diff --git a/ui/core/package.json b/ui/core/package.json
index 6b6547fbd..a22b04aee 100644
--- a/ui/core/package.json
+++ b/ui/core/package.json
@@ -86,7 +86,8 @@
     "qunit-dom": "^1.0.0",
     "rose": "*",
     "sass": "^1.26.5",
-    "sass-lint": "^1.13.1"
+    "sass-lint": "^1.13.1",
+    "sinon": "^9.1.0"
   },
   "engines": {
     "node": "10.* || >= 12"
diff --git a/ui/core/tests/acceptance/projects-test.js b/ui/core/tests/acceptance/projects-test.js
index 0483a56c8..9a3830c40 100644
--- a/ui/core/tests/acceptance/projects-test.js
+++ b/ui/core/tests/acceptance/projects-test.js
@@ -10,6 +10,7 @@ import {
   //currentSession,
   //invalidateSession,
 } from 'ember-simple-auth/test-support';
+import sinon from 'sinon';
 
 module('Acceptance | projects', function (hooks) {
   setupApplicationTest(hooks);
@@ -141,6 +142,28 @@ module('Acceptance | projects', function (hooks) {
     assert.equal(getProjectScopesCount(), initialProjectScopesCount - 1);
   });
 
+  test('can delete project with confirmation acceptance', async function (assert) {
+    assert.expect(2);
+    const confirmService = this.owner.lookup('service:confirm');
+    confirmService.enabled = true;
+    window.confirm = sinon.fake.returns(true);
+    await visit(existingProjectURL);
+    await click('.rose-layout-page-actions .rose-dropdown-button-danger');
+    assert.equal(getProjectScopesCount(), initialProjectScopesCount - 1);
+    assert.ok(window.confirm.calledOnce);
+  });
+
+  test('cannot delete project with confirmation denial', async function (assert) {
+    assert.expect(2);
+    const confirmService = this.owner.lookup('service:confirm');
+    confirmService.enabled = true;
+    window.confirm = sinon.fake.returns(false);
+    await visit(existingProjectURL);
+    await click('.rose-layout-page-actions .rose-dropdown-button-danger');
+    assert.equal(getProjectScopesCount(), initialProjectScopesCount);
+    assert.ok(window.confirm.calledOnce);
+  });
+
   test('saving an existing project with invalid fields displays error messages', async function (assert) {
     assert.expect(2);
     this.server.patch('/scopes/:id', () => {
diff --git a/yarn.lock b/yarn.lock
index f13b0ae16..32b4f960c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2975,6 +2975,42 @@
   resolved "https://registry.yarnpkg.com/@sindresorhus/is/-/is-0.7.0.tgz#9a06f4f137ee84d7df0460c1fdb1135ffa6c50fd"
   integrity sha512-ONhaKPIufzzrlNbqtWFFd+jlnemX6lJAgq9ZeiZtS7I1PIf/la7CW4m83rTXRnVnsMbW2k56pGYu7AUFJD9Pow==
 
+"@sinonjs/commons@^1", "@sinonjs/commons@^1.6.0", "@sinonjs/commons@^1.7.0", "@sinonjs/commons@^1.7.2":
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/@sinonjs/commons/-/commons-1.8.1.tgz#e7df00f98a203324f6dc7cc606cad9d4a8ab2217"
+  integrity sha512-892K+kWUUi3cl+LlqEWIDrhvLgdL79tECi8JZUyq6IviKy/DNhuzCRlbHUjxK89f4ypPMMaFnFuR9Ie6DoIMsw==
+  dependencies:
+    type-detect "4.0.8"
+
+"@sinonjs/fake-timers@^6.0.0", "@sinonjs/fake-timers@^6.0.1":
+  version "6.0.1"
+  resolved "https://registry.yarnpkg.com/@sinonjs/fake-timers/-/fake-timers-6.0.1.tgz#293674fccb3262ac782c7aadfdeca86b10c75c40"
+  integrity sha512-MZPUxrmFubI36XS1DI3qmI0YdN1gks62JtFZvxR67ljjSNCeK6U08Zx4msEWOXuofgqUt6zPHSi1H9fbjR/NRA==
+  dependencies:
+    "@sinonjs/commons" "^1.7.0"
+
+"@sinonjs/formatio@^5.0.1":
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/@sinonjs/formatio/-/formatio-5.0.1.tgz#f13e713cb3313b1ab965901b01b0828ea6b77089"
+  integrity sha512-KaiQ5pBf1MpS09MuA0kp6KBQt2JUOQycqVG1NZXvzeaXe5LGFqAKueIS0bw4w0P9r7KuBSVdUk5QjXsUdu2CxQ==
+  dependencies:
+    "@sinonjs/commons" "^1"
+    "@sinonjs/samsam" "^5.0.2"
+
+"@sinonjs/samsam@^5.0.2", "@sinonjs/samsam@^5.1.0":
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/@sinonjs/samsam/-/samsam-5.1.0.tgz#3afe719232b541bb6cf3411a4c399a188de21ec0"
+  integrity sha512-42nyaQOVunX5Pm6GRJobmzbS7iLI+fhERITnETXzzwDZh+TtDr/Au3yAvXVjFmZ4wEUaE4Y3NFZfKv0bV0cbtg==
+  dependencies:
+    "@sinonjs/commons" "^1.6.0"
+    lodash.get "^4.4.2"
+    type-detect "^4.0.8"
+
+"@sinonjs/text-encoding@^0.7.1":
+  version "0.7.1"
+  resolved "https://registry.yarnpkg.com/@sinonjs/text-encoding/-/text-encoding-0.7.1.tgz#8da5c6530915653f3a1f38fd5f101d8c3f8079c5"
+  integrity sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==
+
 "@storybook/addon-actions@^6.0.21":
   version "6.0.21"
   resolved "https://registry.yarnpkg.com/@storybook/addon-actions/-/addon-actions-6.0.21.tgz#0de1d109d4b1eb99f644bbe84e74c25cfd2b1b6b"
@@ -8286,7 +8322,7 @@ dezalgo@^1.0.0:
     asap "^2.0.0"
     wrappy "1"
 
-diff@^4.0.1:
+diff@^4.0.1, diff@^4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.2.tgz#60f3aecb89d5fae520c11aa19efc2bb982aade7d"
   integrity sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==
@@ -13501,6 +13537,11 @@ junk@^3.1.0:
   resolved "https://registry.yarnpkg.com/junk/-/junk-3.1.0.tgz#31499098d902b7e98c5d9b9c80f43457a88abfa1"
   integrity sha512-pBxcB3LFc8QVgdggvZWyeys+hnrNWg4OcZIU/1X59k5jQdLBlCsYGRQaz234SqoRLTCgMH00fY0xRJH+F9METQ==
 
+just-extend@^4.0.2:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/just-extend/-/just-extend-4.1.1.tgz#158f1fdb01f128c411dc8b286a7b4837b3545282"
+  integrity sha512-aWgeGFW67BP3e5181Ep1Fv2v8z//iBJfrvyTnq8wG86vEESwmonn1zPBJ0VfmT9CJq2FIT0VsETtrNFm2a+SHA==
+
 keyv@3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/keyv/-/keyv-3.0.0.tgz#44923ba39e68b12a7cec7df6c3268c031f2ef373"
@@ -14833,6 +14874,17 @@ nice-try@^1.0.4:
   resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
   integrity sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==
 
+nise@^4.0.4:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/nise/-/nise-4.0.4.tgz#d73dea3e5731e6561992b8f570be9e363c4512dd"
+  integrity sha512-bTTRUNlemx6deJa+ZyoCUTRvH3liK5+N6VQZ4NIw90AgDXY6iPnsqplNFf6STcj+ePk0H/xqxnP75Lr0J0Fq3A==
+  dependencies:
+    "@sinonjs/commons" "^1.7.0"
+    "@sinonjs/fake-timers" "^6.0.0"
+    "@sinonjs/text-encoding" "^0.7.1"
+    just-extend "^4.0.2"
+    path-to-regexp "^1.7.0"
+
 no-case@^3.0.3:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/no-case/-/no-case-3.0.3.tgz#c21b434c1ffe48b39087e86cfb4d2582e9df18f8"
@@ -15703,6 +15755,13 @@ path-to-regexp@0.1.7:
   resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-0.1.7.tgz#df604178005f522f15eb4490e7247a1bfaa67f8c"
   integrity sha1-32BBeABfUi8V60SQ5yR6G/qmf4w=
 
+path-to-regexp@^1.7.0:
+  version "1.8.0"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-1.8.0.tgz#887b3ba9d84393e87a0a0b9f4cb756198b53548a"
+  integrity sha512-n43JRhlUKUAlibEJhPeir1ncUID16QnEjNpwzNdO3Lm4ywrBpBZ5oLD0I6br9evr1Y9JTqwRtAh7JLoOzAQdVA==
+  dependencies:
+    isarray "0.0.1"
+
 path-type@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-1.1.0.tgz#59c44f7ee491da704da415da5a4070ba4f8fe441"
@@ -17745,6 +17804,19 @@ single-line-log@^1.1.2:
   dependencies:
     string-width "^1.0.1"
 
+sinon@^9.1.0:
+  version "9.1.0"
+  resolved "https://registry.yarnpkg.com/sinon/-/sinon-9.1.0.tgz#4afc90707c8e360fe051398eed2d3b197980ffc3"
+  integrity sha512-9zQShgaeylYH6qtsnNXlTvv0FGTTckuDfHBi+qhgj5PvW2r2WslHZpgc3uy3e/ZAoPkqaOASPi+juU6EdYRYxA==
+  dependencies:
+    "@sinonjs/commons" "^1.7.2"
+    "@sinonjs/fake-timers" "^6.0.1"
+    "@sinonjs/formatio" "^5.0.1"
+    "@sinonjs/samsam" "^5.1.0"
+    diff "^4.0.2"
+    nise "^4.0.4"
+    supports-color "^7.1.0"
+
 slash@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/slash/-/slash-1.0.0.tgz#c41f2f6c39fc16d1cd17ad4b5d896114ae470d55"
@@ -19076,6 +19148,11 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
+type-detect@4.0.8, type-detect@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
+  integrity sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==
+
 type-fest@^0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/type-fest/-/type-fest-0.11.0.tgz#97abf0872310fed88a5c466b25681576145e33f1"