diff --git a/spec/javascripts/packages/document-capture/components/acuant-capture-spec.jsx b/spec/javascripts/packages/document-capture/components/acuant-capture-spec.jsx
index 129e0f6c042..8c3b60f8aff 100644
--- a/spec/javascripts/packages/document-capture/components/acuant-capture-spec.jsx
+++ b/spec/javascripts/packages/document-capture/components/acuant-capture-spec.jsx
@@ -125,7 +125,6 @@ describe('document-capture/components/acuant-capture', () => {
 
       const button = await findByText('doc_auth.buttons.upload_picture');
       expect(button.classList.contains('usa-button--outline')).to.be.true();
-      expect(console).to.have.loggedError(/^Error: Could not load script:/);
       userEvent.click(button);
     });
 
diff --git a/spec/javascripts/spec_helper.js b/spec/javascripts/spec_helper.js
index 6165cecea00..2010ddd2818 100644
--- a/spec/javascripts/spec_helper.js
+++ b/spec/javascripts/spec_helper.js
@@ -17,10 +17,15 @@ chai.use(dirtyChai);
 global.expect = chai.expect;
 
 // Emulate a DOM, since many modules will assume the presence of these globals exist as a side
-// effect of their import (focus-trap, classList.js, etc). A URL is provided as a prerequisite to
-// managing history API (pushState, etc).
+// effect of their import.
 const dom = createDOM();
 global.window = dom.window;
+const windowGlobals = Object.fromEntries(
+  Object.getOwnPropertyNames(window)
+    .filter((key) => !(key in global))
+    .map((key) => [key, window[key]]),
+);
+Object.assign(global, windowGlobals);
 global.window.fetch = () => Promise.reject(new Error('Fetch must be stubbed'));
 global.window.crypto = new Crypto(); // In the future (Node >=15), use native webcrypto: https://nodejs.org/api/webcrypto.html
 global.window.URL.createObjectURL = createObjectURLAsDataURL;
@@ -30,13 +35,6 @@ Object.defineProperty(global.window.Image.prototype, 'src', {
     this.onload();
   },
 });
-global.navigator = window.navigator;
-global.document = window.document;
-global.Document = window.Document;
-global.Element = window.Element;
-global.Node = window.Node;
-global.getComputedStyle = window.getComputedStyle;
-global.self = window;
 
 useCleanDOM(dom);
 useConsoleLogSpy();
diff --git a/spec/javascripts/support/dom.js b/spec/javascripts/support/dom.js
index 32d64720ee2..215eee1e84c 100644
--- a/spec/javascripts/support/dom.js
+++ b/spec/javascripts/support/dom.js
@@ -27,7 +27,6 @@ export function createDOM() {
           : Promise.reject(new Error('Failed to load'));
       }
     })(),
-    runScripts: 'dangerously',
   });
 
   // JSDOM doesn't implement `offsetParent`, which is used by some third-party libraries to detect
@@ -61,6 +60,24 @@ export function createDOM() {
     .stub(dom.window, 'scrollTo')
     .callsFake((scrollX, scrollY) => Object.assign(dom.window, { scrollX, scrollY }));
 
+  // If a script tag is added to the page, execute its callbacks as a successful or failed load,
+  // based on whether the `src` is `about:blank`.
+  new dom.window.MutationObserver((mutations) => {
+    mutations.forEach((mutation) => {
+      mutation.addedNodes.forEach((node) => {
+        if (node instanceof dom.window.HTMLScriptElement) {
+          if (node.src === 'about:blank') {
+            if (typeof node.onload === 'function') {
+              node.onload();
+            }
+          } else if (typeof node.onerror === 'function') {
+            node.onerror();
+          }
+        }
+      });
+    });
+  }).observe(dom.window.document.body, { childList: true, subtree: true });
+
   return dom;
 }