-cross-sign-test.js
@@ -0,0 +1,111 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
+import { module, test } from 'qunit';
+import { visit, click, fillIn, find } from '@ember/test-helpers';
+import { setupApplicationTest } from 'vault/tests/helpers';
+import { v4 as uuidv4 } from 'uuid';
+
+import authPage from 'vault/tests/pages/auth';
+import logout from 'vault/tests/pages/logout';
+import enablePage from 'vault/tests/pages/settings/mount-secret-backend';
+import { runCommands } from 'vault/tests/helpers/pki/pki-run-commands';
+import { SELECTORS } from 'vault/tests/helpers/pki/pki-issuer-cross-sign';
+import { verifyCertificates } from 'vault/utils/parse-pki-cert';
+module('Acceptance | pki/pki cross sign', function (hooks) {
+  setupApplicationTest(hooks);
+
+  hooks.beforeEach(async function () {
+    await authPage.login();
+    this.parentMountPath = `parent-mount-${uuidv4()}`;
+    this.oldParentIssuerName = 'old-parent-issuer'; // old parent issuer we're transferring from
+    this.parentIssuerName = 'new-parent-issuer'; // issuer where cross-signing action will begin
+    this.intMountPath = `intermediate-mount-${uuidv4()}`; // first input box in cross-signing page
+    this.intIssuerName = 'my-intermediate-issuer'; // second input box in cross-signing page
+    this.newlySignedIssuer = 'my-newly-signed-int'; // third input
+    await enablePage.enable('pki', this.parentMountPath);
+    await enablePage.enable('pki', this.intMountPath);
+
+    await runCommands([
+      `write "${this.parentMountPath}/root/generate/internal" common_name="Long-Lived Root X1" ttl=8960h issuer_name="${this.oldParentIssuerName}"`,
+      `write "${this.parentMountPath}/root/generate/internal" common_name="Long-Lived Root X2" ttl=8960h issuer_name="${this.parentIssuerName}"`,
+      `write "${this.parentMountPath}/config/issuers" default="${this.parentIssuerName}"`,
+    ]);
+  });
+
+  hooks.afterEach(async function () {
+    // Cleanup engine
+    await runCommands([`delete sys/mounts/${this.intMountPath}`]);
+    await runCommands([`delete sys/mounts/${this.parentMountPath}`]);
+    await logout.visit();
+  });
+
+  test('it cross-signs an issuer', async function (assert) {
+    // configure parent and intermediate mounts to make them cross-signable
+    await visit(`/vault/secrets/${this.intMountPath}/pki/configuration/create`);
+    await click(SELECTORS.configure.optionByKey('generate-csr'));
+    await fillIn(SELECTORS.inputByName('type'), 'internal');
+    await fillIn(SELECTORS.inputByName('commonName'), 'Short-Lived Int R1');
+    await click('[data-test-save]');
+    const csr = find(SELECTORS.copyButton('CSR')).getAttribute('data-clipboard-text');
+    await visit(`vault/secrets/${this.parentMountPath}/pki/issuers/${this.oldParentIssuerName}/sign`);
+    await fillIn(SELECTORS.inputByName('csr'), csr);
+    await fillIn(SELECTORS.inputByName('format'), 'pem_bundle');
+    await click('[data-test-pki-sign-intermediate-save]');
+    const pemBundle = find(SELECTORS.copyButton('CA Chain'))
+      .getAttribute('data-clipboard-text')
+      .replace(/,/, '\n');
+    await visit(`vault/secrets/${this.intMountPath}/pki/configuration/create`);
+    await click(SELECTORS.configure.optionByKey('import'));
+    await click('[data-test-text-toggle]');
+    await fillIn('[data-test-text-file-textarea]', pemBundle);
+    await click(SELECTORS.configure.importSubmit);
+    await visit(`vault/secrets/${this.intMountPath}/pki/issuers`);
+    await click('[data-test-is-default]');
+    // name default issuer of intermediate
+    const oldIntIssuerId = find(SELECTORS.rowValue('Issuer ID')).innerText;
+    const oldIntCert = find(SELECTORS.copyButton('Certificate')).getAttribute('data-clipboard-text');
+    await click(SELECTORS.details.configure);
+    await fillIn(SELECTORS.inputByName('issuerName'), this.intIssuerName);
+    await click('[data-test-save]');
+
+    // perform cross-sign
+    await visit(`vault/secrets/${this.parentMountPath}/pki/issuers/${this.parentIssuerName}/cross-sign`);
+    await fillIn(SELECTORS.objectListInput('intermediateMount'), this.intMountPath);
+    await fillIn(SELECTORS.objectListInput('intermediateIssuer'), this.intIssuerName);
+    await fillIn(SELECTORS.objectListInput('newCrossSignedIssuer'), this.newlySignedIssuer);
+    await click(SELECTORS.submitButton);
+    assert
+      .dom(`${SELECTORS.signedIssuerCol('intermediateMount')} a`)
+      .hasAttribute('href', `/ui/vault/secrets/${this.intMountPath}/pki/overview`);
+    assert
+      .dom(`${SELECTORS.signedIssuerCol('intermediateIssuer')} a`)
+      .hasAttribute('href', `/ui/vault/secrets/${this.intMountPath}/pki/issuers/${oldIntIssuerId}/details`);
+
+    // get certificate data of newly signed issuer
+    await click(`${SELECTORS.signedIssuerCol('newCrossSignedIssuer')} a`);
+    const newIntCert = find(SELECTORS.copyButton('Certificate')).getAttribute('data-clipboard-text');
+
+    // verify cross-sign was accurate by creating a role to issue a leaf certificate
+    const myRole = 'some-role';
+    await runCommands([
+      `write ${this.intMountPath}/roles/${myRole} \
+    issuer_ref=${this.newlySignedIssuer}\
+    allow_any_name=true \
+    max_ttl="720h"`,
+    ]);
+    await visit(`vault/secrets/${this.intMountPath}/pki/roles/${myRole}/generate`);
+    await fillIn(SELECTORS.inputByName('commonName'), 'my-leaf');
+    await fillIn('[data-test-ttl-value="TTL"]', '3600');
+    await click('[data-test-pki-generate-button]');
+    const myLeafCert = find(SELECTORS.copyButton('Certificate')).getAttribute('data-clipboard-text');
+
+    // see comments in utils/parse-pki-cert.js for step-by-step explanation of of verifyCertificates method
+    assert.true(
+      await verifyCertificates(oldIntCert, newIntCert, myLeafCert),
+      'the leaf certificate validates against both intermediate certificates'
+    );
+  });
+});
diff --git a/ui/tests/helpers/pki/pki-issuer-cross-sign.js b/ui/tests/helpers/pki/pki-issuer-cross-sign.js
new file mode 100644
index 0000000000..86700e9301
--- /dev/null
+++ b/ui/tests/helpers/pki/pki-issuer-cross-sign.js
@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
+import { SELECTORS as CONFIGURE } from './pki-configure-create';
+import { SELECTORS as DETAILS } from './pki-issuer-details';
+
+export const SELECTORS = {
+  objectListInput: (key, row = 0) => `[data-test-object-list-input="${key}-${row}"]`,
+  inputByName: (name) => `[data-test-input="${name}"]`,
+  addRow: '[data-test-object-list-add-button',
+  submitButton: '[data-test-cross-sign-submit]',
+  cancelButton: '[data-test-cross-sign-cancel]',
+  statusCount: '[data-test-cross-sign-status-count]',
+  signedIssuerRow: (row = 0) => `[data-test-info-table-row="${row}"]`,
+  signedIssuerCol: (attr) => `[data-test-info-table-column="${attr}"]`,
+  // for cross signing acceptance tests
+  configure: { ...CONFIGURE },
+  details: { ...DETAILS },
+  rowValue: (attr) => `[data-test-row-value="${attr}"]`,
+  copyButton: (attr) => `[data-test-value-div="${attr}"] [data-test-copy-button]`,
+};
diff --git a/ui/tests/integration/components/pki/pki-issuer-cross-sign-test.js b/ui/tests/integration/components/pki/pki-issuer-cross-sign-test.js
index ccb127b58a..a7e75ef91e 100644
--- a/ui/tests/integration/components/pki/pki-issuer-cross-sign-test.js
+++ b/ui/tests/integration/components/pki/pki-issuer-cross-sign-test.js
@@ -18,16 +18,8 @@ import {
   parentIssuerCert,
   unsupportedOids,
 } from 'vault/tests/helpers/pki/values';
+import { SELECTORS } from 'vault/tests/helpers/pki/pki-issuer-cross-sign';
 
-const SELECTORS = {
-  input: (key, row = 0) => `[data-test-object-list-input="${key}-${row}"]`,
-  addRow: '[data-test-object-list-add-button',
-  submitButton: '[data-test-cross-sign-submit]',
-  cancelButton: '[data-test-cross-sign-cancel]',
-  statusCount: '[data-test-cross-sign-status-count]',
-  signedIssuerRow: (row = 0) => `[data-test-info-table-row="${row}"]`,
-  signedIssuerCol: (attr) => `[data-test-info-table-column="${attr}"]`,
-};
 const FIELDS = [
   {
     label: 'Mount path',
@@ -190,7 +182,7 @@ module('Integration | Component | pki issuer cross sign', function (hooks) {
     });
     // fill out form and submit
     for (const field of FIELDS) {
-      await fillIn(SELECTORS.input(field.key), this.testInputs[field.key]);
+      await fillIn(SELECTORS.objectListInput(field.key), this.testInputs[field.key]);
     }
     await click(SELECTORS.submitButton);
 
@@ -248,15 +240,15 @@ module('Integration | Component | pki issuer cross sign', function (hooks) {
 
     // fill out form and submit
     for (const field of FIELDS) {
-      await fillIn(SELECTORS.input(field.key), this.testInputs[field.key]);
+      await fillIn(SELECTORS.objectListInput(field.key), this.testInputs[field.key]);
     }
     await click(SELECTORS.addRow);
     for (const field of FIELDS) {
-      await fillIn(SELECTORS.input(field.key, 1), nonexistentIssuer[field.key]);
+      await fillIn(SELECTORS.objectListInput(field.key, 1), nonexistentIssuer[field.key]);
     }
     await click(SELECTORS.addRow);
     for (const field of FIELDS) {
-      await fillIn(SELECTORS.input(field.key, 2), unsupportedCert[field.key]);
+      await fillIn(SELECTORS.objectListInput(field.key, 2), unsupportedCert[field.key]);
     }
     await click(SELECTORS.submitButton);
 
@@ -296,7 +288,7 @@ module('Integration | Component | pki issuer cross sign', function (hooks) {
 
     // fill out form and submit
     for (const field of FIELDS) {
-      await fillIn(SELECTORS.input(field.key), this.testInputs[field.key]);
+      await fillIn(SELECTORS.objectListInput(field.key), this.testInputs[field.key]);
     }
     await click(SELECTORS.submitButton);
 
@@ -329,7 +321,7 @@ module('Integration | Component | pki issuer cross sign', function (hooks) {
     });
     // fill out form and submit
     for (const field of FIELDS) {
-      await fillIn(SELECTORS.input(field.key), this.testInputs[field.key]);
+      await fillIn(SELECTORS.objectListInput(field.key), this.testInputs[field.key]);
     }
     await click(SELECTORS.submitButton);
     assert.dom(SELECTORS.statusCount).hasText('Cross-signing complete (0 successful, 1 error)');